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Good idea. I will have a look at what you wrote and FYI on standard motor we use is a Baldor Catalog # CM7014-50. Thanks for the help!

I have a question for the NEC gurus here... We have an application where we use .5 and 1HP motors. They are controlled by 3-Phase CRYDOM relays. We provide the customer with pigtail connections to the relay where they will hook up their 3-phase, 3-wire power when the unit is installed. I was...

sreid, Yes, that is what I am doing at the moment and it seems to be functioning correctly now. Once it reaches steady state everything looks great.

I don't know if subtracting one SM resistor from a simple RC passive filter and going to just a blocking cap makes it MUCH simpler but I think I would need an extremely large value for the cap at 10Hz to 10kHz, wouldn't I?

I've got to admit guys...I feel like an idiot now! :~/ I was simulating the circuit and was basically looking at the output prior to the capacitor charging up! The 10Hz high pass filter works great - when you let the cap charge up! LOL Sorry for the wild goose chase, I'm sure I'll be back...

Since my input signal frequency is 10Hz to 10kHz wouldn't this require an extremely large value for the cap to ensure the frequency response I am looking for?

I am redesigning an oddball signal conditioner and I need a little help. Does anyone know of any method to reliably remove DC offset from the input signal? The overall idea of the circuit is to take an input waveform, remove the noise, and output a standard 0-5V TTL square wave of the same...

I just have a general question but I decided to post the reply on this thread because it involves this circuit specifically. This is probably also a silly question but this is the first analog circuit and really even the only one with op-amps that ive worked on since my 1st year in school...

The main point of this circuit is to take a noisy signal (sine or square wave only) from a noisy source and varying amplitude, clean out the noise and convert it to dual TTL logic levels for output to another device. The Schmitt Trigger part of this circuit is merely used to clean the ripple...

DOH!! Proves I'm a newbie! :) Thanks much for pointing out the obvious to me. Learning every day. Thanks again Lewish I guess its back to componenet selection now....

<Cross posted in Comm & Signal forum> All, I am a newbie Electronics Engineer and am working on my first circuit. It is a simple signal conditioner which is just designed to take an input signal (square or sin wave, 50mV to 10V & 10Hz to 20kHz), clean it up and then output it via a RS-485...