This oscillator uses a crystal to set the frequency. The operating limit of the unijunction is in the order of 100 kHz. Power supply can be between 10 and 20V.
This circuit was obtained in a magazine Hands-On Electronics of June 1987. It is a circuit that...
The purpose of this circuit found in an old Elektor is to light a lower power lamp when the bigger...
Found in a 90s Popular Electronics, this circuit uses two PLL tone recognizers to trigger by touch an...