We found this circuit in a 90's EDN. The circuit is based on a control integrated that is still common in these types of applications. The circuit uses a PROM.
This 600 W reducer uses SCRs and a switching system. The circuit is from Motorola's 1975...
We found in an old documentation how to use a 555 as a monostable key. The circuit should not be...
This circuit can be implemented with more modern operational amplifiers like the 741 and its...