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In building Simple Bots, we are going to use a series of photo-coupled devices called modules. But, before we can do this, we need a good photo-couple...
You will need: (x1) OSRAM-brand photo transistor (x1) NPN transistor
Lay the phototransistor atop the NPN transistor such that the base of the NPN transistor aligns with the emitter (longer leg) of the phototransistor ...
Twist together each lined-up pair of NPN transistor and phototransistor leads.
Solder together the connections of each twisted pair of transistor leads.
Trim the middle pair of wires such that it is shorter, but the connection between the base of the NPN transistor and the emitter of the phototransist...
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