2 nd session of R&A. Transistors & couplers. Agenda. Transistors as switch. Transistor testing. Opt couplers. Relays. Simulation with Proteus 7 professional program. Transistor working theory. Consist of two diodes back to back.
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Transistors & couplers
LED (light-emitting diode) and an optical receiver such
As phototransistor or light-triggered diac . The two are
separated by a transparent barrier which blocks any
electrical current flow between the two, but does allow
The passage of light.
Proteus 7 Program