Problem: Connection pin for the IC4066 (IC4)

[quink_]

Hallo,
in the schematic .pdf by Carl is no info about the connection pin / power to the IC4066 (in the schematic called IC4).

Pin 14 (VDD) go to +5V, but Pin 7 (VSS) go to -5V or to 0V ???

On:
http://www.datasheetcatalog.com/catalog/p128360.shtml
is the Datashield of the IC4066 (HCF4066)

Where go the Pin 7 (VSS) of IC4066, to -5V or to 0V ?

thank for help,

[chemelec]

More Info Here:

http://www3.telus.net/chemelec/Bandido/Bandido.htm

It goes to the -5 Volts

[quink_]

Hallo chemelec,
i have doubt. On your site i found the:
"Here is a Better Overlay from Peter in a GIF File"

http://www3.telus.net/chemelec/Bandi...From_Peter.gif

When i look to IC4 and pin7 (i think is the pin down left), this pin7 go with a bridge to the lowest conductor path. And this lowest conductor path go (on left side) to the IC7. And IC7 is in Carls Orginal Schematic contact with -0V !!

What do you think about ?

[chemelec]

Well, On the Circuit I Built, I used the -5 supply. It worked fine.

However I guess the choice is yours.
Gary

[quink]

Hallo,
when you use the:
"Here is a Better Overlay from Peter in a GIF File"

http://www3.telus.net/chemelec/Band..._From_Peter.gif

from yours side you use 0V !!! (I think):

When i look to IC4 and pin7 (i think is the pin down left), this pin7 go with a bridge to the lowest conductor path. And this lowest conductor path go (on left side) to the IC7. And IC7 is in Carls Orginal Schematic contact with -0V !!

What you say now ?
You are sure that your pin7 of the IC4 go to -5V ?

[Carl-NC]

Pin 7 should go to -5v, not 0v.

- Carl

[quink]

Hallo Carl,

thanks for answer, but
when you look here to the datasheed of this IC4 (4066):

http://www.datasheetcatalog.com/catalog/p128360.shtml

you see, that the Pin7 is not a output-pin, its a 0V pin (i think)
(or its a error in the orginal bandidoII from tesoro ?)


When you look to the PCB-Layout from chemelec (he say he build a funktionary bandidioII):

http://www3.telus.net/chemelec/Band..._From_Peter.gif

you see that Pin7 (IC4) go to 0V !!!


please verify the pin7 of the IC4 (4066) in the Datasheet and in your layout and write your opinion


big greets,

[Carl-NC]

From the layout on Gary's site, pin 7 goes to -V, not 0v. And that's how it should be in this design... the signals applied to the switches are bipolar, and if you ground pin 7 then the switches will be off during negative signal swings.

- Carl

[quink]

Its ok Carl, i biuld the schematic with -5V and +5V on the IC4.
Thankx

[Sean Goddard]

Connecting the VSS pin (7) to -5V allows a bipolar swing in the output to the following Op-Amps. Without this configuration the machine will work, but with errors in GEB and Disc.

[Unregistered]

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hi carl i want pcb and schemetic this device can you help me
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[rajesh]

t/r

hi carl i want pcb and schemetic tf 900 can you help me
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[Qiaozhi]

hi carl i want pcb and schemetic tf 900 can you help me
Discovery Electronics New Two Box style Treasure Cache and Cave Locator ...

Hi Rajesh,

You are asking this question in the wrong forum. This place is dedicated to the Tesoro Bandido and Silver Sabre detectors. You should post your request in the Schematics forum.

[rajesh]

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