This circuit is valid for other comparators of the same series. In this case, a lamp is excited, but an LED can be used in series with a resistor or other load. The transistor admits equivalent.
This symmetric 30 mA x 15 V power supply was found in the Ferranti transistor manual from 1974....
We found this probe circuit for frequency meters up to 10 MHz with a sensitivity of 10 mV, which...
This circuit is from a cookbook to timers. The circuit is triggered by an external signal and,...