Search results

  1. B

    Hardware Serial input problem with a 20X2

    I’m having a problem with the hardware serial input to a 20X2. I’ve used this feature before with a GPS and other inputs and found it to work very simply and reliably in the past but not today. I’ve narrowed my current problem down to the following simple program. The program receives 3 short...
  2. B

    Is Hserin really this slow?

    I’ve been trying to use Hserin in a project where quite long sequences of characters are being received and it would be difficult to process the characters and not miss any arriving characters - but I’ve been very disappointed with Hserin. To demonstrate my problem, I’ve set up this test...
  3. B

    Wireless Remote Question

    I’m trying to simulate a 433 MHz wireless remote control but have been unable to do so. Below are two Saleae screen grabs of two radio transmissions received on an ASK wireless receiver. The first is from the genuine remote transmitter while the second is from a 08M2 programmed to simulate the...
  4. B

    Problems with Sonoff RF WiFi Switch

    I was planning to use a picaxe to control a Sonoff WiFi switch via its black button. Rather than hack into the switch contacts pins, I thought it might be easier to use a 433 MHz transmitter to simulate the remote control of the RF version of the Sonoff. However, I’ve been unable to even get to...
  5. B

    Possible Picaxe Software Problem?

    I have an 08M2 picaxe that is acting quite strangely and I’m starting to think it’s a problem with the picaxe and not me. I know the odds are against me but ... The attached is a slight variant of a program that I’m currently using to monitor a water meter fitted with a reed switch that opens...
  6. B

    Where to buy cheap USB to Serial Adapter

    Can anyone tell me where I can buy a cheap USB to Serial Adapter. I bought some some years ago and they worked well but a couple of them have failed recently and I'm down to my last one. I tried following the advice from SAborn in #12 of this thread and placed a couple of orders but they have...
  7. B

    Using Timer 1 Gate hardware to latch a pulse

    I recently wanted to connect an 08M2 to the 1 second PPS output from an EN-406 GPS module. The high pulse is only 1uSec long so I thought I’d use the Timer1 Gate logic to latch the pulse as suggested by AllyCat in #10 of this thread. However, it only seems to latch every second pulse (ie a 2...
  8. B

    Transferring data between Excel and a USB-RS232 com port

    Has anyone got VBA code or a reference to VBA code that can run in Excel 2007 (or later) using Windows Vista (or later)? I have tried the VBA code given here but I couldn’t get it to open a com port. It said my port number 6 which corresponds to my usb-RS232 cable was out of range. It seems...
  9. B

    Problems with TLE5206 H-Bridge

    I’m wondering if anyone else has used a TLE5206 H-Bridge recently and what is their experience with them. I first bought 4 of these from China back in 2012 and found them very useful. One was used in a model train with PWM for forward and backward motor control and another to drive an...
  10. B

    Problems with Bluetooth RS232 communication

    I'm having problems with bluetooth RS232 communication. I bought one of these and have successfully communicated with it @ 38400 baud using my homemade 08M2 GP module and have set its communication baud rate to 4800. I also bought one of these (Ver 4.0#01) and have let Windows Vista install...
  11. B

    Problems with AD9850 signal generator

    About a year ago, I bought a couple of AD9850 signal generator modules on Ebay for about $5 each. I don’t have any specific need for such a device but thought it could be interesting to see how they worked. I’ve only now got around to trying them out and I haven’t had any luck so far getting a...
  12. B

    Tutorial on using SRLatch as a 555 timer

    I've recently used the SRLatch feature on the 08M2 for the first time to latch some fast pulses and it worked well. I see in the description of the SRLatch command that "The SR latch also contains an internal clock source. This means the SR latch can be optionally configured to act like a ‘555...
  13. B

    Problems with controlling the messages from a GPS EM406A

    Has anyone successfully managed to control the output of standard messages of a GPS EM406A (http://www.futurlec.com.au/GPS/EM-406A.jsp) from Futurlec? I'd like to stop the GSV satellite data from being sent every 5 seconds as it interferes with the timing of the RMC messages sent every second...
  14. B

    Instability of 18M2

    I have recently started using the 18M2 but have had instability problems with it in that it appears to be constantly resetting itself. I have reduced my test circuit down to a single 1k resistor & LED on pin c.0 and the standard 10k/22k programming resistors. I've also placed a 0.1uF capacitor...
  15. B

    Installing PE 5.3.2

    Is it possible to load the latest Programming Editor on a Win 98 computer? The Picaxe web site suggests that it is (and can even be run under Win 95) but I've been unsuccessful with Win 98. I've run the Microsoft Installer Update (instmsia.exe) and then installed Bas805.exe which appeared to...
Top