Step 6: Body Wiring
The mnemonic I use is that getting 'less lead' is a negative thing, hence it's the cathode. Getting more lead is a positive thing, so it's the anode. All of the LED's on the body will have their cathodes (short leads) connected together, in a chain. At the end of the chain, add a foot or so of hookup wire, this will eventually connect back to the R/C Animator;
The LED's don't share anodes, though. Connect hookup wire to each anode separately. Start at the end of the chain, twisting the wires together as you add each LED;
If you're connecting four LED's you'll have five wires;
- one wire that's connected to the long lead (cathode) of all the LED's.
- four wires that each connect to the short lead (anode) of a single LED.
It doesn't matter what position the other wires are in, you can even skip a pin if you'd like. But make sure the shared cathode wire is on the rightmost position. This is a pretty weak connector, I suggest re-enforcing it with some hot glue.
Here's the circuit, too;