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Thanks, those look they'll work great. I have been doing some research on string potentiometers and have found a few but the cheapest is around $250.00 Does anyone here know of something that could work the same but for cheaper? Maybe someone even has a better idea. I'm trying to convert a...

Hello again, I am still working on the circuit and it's going well, thanks to all your suggestions. I was wondering too if you guys might know of a place that I could find a cheap digital panel meter that will display an output in percentage based on an input of 1-5 vdc? I have found some but...

Skogsgurra How do I use the potentiometers in any other way?

Sorry, I will give an explanation. Purpose: to provide a 1-5 vdc output indicating an arm position As R_load changes in resistance (indicating a change in direction of an arm) there is an increase in voltage to INPUT. INPUT provides a voltage to the GAIN circuit which multiplies the INPUT...

Thanks for parts suggestions. Here is the picture:

Hello it's me again. I have sat down and designed what I want and from what I can tell it works well. I built the circuit in a simulator and it runs as I would like. I am wondering though. How do you know what parts to buy to make it? There are 1000's of different types of op-amps and it seems...

Well... Thanks a lot for everyones help. I just really like playing with this stuff but unfortunately I'm not too good at it yet. It doesn't seem to want to come naturally. Thanks all, Adam

woops, I didn't do my math right...I guess I could only have a min gain of 1.

Thanks so much for that page of circuits, its awesome. I was wondering. After I am able to set my offset to 1 volt, if I adjust R2 and change the gain won't that change my offset as well? I want to have an output of 1-5 volts regardless of my input voltage. From what I can tell if I have a gain...

I want to know the position of moving arm. I was thinking of providing feedback of the arms position with a pot attatched to the moving section of that arm. As the pot value changed I wanted a output, proportional to the change of resistance, in terms of a current of 4-20mA. SO.. a change in...

Hello, I am trying to design a circuit which uses op-amps and resistors that would be able to make zero and span adjustments to an input signal. Can anyone here help me with the circuit design or maybe direct me to a site that has that type of info. Thanks, Adam

Thanks for getting back to me itsmoked. I was hoping that you might be able to point me in the right direction to find the actual circuit diagram using op-amps and resistors. I would rather make one than buy a pre-made controller. Thanks, Adam

Hello, I am wondering if anyone knows of a simple circuit to allow someone to adjust a zero and span output based on an input signal. Lets say for argument's sake you have a variable resistor that when it is at 100 ohms, you want 1 volt output and when the resistor is at 2500 ohms, you want 5...

Hello, I am working on a 24 VDC Burkert Solenoid Valve. When bench testing it with a regular switching 24 VDC power supply I was unable to get the solenoid to engage but when re-installing the valve into service the PLC can drive the solenoid with no problems. I am wondering why a PLC can drive...