This adjustable frequency circuit was found in December 1986, Radio Electronics magazine. The base frequency is given by C1 and the power supply must be 5 V.
Based on common components, this circuit was found in an English publication. The circuit is...
We found this precise crystal oscillator for the 144 MHz band, depending on the crystal used. The...
E) This soft start dimmer was found in a Motorola documentation from 1968. However, it can be...