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[DPRG] A Simple PWM Circuit Based on the 555 Timer notice

Subject: [DPRG] A Simple PWM Circuit Based on the 555 Timer notice
From: Triffid Hunter triffid_hunter at funkmunch.net
Date: Sat May 26 03:40:11 CDT 2007


On Thu, 24 May 2007, Gmail wrote:

> Hello, I think that there is a mistake in "The schematic diagram for the 555 
> PWM Circuit:" on http://www.dprg.org/tutorials/2005-11a/ page, the DISCHARGE 
> pin 7 is connected to output and output pin 3 is connected to charge and 
> discharge circuitry.

ok, so where's the mistake? I see nothing wrong with the circuit.

The only problem I see is that it says discharge shorts to ground when 
output is high, when in fact it shorts to ground when output is low - but 
this is an error in the pin description, not the circuit.

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