Search results

  1. G

    My brain is fried... a wireless network

    One the members here, "srnet" put a Picaxe and an RF22 on a Cubesat. It reliably transmitted data from earth orbit. I have used Si4432 modules with Picaxe. These use SPI to communicate between the microcontroller and the RF module and can be a bit tricky to configure. The range...
  2. G

    Other options to wirelessly program PICAXE?

    Wireless programming can be tricky with a Picaxe ( Or any other Microcontroller). With the Picaxe, it requires RF modules that act as a transparent UART and that also support break signaling. Since ERF modules are no longer available the choices are slim. I have had wireless programming...
  3. G

    4-20mA project

    My guess is that you do not have the grounds for the separate supplies tied together. Run a wire from the Pot's ground side directly to Picaxe 0V Pin. ( I would recommend a 10K Pot instead of a 1K) Measure the voltage from the Picaxe 0V Pin to PinC.1. While turning the POT full range...
  4. G

    Higher Wattage 12v Card LED strobe unit

    Attached is a example diagram of how I would do it. I have used Dual Mosfet drivers and low RDSOn FETS. This gives superior performance and efficiency. However, if you only need to turn the LED's on and off occasionally then you can get by without the Mosfet drivers and can use Logic Level...
  5. G

    ASCII Characters in sertxd Output ?

    Since you did not say, I am guessing from a previous post that you are using a Picaxe 18M2 If you cannot figure out a way to place the suggested resistor, then you might try placing a "Low C.3" as the very first line of the program. This will set the sertxd Pin as an output and make it low...
  6. G

    N38400_32 BaudMode between 18M2 and 20M2 with qualifier

    The diagram below may help a bit for checking baudrate. Have the Picaxe send two bytes ("UU") or (85,85) and then measure per the diagram below. #Picaxe 18M2 Setfreq M32 Low C.6 '// Make Serout Pin as output and set low Do Serout C.6, N38400_32,(85,85) pause 16 '// 2 ms...
  7. G

    Reading a negative voltage with ADC

    Here's an idea that should not be too painful. Make a patch cable as diagrammed below.
  8. G

    Doing Work for Students

    I just got a private message from a complete newcomer offering to pay me for writing the Picaxe Basic code for a school project for him and his group. He indicated that the project would be going to exam. Here was my reply If you are contacted, I suggest you reply in a similar manner.
  9. G

    Controlling 12v circuit from a high or low pin

    See Attached for diagram EDIT: Changed FET to TO-220 through-hole type for easy mounting.
  10. G

    PE6: How do you prevent the simulator buttons from disappearing?

    When I click on the simulate tab, it opens up a "ribbon" with some buttons like Run,Step,Break , etc. However as soon as you click on one of them, the ribbon automagically disappears. This makes trying to step through code a real pain. If you even move the program window whatever ribbon is...
  11. G

    PWMOUT and READTEMP need HELP!

    I still suspect a wiring problem. Also there is no series resistor from the Picaxe to the Mosfet Gate. The photo shows messy wiring and improper use of the breadboard. The power rails are meant to be used. I am not nit-picking here, just trying to get the sensor working. This should not...
  12. G

    What Happened to Goeytex?

    Dear Friends, I will be offline for a while due to several small "strokes" that have severely affected my vision. They say the vision will likely come back eventually, but staring at computer screens and hand soldering SMD components is not part of the rehab plan. All my microcontroller...
  13. G

    Low Cost DYI "1-Wire" Serial Backpack 57600 bps

    While this is not technically a Picaxe project, it is provided here to give Picaxe users an inexpensive way to have a high speed serial interface from a Picaxe to a standard 16 x2 LCD display module. If you have access to a Pic Programmer then you can make a high speed "1-wire" LED serial...
  14. G

    OT : LED Brake lights, why do they strobe ?

    Things have come a long way. Here is a pic of a light head that I built back on 2007 as part of a portable military tactical lighting system. It has 24 Cree 3 watt LEDs. 12 are spots and 12 are floods. There are also 8 5-watt infrared LEDs where 4 are spots and 4 are floods. This thing can...
  15. G

    Homemade NKM2401

    I recently looked in my parts bin and realized that I had accumulated over 10 pairs of ASK RF Modules. These are cheap "dumb" modules, but if care is taken, can be used with a Picaxe to create a fairly robust RF link. One way to make a reliable & robust RF link with these cheap modules is to...
  16. G

    Interfacing Newhaven Parallel Display with Picaxe

    I have recently acquired a Newhaven Parallel 16x2 Display - NHD-0216BZ-FL-YBW This display uses a Sitronix ST7066U Controller/Driver. Does anyone have any experience with this display / controller? I am not having a problem, just looking for any tips/tricks or heads up before I begin...
  17. G

    Keeping Picaxe alive with a transistor (or something else?)

    Here is a very simple way of doing what you want. No transistors or supercaps needed. Assuming a battery supply with no regulator: 1. Switch Pressed. A. Picaxe gets continuous power. B. Capacitor C2 charges to +V C. Picaxe operates normally 2. Switch is released. A. Power is...
  18. G

    PICAXE To PIC

    About two years ago I given given a (legal/original) copy of PicBasicPro, and an ICD2 Debugger/Programmer. Last week I found myself needing a small/fast program that the Picaxe just couldn't do. I also wanted to program some PICs with the NKM2401 hex code provided by Rev Ed. So I gathered up...
  19. G

    Using an INHAOS LC-1000 with the Picaxe

    I received several INHAOS LC-1000 RF Transceiver modules a while back and have finally gotten around to testing them with a Picaxe. They work amazingly well for short range RF comms. The main challenge for the hobyist is to get wires/ connectors on to the LC-1000 module. The pad spacing is...
Top