average volts to dc

Use a d'Arsonval meter. No electronics or power supply is necessary.

Bill

-- Fermez le Bush--less than 18 months to go.

Use a low pass filter and put the PWM frequency far over the filter's cut-off frequency. (Remove the two Roentgen-ray characters to reply.)

The low pass filter (e.g. resistor-capacitor) is the obvious first answer, but how about also requiring a fast response time?

Now I'm thinking maybe a switched integrator. Any other ideas?

dave y.

As others have suggested, there are analogue methods of averaging, using mechanical, electrical or thermal techniques.

However, as this is presumably a fixed amplitude signal, simple digital techniques are also available using the timing of the edges of the signal.

I won't mention the device-type of choice, as (1) everyone knows what it is and (2) some go spare just at the mention of the acronym.

It will have many advantages - including that of a much faster response time than any analogue system - as it will produce a valid output almost immediately after the first pulse has been registered. However, it will, of course, produce a quantised output signal which may need analogue techniques to reduce the transient component.. ;)