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 integrated circuit used in this 80's application is not common today. However, modern...
This circuit makes use of the Linear Technology LT6100. We find it in a 2005 company manual. The...
This General Electric circuit produces pulses of light only when light stops shining on the...