Re: [CAD_CAM_EDM_DRO] Need Encoder Hookup Help

On Sun Nov 25 14:09:22 2001, Bob Bachman, <bobach@...> wrote:

>OK you techy types, help me out.
>
>I have a coule of Red Lion counters which will make dandy readouts
>for a DRO. I also have some of the famous Goldmine motors with attached
>encoders.
>
>The problem: The encoders are 5 volts and the counters are 12 volts.
>The 5 volt outputs from the encoder will not trigger the 12 volt logic
>of the counter. I need a simple circuit that will use the 5v pulses
>from the encoder to create 12v pulses for the counter.
>
>Thanks,
>
>Bob Bachman
>
>"It's our choices that show what we truly are,
>far more than our abilities" - A. Dumbledore

You could try this:

O +12V
|
/
\ 20K ohms
/
\ CMOS inverters run at 12 Volts.
.01 | |\ |\
5V---||------+----------| >O---| >O-----to counter
sig in | |/ |/
/
\
/ 20K ohms
\
/
\
|
_____
___
o

Use open collector TTL inverters if you need speed. They need a pull up
resistor on the output, too, but will probably work without the input side
components shown above

Bill

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