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Hi! I need your help. Could someone smarter than me please check that this could work before I order the parts? I would like to build a miniature altimeter based on the BMP180 sensor. It would be connected to an android phone and basically send the raw data through a bluetooth module (so no need...

I must say I don't understand your question. What you see is the full circuit. You are right, two darlington channels (2 and 3) are controlled directly from two picaxe pins and the channels 1 and 4 are simple inversions of the 2 and 3 by the use of spare transistors 6 and 7 as inverters. What...

Note to the Picaxe forum members: I link here from a few other (non-electronics) forums so I explain some things you already know. Just skip that bits. I love macro photography and as anyone who has ever tried it will know, extremely thin depth of field (here we are often talking about 0.1mm...

I have finally received an inexpensive touchscreen from DX (http://www.dealextreme.com/details.dx/sku.20654) and I am ready to start experimenting. The theory seems simple enough and there is a good tutorial...

help with the 74hc164 LCD driver [solved] It's me again :) My last shit register troubles were, it turns out, really caused by a faulty breadboard. As the ultimate goal was to make a 3-wire LCD interface using a shift register I have now moved on to 74hc164 (8-bit shift-register) and made a...

Hi! I am trying (and failing) to make my first shift register (74hc595) work. I've used a circuit on this page to connect it to my 20X2: http://www.arduino.cc/en/Tutorial/ShiftOut I think I've correctly connected it: RCK to C.0 (clock) RSCK to C.1 (latch) SER to C.2 (data) QA,QB and QC are...

I have just finished my first picaxe project! This is something I always wanted but didn't think I'll ever be able to put it together (that was before I learned about picaxe). http://www.youtube.com/watch?v=2osloXHi6eE The hardest part was making the 08M-based 'circuit' small enough to fit...

Hi! I'm new to both this forum and picaxe. I am trying to interface a 08M with a few push-buttons used as input of some other (unknown) microcontroler. I have measured the voltage over the button contacts to be 3.15V. I am guessing that I could always use a transistor connected to one of the...