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Hi folks, Working on my first project involving TWO i2c devices. One is the DS1307 clock and the other is an LCD display driver chip from ByVac. Both individually work fine, but when I try to use both, the display appears to keep being 'reset'. I can tell it gets reset since it displays a...

Not strictly a picaxe project as yet, but I need a solid state circuit that will switch on a 5v supply if the 240VAC it is monitoring goes down. I have a situation where there are a number of 240V feeds from separate trips and want to detect/alert if any of them trip. There are several trips I...

For my next little project I'm going to use a 28X pic and I'm thinking of using the AXE020 28 Pin project board since it has the ULN2803 on board, ribbon cable headers on board and allows enough I/O pins to suit. Is this board compatible with the 28X? Will I be able to connect a couple of...

This is more of a 'mechanical' question about the torque available in a stepper motor, I hope someone can help a little. A while ago I created a 'dosing' pump using a timeswitch as a cam driver for a syringe with an arrangement of one-way valves so that on one half of the rotation it filled the...

I've only dabbled a little with i2c, but my current project looks like I'm going to have to split the code into two parts and run 'control processing' and 'ui processing' on a separate chips. This actually suits me since I can mount the 'ui display & keypad' separate from the other parts. The...

I'm working on a project that will probably end up on a 20x1 or 40x1 which is currently using some of the eeprom to store data over a period of time. It doesn't accumulate data, the volume of data is fixed, it just changes over time and easily fits within the 256 bytes available. I would like...

I'm writing my first large app (> 1000 lines), and you really notice some weak points in the editor. So, who writes it? Is it likely that they will acknowledge any suggestions? Whats the best way to bring any suggestions to their attention? Probably because I'm use to working with Microsofts'...

Not really sure where to ask, but I'm wondering if anyone can recommend a surface mount equivilent to the BCX38C device? Chris

Whats the best way to drive a relay that has a 240V coil from a pic? I was thinking of triac and triac driver, but somehow that seems overkill. Would I need a diode across the coil? Cheers! Chris

Hi folks, I've got one of the 'picaxe experimenter boards' with the 18X chip and things generally seem to work well. However, I'm trying, for the first time, to communicate using the i2c with an lcd driver chip and I can't seem to get it to work! The driver chip is not responding to any of my...