3 results
tagged
frequency
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If you're at a security conference, and you've got a ham radio license (of any class), grab your radio and set it to 146.580 simplex (no offset).
A website that takes a parrticular frequency (in KHz) and a duty cycle (at least 50%, or on half the time, off half the time) and calculates the values of the two resistors and the capacitor required to generate that frequency using a 555 IC.
A simple webapp that calculates the resistor and capacitor values to make a 555 generate a signal of a particular frequency.