Recent content by dsa

I cannot find a solution for all unique PQRSTUVWX :frown:

OK, this one is better:wink:

so how do you arrive at this number ?

The range required is max of 50' Noise can be RF welders, motors etc.. The current solution has a frquency of 300MHZ i believe. There is no PC or USB present. The transmitter is oviously a hand held gizmo and the receiver is powered by 24V and the output basically closes a 24V relay coil

Anyone have a good source for a wireless transmitter/receiver package. We have been using an off the shelf set for one of our products at work from Linear Corp. This one is similar to a really old garage door opener technology. We have been having problems with range and interference...

a little late but you may want to look into isolation amplifiers google iso124 I don't have enough posts to post a direct link::rolleyes:

:confused:

Somewhat... I do not really care about super exact calculations, I know roughly what the times are from experimentations. I am just trying to come up with a general formula for V(t) across the cap.

Berkeman, this is not a homework question, but part of a design for a circuit I am doing at work. I understand all of the above mentioned, I was tryin to isolate my problem area. I am trying to come up with an equation to determine how long it will take to charge the capacitor up to a...

I am trying to figure out how to come up with an equation to calculate the voltage across a capacitor for an RC circuit that is supplied by a chopped / full-wave rectified ac waveform shown below. The shaded portion is the actual input signal to the RC circuit. anybody have any ideas ?