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  1. Technoman


  2. Technoman

    redemarrage du picaxe...

    Bonjour, Les schémas de principe et de câblage seraient bien utiles. Avez-vous essayé d'alimenter le picaxe sur des piles/accus?
  3. Technoman

    DSMx drone driving

    Hi, It was given to me a drone (PNJ DR-KRAFT) without the remote controller. I intend to use it to film sport practice on programmed trajectories. As the DSMx protocol is being used, on which I should gather more informations, I wonder if it is possible : to handle the DSMx protocol using a...
  4. Technoman

    Cannot get rfout and serin to work correctly or reliably

    Some pins on the 18M2 seems not connected (like serial in - pin 3) or the diagram is incomplete?
  5. Technoman

    Cannot get rfout and serin to work correctly or reliably

    Hi, At first look, there is something wrong on the transmitter diagram according to the pinout of your TX2 module. Pin 2 should be connected to Vcc but is connected to GND considering a mirrored view, etc. The pinout of the TX2 should be identical to the datasheet.
  6. Technoman

    PWM motor drive makes PICAXE reset

    I wish placing capacitors would solve your problem ; that's a good practice. It did not work on our circuit driving a robot in PWM mode. The working solution was to supply separately the microcontroller side using a diode and a large capacitor (470/1000µF), so low voltage drops would not affect...
  7. Technoman

    Looking for "Optical Encoder" to Count Wheel Revolutions

    Hi, Years ago, we did use an encoder-design software you may find here :
  8. Technoman

    Choice of Display module.

    Interesting to know : the TM1637 chip also integrate a keyboard scan interface.
  9. Technoman

    Choice of Display module.

    Hi, If you really want a led display, how many digits per line do you need and what is the chosen colour (red, yellow, green, white, ...)? You may find some 4 to 6 digits displays based on TM1637 chip (e.g. 4 digits led display) or 8 digits based on MAX7219 chip (e.g. 8 digits led display)...
  10. Technoman

    Shift registers

    Hi, Have a look at this project, submitted in 2016 : Shift Register
  11. Technoman

    AXE300 +grove mp3 v2.0

    Bonjour, Bienvenue sur le forum. J'ai découvert par hasard votre message. Il est malencontreusement placé sur les projets terminés, au lieu de la partie francophone. Concernant votre problème, avez-vous suivi la façon de nommer les fichiers audio sur la carte SD? Voir la notice (en anglais)...
  12. Technoman

    Bizarre 18X headscratcher

    You don't mention if your PCB is home-made. I would recommend to check the tracks with an ohmmeter. Is a socket soldered on the PCB or are you using the same in both case? A picture could help. The download socket could be eventually a faulty one.
  13. Technoman

    Bizarre 18X headscratcher

    @AllyCat : logic level on pin 4 (Reset) is probably correct otherwise the chip would not flash the LED.
  14. Technoman

    Bizarre 18X headscratcher

    On the download socket, RXD and TXD are they properly connected ? (above view like in Picaxe manual) Can you trace the signal, using a scope?
  15. Technoman

    Bizarre 18X headscratcher

    Hi, Did you check from the copper side of your pcb or from the chip side of the socket? It could be a bad solder joint.
  16. Technoman

    Error writing to 28x2 (AXE401) - SOLVED

    Hi, I would first check the position of the jumper links, then use a scope connected to Serial in (pin 6).
  17. Technoman

    2 picaxe 1 supply

    As an other factor, your don't even need a low noise power supply as required in an hi-fi analogue amplifier. In order to get the highest energy efficiency (little heat), the use of step down converters is your best choice. By now, you can get these devices at a low price ; it was not obvious...
  18. Technoman

    relai qui grésille

    Concernant la bobine du relais, qu'en est-il de l'alimentation 12V? Est-elle stable? Un schéma et une photo pourraient aussi aider.
  19. Technoman

    Project Panel Labels

    Since laser cutter/engraver is becoming more popular, prices have dropped. In my area, a next superstore has a corner for DIY project where you pay for the time the machine is being used. For a public fab lab, you usually pay for an annual fee and maybe an extra if you are using some specific...
  20. Technoman

    relai qui grésille

    Si la charge est une entrée, elle ne doit donc pas être de nature inductive (résistance + opto-coupleur+...) ; un charbonnage est effectivement improbable. Vu le faible courant commuté (30 mA), pour un courant maxi de 12A, le relais n'est vraiment pas contraint. Le vendeur est sérieux et...