Thanks for your repply.
You say to run simple 2 wires for 5V and ground to the pot, and 1 shielded wire for the low voltage return?
Something like this
Frequently a potentiometer is front panel mounted, far away from PCB. If this pot is used as a potential divider to form a voltage reference (let say 5V input from motherboard and milivolts range output back to motherboard ), the wiring problem becomes important. So what is the ideal wiring...
Thanks for your answer, Kain.
You are wright. Those PSU have a optional earth ground. On the front panel have 4 connectors for two positive PSU and one separate connector for earth ground. You can conect it in series and you have a double voltage PSU or a floating ground positive/negative...
I have a stupid question.
90% of profesional lab power supply is dual (floating). What is that?
Is like two 1,5V batteries? If I want, can I conect it in series and make a 3V supply or positive/negative supply +1,5V/-1,5V whith a virtual gound.
Supose I have 2 independent supply like "0-30 Vdc...
This is easy. The transformer have 2 separate windings for 29V (is a 2x29V). So I can make 2 taps in windings and conect them in paralel. But I can't do this for primary. In my knowlege there is some losses in core, too.
I dont know.
Maybe I need some kind of experimental consumer, something...
Thank's for your answer.
You say:
"So just remove turns until the loaded voltage is correct."
There is the problem. It's verry simple to remove turns, check whith multimeter and have desired NO LOAD voltage. But can I calculate the NO LOAD voltage for a given FULL LOAD voltage. I need 24VAC at...
I have a big transformer: 170VA, 120V/240V primary and 2x29V secondary. This is all ratting information that I have.
I need a 24V (at full load - 48W) secondary and is possible to remove some windings for this. My problem: I don't know the transformer regulation, so I don't know what is the no...
Thank you guys for your answers. From youre debate I understand some important things.
1. A DC power supply is fine for this job. This is verry good because I can use my 12VAC transformer whith a voltage regulator and a NPN current booster. If i use a ajustable voltage regulator, the problem of...
Thank you guys for your answers. From youre debate I understand some important things.
1. A DC power supply is fine for this job. This is verry good because I can use my 12VAC transformer whith a voltage regulator and a NPN current booster. If i use a ajustable voltage regulator, the problem of...
All dimmer is designed to use on main power {eg 220VAC} and is imposible to control a 24VAC load. I found on net manny DC dimmers for low power but no for AC. I need a schematic for a simple 24VAC dimmer. I mention that i intend to use this for a 24VAC 48W 2Aheater element.
Please help.