I am new in this forum but I start building the ultrasonic radar circuit for my house entrance, but i got stuck with a couple of questions such as: 1. TR1 is a BC547 or BC548 ?? 2. Can I put a buzzer in serial with the colector of TR1, because the relay was not indicated in the circuit i have.
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can anyone help me connect this circuit
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Hi Gurus
I am new in this forum but I start building the ultrasonic radar circuit for my house entrance, but i got stuck with a couple of questions such as:
1. TR1 is a BC547 or BC548 ??
2. Can I put a buzzer in serial with the colector of TR1, because the relay was not indicated in the circuit i have.
Relay details could be find..
Thanks for the help