This circuit, which generates a linear sawtooth signal, can be used in a frequency-band oscilloscope. The circuit was found in the December 1992 issue of Radio Electronics magazine.
With this circuit it is possible to control the frequency of a 555 astable, given by C1 and R1...
This small pulse receiver had its construction described in a Radio Electronics magazine from...
We found the circuit of this Japanese transistorized commercial receiver in a documentation from...