This untuned circuit uses one of the world's first commercial transistors, the CK722, having been found in a 1966 publication. Equivalent modern types can be used.
The simple optical intercom we show is from a 1995 documentation. The LEDs can be infrared or...
We found this simple roulette with the 4017 in a 1995 documentation. The circuit is of a very...
This circuit for discharging NiCad batteries limits the current to a value that can be adjusted in the...