Re: looking for a 555 timer circuit

On 30 Jan 2006 11:35:17 -0800, "Wayne" <waynelewis@xxxxxxxxx> wrote:

>I couldn't find the data*** for the 4060 I have: The number on the
>chip is SCL4060BE with a picture of a cube with 'S' on each side of the
>cube.

---
OK, here's a link to the data *** I used:

http://www.semiconductors.philips.com/acrobat_download/datasheets/74HC_HCT4060_CNV_2.pdf

and a link to the final schematic:

news://d7vst11cbgr3d26pa13hh5olvbk505m664@xxxxxxx

If everything works like it should, whenever you power up or hit the
PAUSE switch, U3Q1, Q2, and Q3 should go low and stay low until U1-3
goes low. That should be about 30 minutes with the pot set at
mid-range. During that time, U2-10 should be low, U2-4 should be
high, and the outputs of U10 should be toggling, with U1-7
exhibiting a period of 4 seconds (two seconds high and two seconds
low).

When U1-3 goes high, the reset will be taken off of U3, and 30
seconds later its 3 phase output cycle will begin with U3-2 going
high.

--
John Fields
Professional Circuit Designer
.

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