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555 timer chips

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Info Freak | 19:16 Thu 05th May 2005 | How it Works
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Hi there. I have recently been using 555 timer chips in various different circuits and i was wondering if pin 5 is ever used. does any know if it is and if so wat is the circuit.

Thanks in advance

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Avatar Image fibifooz

Yes.  A signal on pin 5 will modulate the output waveform. (my husband is an Electronic Workshop Manager).

Find the data sheet here  www.itee.uq.edu.au/~walkerg/datasheets/lm555.pdf

23:50 Thu 05th May 2005
Avatar Image Tim Baxter
I would dispute this.  I appreciate that you're URL is good.  The circuit is a multivibrator which can (on its own) only give out a square wave varying between 0v & Vcc.  To modulate or vary the o/p waveform subsequent components have to be introduced.
02:51 Sat 07th May 2005

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