This is a circuit elements library, which includes the following models:
breadboard, generic resistor, LED, generic chip (op-amp, logic gate, etc), bread-board wires, voltage source wires, and alligator clips.
Everything is properly rigged with IK's and so forth, so it easy to place and position ciruit setups. Included is a sample setup for an LED driver where the armature constrols how much light is emitted (though if all LED's have the same material, this control will affect them all so in most cases keyframing the value in the node editor is better).
Finally, I've included a second blend file which shows an example of a circuit setup of a 5-input and-gate.
Here is a link to a larger resolution of the thumbnail [with very mild compositing]. Finally, it's CC0 so do what you want!
~Patrick W. Crawford