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Low-cost Touch Sensitive Switch

Low-cost Touch Sensitive Switch

ONOFF12V/60mAT1Figure 1 : Circuit Diagram of Low-Cost Touch Sensitive SwitchR2R1R3T2R4R5T3T4T1T5D1RL1R6R7R9Low-cost Touch Sensitive Switch
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publish time: 2020-10-26
Circuit Everyday

When experimenting with high-gain transistors, you may notice that the transistor becomes saturated just by touching its base.This is based on the idea of a single low-cost touch switch.The 50Hz hum in the human body is the key to this circuit.

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