We found this configuration in a 1990 Poptronics. The circuit can be powered by voltages between 6 and 15 V, changing the resistors in series with the LED. The frequency is set at R7.
In the figure we have a current source whose intensity is given by the formula next to the...
We found this ladder-shaped signal generator circuit in Radio Electronics magazine from August 1966....
This circuit, unlike the previous one (CIR12983) has the values of the components. The operational admits...