Dual Generator
Posted February 28, 2009
By admin
Dual Generator
Can You recommend a great power supply for lab experiments (possibly AC and DC)?
I am looking for some suggestions on a really good experimental power supply I can buy for some simple benchtop experiments. Can someone recommend a good one or a good supplier?
I went to a surplus store, and they had a brand new single for $200 with 5A/ 0-30V DC with meters...The guy said AC ones are hard to get.
I wasn't that impressed.
I wonder if they sell ones that can do 0-120v DC and AC (adjustable frequency, etc)? Dual? In sort of the same price range.
Or would I have to build circuits do to this? Maybe I need a signal generator instead?
It seems strange they wouldn't have a good one like this on the market for a reasonable price, that can do a lot of stuff.
I got a great digital multimeter for example for 80 bucks that can do just about anything.
I have an EE degree, but haven't touched the stuff in 15 years. (done only software stuff). I would like to try some very simple experiments and play with diodes, coils, and transistors
Thanks for any pointers!
Usually, you won't find both AC and DC output in one power supply. Most benchtop supplies are DC output. You usually have choices in the number of output voltages, the output current of each, and some other features which usually aren't that important (programmability). I personally own an Agilent E3630 supply which offers three output voltages (each is DC) and is fairly low noise in its output (good for analog circuits). We have some similar supplies on our benches at work from a different manufacturer, but these triple output supplies normally cost around $400 on up.
I attached a website link below for a company I have used to buy test equipement including power supplies.
If you need an AC supply at 60 Hz (assume you are in US), then you can find a variable transformer, also known as a Variac, and use it to step up or down the line voltage. These work at other frequencies too (50 Hz). Variac is trademarked, but is often used as a shorter name for variable transformers. Cost of one of these is on par with the cost of a good DC bench supply. Be careful on the wiring if you choose to do this!!
Hope this helps...
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