I have a project that involves powering a motor and a bulb.

I need to power a 110AC LED bulb, a normal lamp bulb, and a 12V motor with a 5V connection. The issue is a normal 5V phone charger works fine to power the motor. However, bringing a line from a wall outlet and then splitting it internally to the motor and bulb creates a problem. For the motor, you need to step down the voltage to 5V using something like this.

https://www.amazon.com/Hi-link-HLK-PM01-Step-Down-Household-Intelligent/dp/B01B7FNNRS/ref=sr_1_fkmr0_1?ie=UTF8&qid=1508418195&sr=8-1-fkmr0&keywords=hi+link+110ac+to+5v+dc

Its the right size. The issue here is that it has pin connections meant to be soldered to a PCB board. I am new to designing things with electrical connections and don't know of an easier way to connect to it without soldering wires directly to the pins. Which itself seems overly awkward. What other commercial items exist that may be better?

Are there other components that step down voltage like this that are easier to work with? I also could work with 9V except nothing I have seen is as small as 5V.

The other thought is somehow having a custom cord that runs separate 110AC V and 5V voltages through it. With the 110AC wires bypassing a 5V step down.

Thoughts?

10/19/2017 9:09:41 AM

so do you need 5VDC for the motor, not 12VDC?

the one you posted is only 0.6A, so if you need 5VDC and not a lot of amps it seems like almost any USB charger would work

10/19/2017 9:48:23 AM

5V is enough for its function and allows for smaller electronics. I can't use a USB charger. Because I need 110ac for the bulb and they are all wired from the same outlet. I cannot run two separate plugs.

I'm looking to step down internally.

10/19/2017 12:06:16 PM

what is this all going into? A hoffman box or panel? Do you have DIN rails?

would something like this work?
https://www.grainger.com/product/SCHNEIDER-ELECTRIC-DC-Power-Supply-36T740

or if you have DIN rails:
https://www.grainger.com/product/OMRON-DC-Power-Supply-2REK9

10/19/2017 12:52:58 PM

are you just making a rotating beacon light? because you can buy those.

10/19/2017 1:04:05 PM

I am making a thing that people would use as a light source. The motor allows things to spin for optical affects and visual decorative rotation. The amps are not necessary from a 12V source and that's why 5V works fine. Hell, I would go to 9V if something existed that made this step down small and practical.

I need to get the commercial items to be as small as possible in order to maximize the design possibilities. Also as cheap as practical.

If you look at the size of that item I linked above, that's where I need to be. I am trying to put feelers out to what things exist that do this. Maybe there just isn't other than phone chargers.

And holy crap why isnt there a Radio Shack. For the life of me I need to find an old grizzled guy that knows electronics.

[Edited on October 19, 2017 at 1:33 PM. Reason : fds]

10/19/2017 1:32:29 PM

if off the shelf power supplies made to go inside panels don't work then just mount an outlet in a hoffman box and plug in a phone charger and the light bulb

[Edited on October 19, 2017 at 1:52 PM. Reason : .]

10/19/2017 1:52:02 PM

What I could do is find a really small 'hoffman box' or something that's similar and just throw that step down module in there with some water resistant wire access holes.

I needs to be VERY small. No bigger than 1.5 inches kind of small.

This thing needs to be mounted inside a small/medium object.

10/19/2017 4:54:02 PM

Quote :

"The issue here is that it has pin connections meant to be soldered to a PCB board. I am new to designing things with electrical connections and don't know of an easier way to connect to it without soldering wires directly to the pins. Which itself seems overly awkward. What other commercial items exist that may be better? Are there other components that step down voltage like this that are easier to work with? I also could work with 9V except nothing I have seen is as small as 5V."

The pins on that particular power supply are small enough (5 mm) that soldering directly to them would probably be difficult and the completed connection wouldn't be very robust. You could potentially use a socket crimp, but I don't think it would be much better in this case.

If you were to use a PCB, the big problem is the pins seem to have a non-standard pitch: the input pins are spaced at 5 mm, output pins 15.4 mm, and the input/output pairs are 29.4 mm apart. You'd need to make your own board, which isn't hard (KiCad) or expensive (OSH Park), but it is extra work and cost.

You can search Digi-Key for board-mount power supplies with standard pitch leads that can be easily used with protoboard:

https://www.digikey.com/short/qtqv1n

(that's for 3W 12V, but you can find several 3W 5V ones too: https://www.digikey.com/short/qtq1tz)

Digi-Key also has non-board mount power supplies with similar form factors, but they have leads instead of pins:

https://www.digikey.com/short/qtq13d

[Edited on October 22, 2017 at 9:32 PM. Reason : asdfa]

10/22/2017 9:28:02 PM

https://www.digikey.com/products/en/power-supplies-external-internal-off-board/ac-dc-converters/133?FV=ii2%7C2211%2Cffe00085%2C17d4002c%2C17d4003e%2C17d8000e%2C17d80011&mnonly=0&ColumnSort=46&page=1&stock=1&pbfree=0&rohs=0&cad=0&datasheet=0&nstock=0&photo=0&nonrohs=0&newproducts=0&quantity=&ptm=0&fid=0&pageSize=50

1/5/2018 11:45:24 AM