Found in Unitrode documentation, this oscillator uses some unusual components today such as PU and the 3 M potentiometer. The power can be made with voltages around 15 V.
This circuit was found in an Electronics Now of 1988. The circuit is still current, and the power...
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
This light meter can be mounted with equivalent integrated circuit. The power is made by a single...