His recent video shows a crystal oscillator with a “watch crystal” and a CMOS counter, the CD4060. Using such a circuit can produce very stable frequencies and since the 32.768 kHz crystal is ...

An AM transmitter is simple enough, in this case an oscillator and buffer driving a class C power amplifier. The modulation is applied by a transistor in series with the power amp, driven from an ...

The oscillator circuit is designed to drive a parallel resonance AT cut crystal with a certain drive level; this drive level is dependent by the ESR parameter. If a crystal is specified for a lower ...