DC Power Supply

[lerameur]

hello,

I am looking to buy a DC Power Supply. I am not sure of getting a
digital or analog display. And also one output or two output.
Is there a specific use for one of the above or is it simply a decision
of personnel taste..

I am mostly doing home projects, I dont think need to go more then
30-40 v.

thanks

Ken

 

[John Popelish]

hello,

I am looking to buy a DC Power Supply. I am not sure of getting a
digital or analog display. And also one output or two output.
Is there a specific use for one of the above or is it simply a decision
of personnel taste..

I am mostly doing home projects, I dont think need to go more then
30-40 v.

I prefer analog meters. Not so precise, but instant visual
feedback. I use a digital meter at the circuit under test
if I need a very precise setting.

I also like supplies with both voltage and current settings,
so I can limit short circuit current to just a bit more than
the circuit requires. The main advantage to a dual supply
is that you can turn the pair on and off approximately
simultaneously.

 

[lerameur]

I prefer analog meters. Not so precise, but instant visual
feedback. I use a digital meter at the circuit under test
if I need a very precise setting.

I also like supplies with both voltage and current settings,
so I can limit short circuit current to just a bit more than
the circuit requires. The main advantage to a dual supply
is that you can turn the pair on and off approximately
simultaneously.

I am not sure, but I think a dual supply is when you can supply two
circuit with different power. Is this something that is used commonly
in normal operation ? I mean I am going to be facing this situation
often ?

ken

 

[Stanislaw Flatto]

hello,

I am looking to buy a DC Power Supply. I am not sure of getting a
digital or analog display.

Analog, its readout is instantly noticed by human eye, no reading required.
If, repeat if, for some strange reason you want to use your power source
as voltage reference use your working AVO-meter to adjust it to any value.

And also one output or two output.

2 floating supplies can be combined in series to add their voltages or
in parallel to increase current. When playing with different cirquits
you never _know_ what comes in.

Is there a specific use for one of the above or is it simply a decision
of personnel taste..

Taste? How does it taste to go crazy because you cannot activate a
simple cirquit.
It is called "experience".

I am mostly doing home projects, I dont think need to go more then
30-40 v.

Right! One old-timer called 741 is a good teacher!

thanks

Ken

Have fun

Stanislaw

 

[John Popelish]

I am not sure, but I think a dual supply is when you can supply two
circuit with different power. Is this something that is used commonly
in normal operation ? I mean I am going to be facing this situation
often ?

Most dual supplies consist of a positive and a negative
output that share a common ground. This is very convenient
for either opamp type dual supply systems, or to use in
series as a higher voltage single output. But it limits the
flexibility to use the two isolated from each other. For
isolated situations, I usually use two single supplies.

By the way, old HP supplies had the best quality meters:
http://cgi.ebay.com/HP-Agilent-Dual-DC-Power-Supply-6228B-SN-2833A-04941_W0QQitemZ120053397112
but you have to switch between voltage or current
measurements. For simultaneous metering, old Lambda
supplies are nice:
http://cgi.ebay.com/LAMBDA-LPD-421A-FM-DC-DUAL-REGULATED-POWER-SUPPLY_W0QQitemZ250049886690