Content for LM567

LM567

The LM567 and LM567C are general purpose tone decoders designed to provide a saturated transistor switch to ground when an input signal is present within the passband. The circuit consists of an | and Q detector driven by a voltage controlled oscillator which determines the center frequency of the decoder. External components are used to independently set center frequency, bandwidth and output delay.

Tin Can Phone Modem

“Here’s the popular “science experiment” of a phone made from tin cans and some kite string. This time instead of sending voice from one can to the other, data will be sent using a short beep for 0 and …