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Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

ultrasonic switch circuits

ione11

New Member
i want ask obout ultrasonic receiver switchs cicrcuits. what is the function ic 3140? and i search sl 100 transistor but i not found it. can you help me to find transistor type to change the sl 100 transistor?
 
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