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| simple circuit to control DC motor on/off |
| This a simple circuit that use to turn on/off 12V DC motor with TTL control signal input. The BD139 should instal with heat sink.  Light flasher circuit Elenco 9440 Breadboard With JW-350 Jumper Wire Set 
Extech EX330 Mini Multimeter with Built In Thermometer 
-------------------------------------------------------------------- PC817 data sheet Data sheet in pdf file format. This is a op-to from Sharp semiconductors. BD139 data sheet Data sheet in pdf file format. This is a transistor from Philips semiconductors. |
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