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ConHam.org: Century-Old Tech at Hacker Cons
Sat 14 Jul 2018 05:05:46 PM PDT
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).
NE555 Astable Multivibrator Frequency and Duty Cycle Calculator
Tue 20 Mar 2018 01:48:35 AM PDT
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.
555 Timer Oscillator Frequency Calculator
Tue 20 Mar 2018 01:42:46 AM PDT
A simple webapp that calculates the resistor and capacitor values to make a 555 generate a signal of a particular frequency.
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