Found in a Popular Electronics from the 90s, this game can be seen in other configurations on this site. The circuit uses components that are still common today.
Found in an English documentation, this circuit provides a 50 Hz signal according to the local...
Using an LDR as a sensor and an operational amplifier this circuit was found in the Encyclopedia of...
The XR2206 integrated circuit consists of a complete function generator. It is not a current...