From: Spehro Pefhany <speff@interlog.com>
To: Microcontroller discussion list - Public. <piclist@mit.edu>
Sender: "piclist-bounces@mit.edu" <piclist-bounces@mit.edu>
Date: Fri, 24 Sep 2021 15:16:12 -0700
Subject: Re: [EE] Generating a +/-10V signal
Thread-Topic: [EE] Generating a +/-10V signal
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At 04:17 PM 24-09-2021, you wrote:
>What's a simple way to get +/-10V from a=20
>microcontroller?=C2  This +/-10V signal will go=20
>into a motor driver, so it does not need to be=20
>precise. And it may even be a +/-5V signal, but=20
>the concept will stay the same. Cheers, -Neil.=20
>-- http://www.piclist.com/techref/piclist PIC/SX=20
>FAQ & list archive View/change your membership=20
>options at http://mailman.mit.edu/mailman/listinfo/piclist

Here is probably the simplest method if you you have +/- supplies available=
..

Ideally you'd have more than +/-10 to get +/-10=20
out (also allowing the  use of a cheaper
op-amp), but if you use a RR output op-amp you can get close.

https://i.imgur.com/2MekTq7.jpg

This uses the +5V supply to offset the output,=20
which makes sense if you're using
PWM from the 5V supply. If  you have precision=20
DAC with an independent reference
you'd want to use something better than the supply to offset.

Resistors are standard E96 1% values.

Best regards,
Spehro Pefhany =20


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