Dec08 N&V Q&A - Blinking Lamp Schematic

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gatoruss
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Dec08 N&V Q&A - Blinking Lamp Schematic

Post by gatoruss » Tue Dec 16, 2008 4:32 am

I do not have a lot of experience with circuits, so forgive me if this is a stupid question :)

I have been reading thru the above material in the Dec08 N&V Q&A Section. The schematic appears to have C1 in parallel with R1 & R2. Is this correct?

Not knowing anything about how a 555 timer, I have been "googling" some to find materials that explain how the 555 timer works. Seems like the article uses the "astable" mode. Most (if not all) of the schematics I have found have C1 in series with the resistors, not in parallel. Seems that in the circuit in the article, C1 shorts?

Thanks for any help.

Russ

Bigglez
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Re: Dec08 N&V Q&A - Blinking Lamp Schematic

Post by Bigglez » Tue Dec 16, 2008 10:17 am

gatoruss wrote: I have been reading thru the above material in the Dec08 N&V Q&A Section. The schematic appears to have C1 in parallel with R1 & R2. Is this correct?
You have found a typo. The timing capacitor, C1,
should be returned to common (GND) from the
THR and TRG pins (and not the Vcc pin).
Image

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