Found in a 1980s American documentation, this circuit uses programmable unijunction transistors of the time. The time interval obtained depends on the capacitors that can be changed.
In this circuit of 1987 the player has to briefly press one of the keys trying to hit which LED...
This circuit converts the 12 to 13.6 V of a battery into 6 Vwith current up to 1 A. We can use it...
We found this conventional version of a single-transistor oscillator in the January 1996 issue of...