MOSFET Switches (CB21260E)

These are drive circuit using power MOSFETs. We found it in a Popular Electronics from the 90s.

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MOSFETs SuperFET III (COM034E)
It can be obtained from Mouser Electronics new superFETs III from Fairchild for voltages of 700 V...
RS Flip Flop (CB8925E)
This circuit was found in a 1969s American documentation. With modern components, it can be used...
Changing the frequency of the LED blinking (CB24661E)
The figure shows how to change the frequency of a 5 V LED blinking. The capacitor can have other...