We found this circuit in a 1968 Electronics World. The transistors are from the era and information about the transformer was included. Transistors support current equivalents.
This circuit allows coupling optical signals to a TTL input with excellent performance. Among the...
June 2017 - The new power projection LEDs OSTAR projection from OSRAM can now be obtained from...
This well-crafted speed game setup for two competitors was found in a 1998 Poptronics. The circuit...