Using the M1575 this switching converter was found in National Semiconductor documentation from the 90s. The circuit has a maximum output current of 1 A.
This General Electric circuit is from the 80's. The PUTs used in this meter are not common...
This circuit provides a power of the order of 2 W, characterized by high performance. The output...
The sensor can be made using two bare wire or two screen with a piece of tisse between them. One...