From time to time on this forum there are general questions about electronics. Take the "wire OR diode mixer" for combining serial signals for instance. I learnt about this sort of thing from books published 20 years ago (and now sadly out of print) but recently I came across a really nifty website that has all those tips and tricks:
http://www.play-hookey.com/digital/experiments/
Click on the "2 input diode OR" example on that page. Scroll down, and not only is there the circuit, but there is also a working breadboard example.
Check out some of the other diode logic circuits. Then the single transistor logic circuits. Then just go to the home page and randomly browse around.
Hey, maybe we could ask the author of the website to add the picaxe??!
http://www.play-hookey.com/digital/experiments/
Click on the "2 input diode OR" example on that page. Scroll down, and not only is there the circuit, but there is also a working breadboard example.
Check out some of the other diode logic circuits. Then the single transistor logic circuits. Then just go to the home page and randomly browse around.
Hey, maybe we could ask the author of the website to add the picaxe??!