Safety circuit (CB8187E)

Pressure switches are used in this circuit that quickly turns off the supply of a load if necessary. The circuit is from a 90s Popular Electronics.

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4047 Astable (CB13027E)
In the circuit of the figure we have the production of rectangular signals of frequencies up to...
Safety circuit (CB8187E)
Pressure switches are used in this circuit that quickly turns off the supply of a load if...
Mixer (CB24020E)
This small general-purpose mixer uses only two transistors. We found it in a Radio Electronics issue from...