Re: D/A converter info

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "gary_vincent_2001"
<gary_vincent_2001@y...> wrote:

>
>
> Hi guys, I am looking for a D/A converter to take mag pickup pulses
> and get back a proportional dc voltage. Anything like that out

there?

> tks gary

What you are describing is basically a tachometer circuit. How
linear and how accurate and how many pulse per second will determine
how/what you spend. A true D/A takes a digital "word" and gives you
a voltage level that corresponds but is not designed to take serial
pulses in and give you a voltage level. The process of doing that is
to use an 'integrator' circuit (simple op amp) but the trick starts
to become things like linearity and response time. One chip we use a
lot to take PWM in and output a porportional DC voltage is the LM2907
chip.

Tell us what you are trying to measure and we can give you a
suggested approach. If you are trying to measure position or speed
there are different solutions. If you are trying to control the
speed RPM of a cutter motor there are known solutions the group have
developed as well as some vendors.