This circuit was found in a documentation of the 80s, having didactic purpose. For R1 values between 10k to 1M can be used. Transistors are general purpose types.
This circuit is from 2001 documentation and consists of a small FM transmitter with two inputs, one...
This amplifier, of excellent quality, provides a power of 40 W IHF, or 22 W RMS, in a load of 8...
The input of this regulator can be between 7 and 12 V and the output is 5 V. The circuit is from...