OK, for my two chip design I burned these two programs:
picaxe8m #1
===
high 1
pause 50
low 1
main:
if pin3=1 then pulse
goto main
pulse:
'pmwout 2,66,133
high 2
pause 1000
low 2
high 1
pause 50
low 1
goto main
picaxe08m #2
===
main:
if pin3=1 then pulse
goto main
pulse:
'pmwout 2,66,133
high 2
pause 1000
low 2
high 1
pause 50
low 1
goto main
I commented out the pwm to make it easier to test.
Chip #1 was left in it's usual position on my common breadboard setup.
Chip #2 went beneath it, and I hooked up the power from the same supply.
As you might guess from looking at the code, I hooked up the Out1 of both chips to the In3 of the other chip. I have no idea how quickly the chips can read inputs, so I just gave them 50 ms, since it doesn't matter at .5 Hz.
This all works perfectly.
Naturally, before I go sticking something on my head, I like to do a little testing. I took the left output wire and right output wire, and tested the voltage. It bounced nicely from 5.0 to -5.0 volts.
Being the great electronics genius that I am, I went back to my book and revisted Ohm's Law. According to my calculations, I needed a 5k Ohm resistor to get my 1 mA. This worked when I was using two outputs from a single chip. It doesn't work now.
Now the amps sort of jump around, mostly hitting 1.5 mA and -1.5 mA, but going 1.8, 1.9, and occasionally over my 2 mA range. Because of this, I am not comfortable applying it to my brain just yet.
Why is the voltage stable while the amperage is not? Surely I've done something dumb.
I don't really know how to draw circuits, so I will just explain it:
The normal breadboard setup.
An extra picaxe08m, receiving power off of the same rails.
Each chip with a wire from Out1 to In3 of the other chip.
Each chip with a 5k Ohm on the Out2, and then a wire.
