This circuit was found in the November 1974 Radio Electronics magazine. The voltage depends on the supply and the timings of R1 and R2 as well as C1 and C2.
Originally intended to detect EMPs produced by tests or atomic blasts, this interesting circuit...
This circuit triggers a small water pump when the humidity detected by the sensor is reduced in a...
This circuit was found in Maxim's documentation from the 90's. The configuration uses components...