This configuration can be applied to other operational amplifiers to increase the current capacity. The circuit is from the 80s. The transistors used are from that time.
This circuit was obtained in a technical publication from the 1970s. It fires a diac and thus a...
This circuit has a very high input resistance to excite a 0-1 mA indicator instrument. The FET...
With this circuit it is possible to use a common hair dryer as a hand dryer. The circuit is timed...