Transistorized Bragraph (CB7009E)

This circuit was found in 80's Popular Electronics. The components used are common and the number of indication channels (LEDs) can be changed.

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Low Pass Filter (CB5198E)
This circuit uses only passive components calculated for the desired frequency. We found it in an...
Automatic Protection Power Source (CB15847E)
This circuit supplies voltages from 6 to 18 V with a maximum current of 2 A. We found it in a...
Operational Basic Servomotor (CB19499E)
This is the basic circuit of a servomotor found in a manual of linear integrated circuits from the...