This circuit oscillates in the fifth harmonic of the crystal frequency. The circuit is from a 90's documentation. L1 must be according to the desired frequency.
May 2017 - The new Wolfspeed 650 V Schottky rectifier diodes can now be purchased from Mouser...
This 555 timed touch switch was found in a 90s Hands-On Electronics. It triggers a buzzer, but a...
We found this circuit in a Gernsback documentation from 1960. The circuit is intended for...