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Firstly, apologies for the delay. Been very busy with other commitments and university starting again. Still working on this power supply design, thanks for the continued feedback. Here is a newer revision (apologies, it looks very "busy", but the colours help me understand it). It hopefully...

Hello all, Thank you for the responses, haven’t forgotten about this thread, just haven’t had enough time recently. I am going through all replies slowly to ensure I don’t miss anything. Clarification: I am familiar with electronics, but literally just for working with micro controllers and...

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Hi, I have been designing and prototyping a more reliable power supply for a project and have added in fuses to try isolate key areas to minimise the risk of overcurrent from any of the sub-circuits burning the entire thing out. I hope so anyway. Is there any way I can use a Picaxe pin to...

Hello all, I'm currently in the process of rebuilding an alarm panel originally built with Picaxe chips. The power supply is one major area that I want to improve/get right this time. I am feeding the entire project from a 48v 5A DC power supply. The alarm system is broken down in to...

Hi everyone, I have posted before (here) about a 2 wire power+data loop system, I wasn’t really satisfied with “SerialPower”. The fire detection system I started work on years back was on hold due to many other important things I had to focus on, but now I am getting more time I want to make...

Hi everyone, First and foremost- I don't want to start any arguments nor am I endorsing any products. I am an end user of Picaxe. In a lot of threads I've read about the limitations of what Picaxe can do, ultimately due to the firmware or the physical limitations of the hardware. For...

Hi, I am currently trying to devise a communication loop between a Picaxe master and x amount of MCU slaves (tested with 6 so far). The master sends data to each slave in turn and the slave will return data back. I have 2 wires for the serial in/out and 2 for the 24v power supply to power the...

Hi everyone, In my project I currently use a looped pwmout command to drive a piezo. The main Picaxe 40X2 has lots of blocking commands to drive displays and other Picaxe chips. So to solely produce the sound I used a spare 14M2, which waited for specific serial commands from the main Picaxe...

Hi everyone, Been doing some searching all morning and can't find a definite answer. So I am building an alarm system. One PICAXE chip (40X2) acts as the main brains which is used on the control panel, all configuration data/settings for my system are stored in a 24LC512 EEPROM. I also have...

Amplify a Picaxe PWM signal without distorting data Hello, This question is a little off-topic. It's regarding the Meterbus (M-Bus) protocol. I have a couple of alarm sounders that use this protocol to communicate and be controlled by a master (usually a compatible control panel). What I'm...

Hello all, I have developed my own PC based EEPROM programmer which handles a text file full of the actual data. The problem is, when my PC application sends the address for the hi2cin command, it is about 5 characters long (i.e - 28032) and keeps getting stored as a string in the scratchpad...

Hello all, Almost reaching the end of the hardware and basic software development for the alarm system I am still building. My question is in relation to the control panel, namely the 22 LEDs for visual indication. There are 16 zone LEDs, 1 power LED, 1 Fire LED, 1 Fault LED, 1 Disablement...

Hello, Whilst some users may or may not agree, I personally find the iOS app for Picaxe Forum horrendous. I genuinely think it should just be scrapped, it's not user friendly, looks awful and must be expensive to maintain. You can't even view an attached photo without pressing the post and then...

PICAXE to listen for a CO sensor to activate Hello all, Going a little off tangent from the main alarm system I'm building- I was just wondering how I would go about creating a circuit that could "listen out" for my carbon monoxide sensor to activate? Basically when this circuit hears my CO...

Apologies for the delay everyone... Below is the code: ;##########################################################;######## Serial download and uploading to eeprom ######### ;########################################################## #no_table #picaxe40x2 #terminal 9600 setfreq m8 hsersetup...

Hi there, I've been trying to find an efficient way to fill my 24LC512 EEPROM. After trying to write just 126 pages (roughly) of 128 characters I've been getting a compiler error saying 'memory full'. Obviously I don't want to have to use seven or eight different programming files in order to...

I seem to be having far too much difficulty with the use of Hserin on a 20X2. Firstly, I am unable to use the hserout as a normal i/o pin because my 6-8 month old picaxe can't handle it. That's fine, I can manage. However, I am unable to receive any data through the Hserin pin (pin B.6). I can...

Hi there, Still working on my fire alarm system. Hit a wall with the core "Sound Alarms" function. Basically I am wanting to activate a beeping sound every 200ms when the "Sound Alarms" hex value is received by my picaxe. I've successfully made a loop to repeat the buzzer sound but I am...

Hi everyone, Probably my first 'positive' post about my progress with the alarm system I am building...! I am now up to the stage where I need to create the menu structure for my LCD menu... I've been researching for over a week and cannot seem to even get an idea of how to create the hierarchy...