We all like to make transmitters.Most of guys sent emails to Free Circuit Diagrams 4U asking simple transmitter circuit diagrams .I suppose this would be the best answer for that.The special thing of this circuit is this circuit runs with one transistor.This circuit can be operated with 3V power supply.Here we have used 2N2222 transistor. you can make the coil winding 5 turns of 24AWG wire on a 1cm plastic former.You can send signals up to 5oM in open space.
Note:
#Build this circuit on a PCB
# Don't supply over 3V
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