The simple touching switch

Published:2011/7/2 3:27:00 Author:Borg | Keyword: simple touching switch | From:SeekIC

In experiments, the writer found that the single-way SCR (MCR100-8) control pole can be conducted by hand touch without any forward voltage. Therefore, the writer designed a simple touching switch, whose circuit is shown in the figure. Just by touching the metal chip, SCR1 is conducting, so the load is getting power and working; by touching the metal chip, the switch is off and SCR2 is conducting, the relay 1 is getting power and working, K is cut off, the load loses power, after SCR2 is broken down, the capacitor is discharging power to relay J, which keeps the relay close about 4s.



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