I'd like to propose a 'CO2 Click' board, if possible, using the MG-811 from Hanwei or something similar: http://hwsensor.b2bage.com/product-sensors/94592/mg811-co2-gas-sensor.html I suspect the Hawei sensor hasn't been done yet because it requires 6V @200mA for the heater, but I'm sure you clever ch...

Many thanks Dave, some sound advice. I think I'll try the external oscillator and Timer1 as a first attempt and if that doesn't prove to be low power enough then I'll move on to an external RTC chip. The DS1338 loks like a very useful device. I like the additional battery backed-up NVR, it could be ...

Also you might read up on the compiler #ifdef preprocessor functions. With a little extra work you can essentially make the same source code compile for either processor. Thanks Sparky. Can the #ifdef preprocessor functions be found in the relevant file in the 'Defs' folder of the compiler install?

Being new to Mikro C it seems as though many of the SFRs are labelled differently depending on the family of processor that you are using. I'm currently using a PIC18F45K22 and I'm rapidly running out or RAM. I was hoping to be able to 'upgrade' to the PIC18F45K80 as it has ~double the RAM in order ...

Hi Dave, many thanks for the detailed response. The information regarding calling functions from an interrupt is very useful. I'd always avoided doing this as I thought it would be better to set a flag and let the main routine handle the function so as not to tie-up the ISR, but I'll definitely give...

Hi All, I'm just getting started in PIC programming. I'm pretty comfortable with C but my embedded experience is limited as I'm more of a hardware engineer. I'm reading as much as I can but thought I'd solicit some advice from the board, so here goes: My application is as simple battery powered GPS ...