This circuit was found in a 1965 Electronic Design. Transistor Q2 must be load dependent. The circuit can be adjusted for currents from 1 to 10 A. The voltage drop is 3 V and the maximum voltage is 35 V.
This circuit activates a relay when the conducting bars (probes) are held by a person. The circuit is...
This circuit from the 70s uses an operational power amplifier from the time. The supply voltage must...
This circuit activates 5 LEDs according to the level of the analog input signal and can be used...