LM3900 Inverter Trigger (CB25169E)

The figure shows how to implement an inverter trigger using the LM3900. The LM3900 is a NORTON operational amplifier. The source must be symmetrical.

Accented Metronome (CB4369E)
We found this circuit in an English magazine from 1976. The magazine no longer exists, but just...
Audio Frequency Meter (CB4867E)
This circuit was obtained in an old documentation, making use of an operational amplifier of the...
Triac and UJT Dimmer (CB857E)
This high power dimmer uses a unijunction transistor to trigger the triac. The triac is choosen...