Solar Frequency Standard (CB21951E)

This solar cell powered circuit generates a standard 100 kHz signal. The circuit is from a 1960 Gernsback documentation.

LM5176 Buck Boost Synchronous Controller - Texas Instruments
The Texas Instruments LM5178 Buck-boost controller is capable of operating in the 4.2 to 55 V (60...
Odometer (CB6334E)
This 1970 Philips circuit uses a mechanical counter. The circuit is triggered by a reed switch...
Oscillator with common drain (CB8057E)
This 1 MHz oscillator was found in an Electronics World of 1969. The circuit uses a...