This circuit can be used in a signal level indicator with LEDs. The circuit is from an Electronics Now dated January 1996. The power supply must be dual.
September 2017 - STMicroelectronics STBR3012-Y high voltage rectifier for automotive use is in...
The circuit is from an old documentation making use of an operational amplifier of the time. The...
We find this TTL configuration in a 1978s documentation. The circuit generates variable pulses...