This shunt voltage regulator was found in an Electronic Design from the 90's. The power transistor must be in accordance with the load current and must be equipped with a heat sink.
This circuit is from an old documentation. However, it can be mounted with modern equivalent...
In the figure we have the way to add hysteresis to an operational amplifier. The relationship...
This video game is another of the AY3 series with the AY3-3606 integrated circuit. The circuit was found...