Jump to content

dil_bert

Members
  • Content Count

    427
  • Joined

  • Last visited

  • Days Won

    2

dil_bert last won the day on December 25 2018

dil_bert had the most liked content!

Community Reputation

4 Neutral

About dil_bert

  • Rank
    Advanced Member

Profile Information

  • Interests
    used OpenSuse for more than 10 years - now stick to Manjaro; Interested in all raspi-things, Python, Perl, PHP and GIS,

Recent Profile Visitors

4,195 profile views
  1. dil_bert

    armbian and udoo-quad: which one does fit most?

    https://www.armbian.com/udoo-quad/ Armbian Stretch legacy kernel 4.4.y Armbian Bionic legacy kernel 4.4.y
  2. dear community i own a udoo quad which Armbian does fit to this hardware? love to hear from you
  3. hello dear experts, runned into issues while copy of data on a secure system (in desaster-recovery-mode) dute to some issues with the booting process of a Manjaro 18 XY Linux i dedided to testrun all the stuff with a live system. i did this and mounted SDA 1 and SDA 2 so far so good now i can see all the data - but wait: if i want to copy the data to a usb-stick this fails - with following issues warning... what would you say - love to hear from you greetngs
  4. helllo dear Experts, today i have a linux-question: suddenly i r un into issues - the system (Manjaro 18xy ) does not boot any more . see more infos for fully insights well i guess that i should update my system more regularly. i guess that i miss something on the machine: https://forum.manjaro.org/search?q=libidn2.so I subsequently will try to resolve this by running the following command: sudo pacman-mirrors -f3 sudo pacman -Syyuu well i need to use a chroot to let me run those on the installed system. But wait: can i do a update & new installation with a D V D !?? is this an option tooo!?
  5. hello and good day dear experts which servo w ould you use when creating this project; Arduino Radar Project https://www.youtube.com/watch?v=kQRYIH2HwfY see more details: https://howtomechatronics.com/projects/arduino-radar-project/ You can get these components from any of the sites below: Ultrasonic Sensor HC-SR04 Servo Motor Arduino Board - Mega Breadboard and Jump Wires well - the author does not describe which servo-motor he recommends
  6. dear community At the beginning of my story I have to say, that this was my first time to IOT topic - and to the ESP32 and 8266 I'm a complete beginner, but one thing I have is the desire to known new technologies. A month ago my colleague make presentation about #esp8266 and I was impressed this small board. So I decided that I would like to known more about #esp8266 and similar stuff. I use Micropython (http://micropython.org/download) it is a firmware for the #esp8266 boards. At the beginning i have to underestand how it works, but I have read allmost a ton of webpages and articles about it. some ideas regarding the aims: What is needed for the car: We need to meet some conditions with the RC-car. We ......: - have the car expect one command every second. If it does not receive one, it stops. - We can of course use the connection type that fits our existing hardware or use-case best. Once we have decided that, the search for a good connection library starts. well - if i want to go with some web-app or pc controlled thing, then i should choose TCP/IP / WIFI or bluetooth ( with ESP 32) regarding the hardware: firstly: I would say that i should not make use of an Uno and an esp-01 module. This makes life much more difficult. i think that i should choose a Wemos Mini D1 or a nodeMCU board. This will be smaller, cheaper and easier to use. secondly perhaps i should choose a less old-fashioned motor driver than the 298. These will work well with 3.3V circuits, be more efficient and maybe use fewer pins (which may be important when using the Wemos/nodeMCU). What do you think about this idea. thirdly i think that i have to go with MicroPython: - it is a pretty intersting approach to stick - working with ESP8266 or ESP32 btw regarding the use of MicroPython i have found an interesting approach here: written by david golak: https://hackaday.io/project/27444-remote-control-car-via-wifi How to build RC Car with the esp8266. see the code https://github.com/dgolak/esp8266/blob/master/main.py import machine import time LED_PIN=15 led=machine.Pin(LED_PIN,machine.Pin.OUT) led.off() LIGHT_PIN_L=13 light_l=machine.Pin(LIGHT_PIN_L,machine.Pin.OUT) light_l.off() LIGHT_PIN_R=2 light_r=machine.Pin(LIGHT_PIN_R,machine.Pin.OUT) light_r.off() class engines: def __init__(self, machine): self.machine = machine self.left_first_pin = 0 self.left_second_pin = 5 self.right_first_pin = 14 self.right_second_pin = 12 def forward(self, duty=1000): self.stop() e1=machine.PWM(self.machine.Pin(self.left_first_pin),freq=100,duty=duty) e2=machine.PWM(self.machine.Pin(self.right_first_pin),freq=100,duty=duty) def backward(self, duty=1000): self.stop() e1=machine.PWM(self.machine.Pin(self.left_second_pin),freq=100,duty=duty) e2=machine.PWM(self.machine.Pin(self.right_second_pin),freq=100,duty=duty) def left_up(self): self.stop() e1=machine.PWM(self.machine.Pin(self.left_first_pin), freq=100, duty=400) e2=machine.PWM(machine.Pin(self.right_first_pin), freq=100, duty=1000) def right_up(self): self.stop() e1=machine.PWM(self.machine.Pin(self.left_first_pin),freq=100,duty=1000) e2=machine.PWM(self.machine.Pin(self.right_first_pin),freq=100,duty=400) def left_down(self): self.stop() e1=machine.PWM(self.machine.Pin(self.left_second_pin), freq=100, duty=400) e2=machine.PWM(machine.Pin(self.right_second_pin), freq=100, duty=1000) def right_down(self): self.stop() e1=machine.PWM(self.machine.Pin(self.left_second_pin),freq=100,duty=1000) e2=machine.PWM(self.machine.Pin(self.right_second_pin),freq=100,duty=400) def stop(self): machine.PWM(self.machine.Pin(self.left_first_pin),freq=0,duty=0) machine.PWM(self.machine.Pin(self.right_second_pin),freq=0,duty=0) machine.PWM(self.machine.Pin(self.left_second_pin),freq=0,duty=0) machine.PWM(self.machine.Pin(self.right_first_pin),freq=0,duty=0) E=engines(machine) try: import usocket as socket except: import socket CONTENT = b"""\ HTTP/1.0 200 OK Hello #%d """ CONTENT = b"""\ HTTP/1.0 200 OK Content-Type: text/html\n\r <html> <script src="http://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js" type="text/javascript" charset="utf-8"> </script> <head> <script type="text/javascript"> var DEVICE_URL = 'http://%s' function iotAction(action){ if(action=='change_led'){ if(document.getElementById('led_value').value==1){ action='led_off' document.getElementById('led_value').value=0 document.getElementById('led_control').style.backgroundImage="url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/alarm_off.jpg')" }else if(document.getElementById('led_value').value==0){ action='led_on' document.getElementById('led_value').value=1 document.getElementById('led_control').style.backgroundImage="url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/alarm_on.jpg')" }else{ action="led_on" } } if(action=='change_light'){ if(document.getElementById('light_value').value==1){ action='light_off' document.getElementById('light_value').value=0 document.getElementById('light_control').style.backgroundImage="url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/light_off.jpg')" }else if(document.getElementById('light_value').value==0){ action='light_on' document.getElementById('light_value').value=1 document.getElementById('light_control').style.backgroundImage="url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/light_on.jpg')" }else{ action="light_on" } } var requestURL = DEVICE_URL + "/?action="+action $.get (requestURL) } </script> <style> #container{ width:800px; height:1300px; background-image:url("https://raw.githubusercontent.com/dgolak/esp8266/master/images/navi2.png"); background-position:40px 110px; background-size:720px; background-repeat: no-repeat; -webkit-user-select: none; padding-top:100px; } button{ background-color:transparent; border-color:transparent; border:0px solid red } </style> </head> <center> <div id="container"> <table cellpadding="0" cellspacing="0"> <tr> <td style="padding-left:130px;" colspan="3"> <button style="width:440px;height:150px" ontouchstart="iotAction('forward')" ontouchend="iotAction('stop')"/> </td> </tr> <tr> <td><button style="width:180px;height:190px" ontouchstart="iotAction('left_up')" ontouchend="iotAction('stop')"/></td> <td rowspan="2"><button style="width:350px;height:370px" ontouchstart="iotAction('stop')" ontouchend="iotAction('stop')"/></td> <td><button style="width:180px;height:190px" ontouchstart="iotAction('right_up')" ontouchend="iotAction('stop')"/></td> </tr> <tr> <td><button style="width:180px;height:220px" ontouchstart="iotAction('left_down')" ontouchend="iotAction('stop')"/></td> <td><button style="width:180px;height:220px" ontouchstart="iotAction('right_down')" ontouchend="iotAction('stop')"/></td> </tr> <tr> <td style="padding-left:130px;" colspan="3"> <button style="width:440px;height:150px" ontouchstart="iotAction('backward')" ontouchend="iotAction('stop')"/> </td> </tr> </table> <br/><br/> <table> <tr> <td> <input type="hidden" id="light_value" value="0"/> <button id="light_control" style="width:200px;height:200px;background-image:url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/light_off.jpg');background-size:200px;"" ontouchstart="iotAction('change_light')"></button> </td> <td> <input type="hidden" id="led_value" value="0"/> <button id="led_control" style="margin-left:20px;width:200px;height:200px;background-image:url('https://raw.githubusercontent.com/dgolak/esp8266/master/images/%s');background-size:200px;"" ontouchstart="iotAction('change_led')"></button> </td> </tr> </table> </div> </center> </html> """ def main(E,micropython_optimize=False): s = socket.socket() ai = socket.getaddrinfo("172.20.10.10", 80) addr = ai[0][-1] s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) s.bind(addr) s.listen(5) while True: res = s.accept() client_sock=res[0] if not micropython_optimize: client_stream = client_sock.makefile("rwb") else: client_stream = client_sock req = client_stream.readline() get = req.split()[1].decode('utf-8') if get == '/?action=forward': E.forward() elif get == '/?action=left_up': E.left_up() elif get == '/?action=right_up': E.right_up() elif get == '/?action=left_down': E.left_down() elif get == '/?action=right_down': E.right_down() elif get == '/?action=backward': E.backward() elif get == '/?action=stop': E.stop() elif get == '/?action=led_on': led.on() elif get == '/?action=led_off': led.off() elif get == '/?action=light_on': light_l.on() light_r.on() elif get == '/?action=light_off': light_l.off() light_r.off() else: pass while True: h = client_stream.readline() if h == b"" or h == b"\r\n": break if led.value() == 1: led_icon="alarm_on.jpg" else: led_icon = "alarm_off.jpg" client_stream.write(CONTENT % (wlan.ifconfig()[0],led_icon)) client_stream.close() if not micropython_optimize: client_sock.close() main(E) see https://github.com/dgolak/esp8266/blob/master/main.py well i guess that this is a straingthforward approach... cf: david golak: https://hackaday.io/project/27444-remote-control-car-via-wifi How to build RC Car with the esp8266. btw: my car has got a option of a steering axle - in other words - i have a slightly different car - than David has. But that i think does not make a big difference.. I have to change the code at some places to fit. i will have a closer look at this. regards
  7. Hello, clever people! I need help - my Manjaro Version 18.xy does not boot fully. (/note: at the moment i do not sit in front of the Notebook - so i do not have the full information. i will provide you with more infos and details after the weekend. **one question at the moment:** is there a option to re-install the system wiothout loosing the data!? love to hear from you
  8. dear community, this is a question regarding MicroPython i want to headstart in MicroPython what do i need to do the first steps? - do i need to have a pyBoard from Adafruit!? or is it okay if i just start on systems like - ESP 32 - or a ESP8266-based device called WEMOS D1 or a SBC-NodeMCU-ESP8266 which is just another developer platform regarding the wemos We’ll be using an ESP8266-based device called WEMOS D1 mini. Basically, it’s a Wi-Fi chip with a couple of digital and analog I/O pins to connect external sensors and actuators. But for our simple demo, we won’t need anything besides the LED light that is already located on the device and is connected to the digital output pin 2.  look forward to hear from you 
  9. this is a protocol-discussion: a rc-car that makes use of ESP8266 and the: Websockets, TCP, UDP, RF which one to take..? The aim of this project is to build a transmitter and a receiver by using a cheap and easy to use component such as ESP8266,(...or alternatively Arduino UNO, Arduino Nano, and nRF24L01 transceiver.) This project should be a good start point for beginners. One of the main questions is the question of the architecture and the protocols to choose: note: I am a beginner in this field and would like some direction - what approach do I take that will allow me to keep the cost low (e.g. no bluetooth modules)? especially the question which protocoll i should use with the ESP8266 is a question: should i us Websockets / TCP or UDP or RF how would you decide? i want to create an ESP8266 project about a Wi-Fi controlled (ESP8266) RC car using. - with a tight budget you can't really buy everything you need at once. what is needed - which materials do i need: - an ESP8266 / (or alternatively Arduino UNO, Arduino Nano, and nRF24L01) (well i would say - Arduino uno and esp-01 module is difficult and more expensive that choosing a Wemos Mini or a nodeMCU board. advantages; this will be smaller, cheaper and easier to use than e e) - an L298N motor driver - H-bridge - an LF33CV 3.3V regulator - an RC car - also batteries, that meet our needs regarding the protocolls - not yet every decision is made: the protocols are thinkable: Websockets, TCP, UDP, RF - which protocol should i use!? - Websockets, TCP, UDP, RF - protocoll? since i am quiet a beginner here - i want to recapitulate the options we have here: There are two types of Internet Protocol (IP) traffic. They are TCP or Transmission Control Protocol and UDP or User Datagram Protocol. TCP is connection oriented - once a connection is established, data can be sent bidirectional. UDP is a simpler, connectionless Internet protocol. Multiple messages are sent as packets in chunks using UDP. The Websocket's require to be frank - systematically an extra overhead for an arduino and esp8266. The issue is that we need to implement (or find a library for) a webserver with HTTP and websocket support. a side effect; All that overhead is going to be eating up the available memory leaving less for my actual car controlling code to work with. UDP is a protocol without typical connection, but also without delivery control. I guess that the UDP is protocol of choice: - If the packet will be lost-nobody cares. i guess that a simple UDP setup would be best probably. That means that i can just fire off some data packets with commands for the car. With UDP there's a chance some may get lost in transit, if that's a problem then i also might make use TCP instead....i will take into consideration the options ... conlusio: A simple UDP setup would be best probably. Just fire off some data packets with commands for the car. With UDP there's a chance some may get lost in transit, if that's a problem then use TCP instead. With that i can keep things simple. with the UDP i can make use of the great ESP8266 - choosing a Wemos Mini or a nodeMCU board. But wait: why should i use remote control over WiFi? There are way that are even easier; why shouldn ´t i take some simpler RF protocol? That would be even faster. the RF protocol? some recaps: What if i am going to design a remote controlled car and one of the aims is for the controller to be a smartphone. With this i an make use of a transmitter plugged into the headphone jack (that is a Audio-Headphone-signal) which would interpret audio signals that are being sent from a certain controller-app on the mobile phone and then send an appropriate signal to the system of the rc-car. Some musings about the needed tasks: what has to be controlled on the RC-Car: To sumarize all, that needs to be controlled is the the mode of motion: - forwards/backwards-motion and the steering (i.e. turning left or right): - Ideally it would be able to have speed control - not just forwards and backwards. Well my initial idea was to make usage of something like this for radio transmission: but then it would mean doing some kind of sinal transformation that looks quite annoying: in fact: i have the signal-processing that goes like this: analog -> digital and sending digital data with some kind of protocol, so then I thought of sending just the analog data but I'm not sure how that would separate the signal fo the two control-cirquits: i.e. forward/backward and right/left. Some possible solutions: Well the so called "standard" RC protocol is to transmit bursts of AM /(FM) pulses, the relative positions of which are translated by the receiver into a variable-width control pulse-signal. And subsequently this signal is going to be sent to the variouls servos. Well i guess, that it should be pretty straightforward for a (let me say) smartphone app (see for example roboremo -the rc car app :: see https://www.roboremo.com/esp8266-wifi-rc-car.html ) to send pulses out the headphone jack, which are then used to key a simple RF transmitter on a standard RC control frequency. one of the main advantages: we would be able to use in the car comodity of the shelf things: we 'd use an off-the-shelf RC receiver and servos to control the car. - The servo-side of the game: a standard RC servo requires a control-pulse-signal that has a variable width of 1-2 ms (sometimes this may be extended to 0.5-2.5 ms) and repeats at a 20-50 Hz rate. - a basic RC car might have as few as two servos, note a plane might have more each of which needs its independently-controlled pulse-signal. so based on the above mentioned ideas _ which protocol would you use! see a rf-solution: https://www.instructables.com/id/RF-Control-System-For-RC-Vehicle-Based-On-Arduino-/
  10. hello dear Kicken, many many thanks for the quick reply - great to hear from you. convinced : A simple UDP setup would be best probably. Just fire off some data packets with commands for the car. With UDP there's a chance some may get lost in transit, if that's a problem then use TCP instead. With that i can keep things simple. with the UDP i can make use of the great ESP8266 - choosing a Wemos Mini or a nodeMCU board. But wait: why should i use remote control over WiFi? There are way that are even easier; why shouldn ´t i take some simpler RF protocol? That would be even faster. what do you say? the RF protocol? some recaps: What if i am going to design a remote controlled car and one of the aims is for the controller to be a smartphone. With this i an make use of a transmitter plugged into the headphone jack (that is a Audio-Headphone-signal) which would interpret audio signals that are being sent from a certain controller-app on the mobile phone and then send an appropriate signal to the system of the rc-car. Some musings bout the needed tasks: what has to be controlled on the RC-Car: To sumarize all, that needs to be controlled is the the mode of motion: - forwards/backwards-motion and the steering (i.e. turning left or right): - Ideally it would be able to have speed control - not just forwards and backwards. Well my initial idea was to make usage of something like this for radio transmission: but then it would mean doing some kind of sinal transformation that looks quite annoying: in fact: i have the signal-processing that goes like this: analog -> digital and sending digital data with some kind of protocol, so then I thought of sending just the analog data but I'm not sure how that would separate the signal fo the two control-cirquits: i.e. forward/backward and right/left. Some possible solutions: Well the so called standard RC protocol is to transmit bursts of AM /(FM) pulses, whereas the relative positions of which are translated by the receiving side will turn into a variable-width control pulse-signal subsequently. And subsequently this signal is going to be sent to the variouls servos.Well i guess, that it should be pretty straightforward for a (let me say) smartphone app (see for example roboremo or others -the rc car app :: see https://www.roboremo.com/esp8266-wifi-rc-car.html ) to send such mentioned pulses out the headphone jack, which are then used to key a simple RF transmitter on a standard RC control frequency like xyz. one of the main advantages: we would be able to use in the car comodity of the shelf things: we 'd use an off-the-shelf RC receiver and servos to control the car. - The servo-side of the game: a standard RC servo requires a control-pulse-signal that has a variable width of 1-2 ms (sometimes this may be extended to 0.5-2.5 ms) and repeats at a 20-50 Hz rate. - a basic RC car might have as few as two servos, note a plane might have more each of which needs its independently-controlled pulse-signal. btw. see a rf-solution: https://www.instructables.com/id/RF-Control-System-For-RC-Vehicle-Based-On-Arduino-/ well kicken - what would you say!? should i use udf or rf protocol !? love to hear from you
  11. dear community a Wi-Fi controlled using Arduino UNO, ESP8266 RC car using Websockets or UDP how would you decide? i want to create an Arduino project about a Wi-Fi controlled (ESP8266) RC car using. - with a tight budget you can’t really buy everything you need at once. what is needed: An Arduino UNO An ESP8266 An L298N motor driver - with or without H-bridge An LF33CV 3.3V regulator An RC car Also batteries that meet your needs / much better: a power-pack regarding the protocolls - not yet every decision is made: - which protocol should i use!? - WebSocket protocol or UDP-protocoll? i need to figure out what else is needed to run this project with ESP8266 / NodeMCU one. what is WebSocket Protocol? guess that i first will try out to go with the WebSocket-approach but furthermore: well after setting up all with a WebSocket-approach i afterwards will also try controlling the car with other protocols like HTTP or UDP to see the difference, if any. what do you think?
  12. some musings well i am trying to figure it out. guess that I'd try to use a car chassis - a truely simple as possible car. Guess that this would be a good choice. This would achieve multiple goals that are intendet and i guess that would be a great benefit. - keep it simple - this is a top notch goal - and i guess that it is pretty important. - By using a simple and easy to build - vehicle with the least amount of complexity we can keep the price low. And that would be very very nice! - By going this way - we would achieve to avoide unnecessary parts the students' attention will not play with the "unnecessary parts of the car " - the main and foremost important goal is to get them more inclined to listen and cooperate if they are not wondering about or playing with the bucket lifting mechanism of 8071 technic-car. - Well to achieve that - it is pretty important to keep an eye on the partslist: The less parts included in the design, the less chances for something to go wrong so i schould choose a simple car. - Some space is needed in order to mount the required hardware (motor, batteries, receiver, anything inbetween) and this space is best left open for easy access to inspect, explain, debug, repair, replace, etc. - This approach would be great to upgrade the "final result" to do even more with it - eg. in the future: either functionally (adding lights, brakes, and addtional things and stuff etc), also aesthetically and what is most intersting for me. to enhacne the wohle thign electronically (adding additional subsystems) or mechanically. Therefore i think that i should go with building a simple steered front axle without suspension, a rear axle that is nothing more than an axle and two wheels. guess i put all the pieces to a flat assembly.. What do you say!?
  13. dear experts dear friends, i am starting a project - Arduino-izing Lego Technic - and now i need some ideas for a car / vehicle to choose. This project starts out as a quest to find a way to combine ease of Lego Technic chassis building with cheap commodity electronics to motorize and remote control it. I am looking for a car / vehicle that is able to work for this. This could be a simple chassis too: cf the following examples: https://www.instructables.com/id/Build-your-own-Custom-Arduino-Remote-Control-and-L/ https://www.hackster.io/Notthemarsian/take-control-over-lego-power-functions-ee0bfa https://www.instructables.com/id/Raspberry-Pi-Remote-Controlled-Car-1/ This should be a part of a robotics workshop and therefore I need a Lego-based platform for younger kids who grew up with Lego but cannot afford to spend hundreds of dollars to buy power functions, Lego motors, IR remote, and EV3. Thanks to numerous examples on the net and several and Youtube tutorials on integrating Arduino with Lego. I will try to start out with an interesting example. starting point; the kids should be able to complete this project with a small budget and I hope to incorporate this into my robotics workshop in the future. the main thing is: i need to have the rear axle to be attached to a single N20 motor to move the kart forward and reverse via a TB6612FNG motor driver. Front steering can be controlled by an SG90 servo motor. Remote control should be able to be accomplished by a cheap IR remote/receiver solution based on a. Arduino b. Zigbee c. bluetooth I understand that IR remote thing /(and the method ) is pretty hard part toimplement and learn about a remote control system so it was a perfect option for this car. since this is just a proof-of-concept project and the design follows function - i need to have an idea the main question is: which Lego car to choose? btw: what about Lego Technic-8071 - the Service Truck!? what would you suggest?
  14. hello dear experts i want to take a Lego-Car (only a basic - chassis like here: https://www.instructables.com/id/Build-your-own-Custom-Arduino-Remote-Control-and-L/ ) The aim is to control Lego buildings from Arduino boards with low cost parts. This first projet where i do not want to adapt the traditional servo-motor 9g to plug it with Lego blocks. I want to stick with the Lego Power-functrions. in other words: For this project i do not want to make use of the low cose parts: i.e. the servo-motor 9gi want to take Control Over the Lego Power Functions and the so called Lego Technic Servo Motor. the question is: how to control Lego motors and servos with Arduino some musings: - Lego has a 4 cable connector. Two of them supply power (+9V & GND) and the other are optionally +9V and they are called C1 and C2. - the Servo turns in some directions: eg right or left max 90 deg when we supply PWM to either C1 ("left") or C2 ("right"). (or the other way round - in other words left and right and viceversa) That basically means that what I need is a 9V PWM and be able to supply it to either C1 or C2. What is more the frequency has to be 1150 Hz. Now the question is how do I achieve this goal? i have heard about using the L298N motor-controller: The A L298 dual H-Bridge motor control module for Arduino - this can help here to get connected to wired control LEGO Power Functions Motor. With this Arduino can control LEGO Power Functions Motor to forward, backward, and besides this also in the so called float, brake, PWM variable speed, and lots of other things more. how to controll the Lego-Power functions: Well i guess that i have have few options, with different precision and complexity: 1. i can do this with some configurations one of the PWM HW blocks 2. i can make usage of a timer to trigger a sw function - but it might be simpler to just configure the Pulse wiede Modulation HW block. 3. i can make usage of some existing legacy library that will implement one of the above mentioned methods the question: which method would you recommend i am willing to learn something of the AVR internals and it will be the solution with the least overhead. are there some tutorial. besides this: is there a brick that i can use here? i have heard bout a brick: see: https://www.eurobricks.com/forum/index.php?/forums/topic/152982-brick-to-connect-pf-motor-to-arduino-board/ do you recommend this brick - do you think that this is useful!?
  15. hello dear php-experts, well i have a base-db: it does not run well - it needs a hsqldb/jdbc/JDBCDriver well i need to load this. http://hsqldb.org/doc/src/org/hsqldb/jdbc/JDBCDriver.html public class JDBCDriver extends java.lang.Object implements java.sql.Driver but i get the errors - that tell me the db cannot be foundHow to set up the jdbc driver to connect to hsqldb from libreoffice? how can i get the db up and running!?
×

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.