This game was found in an old Popular Electronics. The unijunction transistor can be 2N2646. The supply can be done with voltages from 6 to 12 V.
This micropower inverter serves to obtain high voltages with very low current from direct current...
We found this circuit in an American publication from the 80's translated into Portuguese. The...
This circuit is from 1976 documentation, but it can be assembled with more modern transistors like...