This circuit is from a 1966 publication. The frequency depends on the capacitors and on R1 which can have values between 47k and 2.2 M typically. The supply voltage can be between 200 and 300 V.
This circuit converts a constant input current intensity into a voltage given by Vo = -R x I. T1...
In this circuit the output voltage depends on the light that falls on the LDR, decreasing when the...
) This is the original application of the National Semiconductor LM3909 low consumption pulsator. The LED...