This circuit, found in a 1958 magazine, is for reference only, since the components are not easy to find today. The transistors are germanium types and power supply is made by common cells.
Other CMOS gates can be used in this sensor, which we found in the July 1995 Electronic Now...
This power supply is not protected from shorts in the output. Output voltage is given by the...
This circuit came out in a publication called Electronics Handbook of 1993. Q1 can be a 2N2222 or even...