5v power supply?

[ljoe1969]

would someone recommend a 5v power supply other than a pc power supply?

i would like to have something smaller.

[NeoMoses]

how much current are you looking for? If it's less than 1 amp, look at cell phone charges, printer power supplies, etc... Also, go check out Radio Shack. They have all kinds of power supplies.

Finally, you could build one yourself, but I doubt if you'd save much room over a PC power supply.

[abasir]

Just bear in mind that some of the above supplies MAY NOT be regulated and may fry your ICs. If you don't mind soldering, you could solder a simple voltage regulator (like the 3-pin LM7805) and a capacitor to get 'clean' 5V. If low current, whole thing can be about 2" cube , the transformer is the biggest part

[ljoe1969]

i just got an email from jeff at xylotex. he said a dc power adapter like the universal dc adapters sold at walmart would work only it has to be no more than 5.5v. he said any adapter rated at 5v 100ma would work.

the universal adapters sold at walmart are switchable between 3v, 4.5v, 6v, etc. they dont have one that is 5v.

does any one know where i can get one?

[Chagrin]

A google search for "wall transformer" should turn up a supplier. If you're stuck, I see that alltronics.com sells 1A 5V regulated for $7.95.

[abasir]

My mobile phone is Sony Ericsson T610. The charger is _regulated_ 5V. May be you could find 3rd party (cheap ) replacement charger at phone shop?

BTW, most ICs are rated 5V +- 10% thus _regulated_ 4.5V would work as well. Non-regulated 4.5V typically gives 6-7V output.

Sample regulated 5V from jameco.com
http://www.jameco.com/cgi-bin/ncomme...s=503;528;779;

[ger21]

Why not just buy the one that Jeff sells?

Gerry

[ljoe1969]

jeff doesn't have any more to sell.

[ngr1]

Hello, will 4.8VDC/50ma be enough power?

Thanks

Norman

[ljoe1969]

how can i tell if it the wall transformer is regulated or not?

[abasir]

Norman,
Based on Jeff's feedback - you need 100ma. 4.8V is okay. You could use two units in parallel

ljoe,
It should be written on the transformer (most switchable ones are not). Otherwise you need a multimeter (voltmeter actually). Set it to DC to check whether DC voltage is correct (about 5V). Then set it to AC. You should see small number in the _mV_ range (normally less than 50mV but the smaller the better).

Hope that help