The circuit shown was found in Intersil documentation from the 90s. The formula allows to calculate the voltage obtained as a function of the values of the resistors.
This circuit was obtained from an English magazine from 1977. The magazine no longer exists, but...
The two damped oscillators shown can be adjusted to generate the drum sound when we touch the...
Timings of up to 10 hours, depending on the capacitor used, can be obtained with this circuit that...