Alt-BEAM Archive

Message #08035



To: "'beam@sgiblab.sgi.com'" beam@sgiblab.sgi.com
From: Wilf Rigter Wilf.Rigter@powertech.bc.ca
Date: Sun, 28 Nov 1999 14:47:47 -0800
Subject: [alt-beam] Re: PSHead Circuit Ver. 1.1


Hi Sparky,

The schematic was perhaps not clear on this but if there is a dot where two
schematic lines cross there should be a connection. If there is no dot,
there should not be a connection. Consequently there should not be a
connection between R2 and R3. Also, the middle terminal of the pot is the
wiper (moving contact) and in the case of R1, the middle terminal is only
connected to pin 17. BTW, the two LEDs shown in the original Ver1.1
schematic are also needed in this circuit not just for indication but also
for voltage regulation.

seeya

wilf

> -----Original Message-----
> From: SG [SMTP:Sparkyg@seark.net]
> Sent: Monday, November 29, 1999 1:26 PM
> To: beam@sgiblab.sgi.com
> Subject: PSHead Circuit Ver. 1.1
>
> hi folks!
> well, Darrell Johnson circuit is werkin fine with all the solar stuff off
> and switched to batteries,
> but i wanna move on and check out the improvments made.
>
> Wilf posted this circuit (ver 1.1) a while ago, I tried it and couldn't
> get it to work, but i think i was confused about the component layout.
> it originally had diodes that were connected to pin 3 and R2
> and to +
>
> i need to know if after removing them, do i still connect 3 to r2 as
> shown?
>
> and also on the trimpots....
> (forgive my ignorance here)
> does pin 17(r1) connect to
> 1. the middle pin on the pot or
> 2. to both the middle pin and to pin 15, or
> 3. to middle pin and the lead from the middle of the LDRs
>
> also if some one could clear up r2 for me...
> thanx!
> i think thats it! << File: psheadv1.1.jpg >>



8036 Mon, 29 Nov 1999 17:18:36 -0600 [alt-beam] Re: PSHead Circuit Ver. 1.1 beam@sgiblab.sgi.com SG At 02:47 PM 11/28/99 -0800, you wrote:
>Hi Sparky,
>... BTW, the two LEDs shown in the original Ver1.1
>schematic are also needed in this circuit not just for indication but also
>for voltage regulation.

AHHHH----HAAA!!

thats the problem!

Thanks for clearing that up!!!

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