Recent content by servo

Problem solved. After going over the entire box yet again I discovered that the wire going to the + input was loose. I tightened it down again and it works great. Thanks for your help, Jim and Carl!

The backlight is on which draws about 60mA. The converter board has the capacitors already installed and I'm using an NTE960 which is equivalent to the LM7805. This is getting frustrating.

The part number is DMS-30LCD-2-5B-C. Now, I have the converter board as mentioned above that is supplied by Murata. I have attached the 5v regulator to it as per the datasheet. Why would the voltage be at 5.5V and not at 5.0V like it should be? Also, I don't have a diagram drawn up, but it's...

It is connected to a +/- 10V control signal and I will have another set up to monitor a 2V - 12V feedback signal. Pin 10 is not connected to anything. The meter is not plugged in upside-down. I've checked and rechecked that. And, like I said, it worked for a bit until I moved the decimal...

I have a DMM that I have used all over this circuit. The box operates properly and I'm getting the proper voltage at all points. I tried a second panel meter of the same kind and the same thing happened. Also, my bad, here is the datasheet with a schematic, but it hasn't done me any good...

Hello, everyone. I am trying to add a digital voltmeter to a control box that I built. I cannot get it to respond to the inputs. It reads zero volts at all times. I have the supply regulated and isolated, so that is not the issue. I am reading the proper voltage from the test points I had...

The isolated converter works like a charm. Thanks for all the help!

I have ordered the dual converter. I hope it works this time. Don't see why it shouldn't. I'll check back in a few days to tell you how it went. Thanks for the help!

So just plugging an isolated DC/DC converter in between the control circuit and the power circuit should work? I've found one here http://www.milelectronics.com/products/series-p.htm Will this work? It meets the specs that I am looking for. +24VDC input with a +12V output and 150V isolation...

I still need to control the voltage through the whole range of +/- 10V. It controls a linear force motor through a pcb that I did not design and for which I do not have the schematics. The command signal does not actually power the motor as the control current never exceeds 5mA. When I tried...

Thank you for the responses. I am currently using multiple power supplies to generate the signals I need, including using a dual power supply/pot setup for my control signal, but I would like to be able to do all of it from just one 24V source instead of using the 3 supplies that I'm using now...

Hey, all. I've got a project that I need to do for work, but I'm not sure where to start. I need to design and build a box that will run on and put out 24 VDC, but also be able to put out +/- 10 VDC. The current does not go above 2 amps. It will also need to have test points to monitor the...

All of the relevant pins on the valve connector are as follows: Pin 1 - +24V Pin 2 - 0V Pin 3 - +24V Pin 4 - command + Pin 10 - command - The command signal needs to be +/- 10V on pins 4 and 10 for full extension, but I need to be able to adjust it through the whole spectrum, hence the...

That's the funny thing, though. If it didn't work at all it would be easier to fix, but it works properly only when the input is command + and ground is command -. With this setup it doesn't work the other way around. It's just killing me trying to figure out why works one way, but not the other.

I'm only using 1 switch. It's a standard reversal switch. The pot is a 10k .5W single turn.