JWY P/N JY07W0200-35
Vin 100-130 VAC 50-60Hz
In:0 15A Max
Vout: 25-35VDC
lout : 200ma AC (???)
Max Pout 7W
I have a project that works fine using an 18VDC computer supply (for amp) and two separate 5VDC wall-warts to power the rest of the circuit and the Nano. I'd like to eliminate those . . .
Could I conceivably use this driver as a power source?
I've been to this post and seems like I would be okay, just trying to confirm before I burn the house down.
My thought is with it already converted to DC, I could use typical voltage regulators to step down the 25-35VDC to 18V and two 5VDC sources. (as shown here)
I would fuse the 120VAC in and mount the voltage regulators on heat sinks.
Unrelated: I don't understand the 200ma AC value printed on the case, I know what milliamps are and AC, just not getting what it means by lout.
It doesn't say that ! It says 200mA Continuous Current. The 15A MAX is just that, a pulse requiring 15 Amps. No time given, so you can draw that until the heat shuts the supply down.
Does this sound like a safe approach with voltage regulators? I haven't opened one yet, they are glued shut and I may leave it that way after doing some breadboard tests.
Remember it is a constant current device, NOT a constant voltage device, The voltage will be adjusted to maintain a current of up to 200mA. With no data sheet for the device, there is no way to anticipate it's actions.
In theory, it should be ok. Even though the voltage of the supply may vary, your regulators will keep your 18V and 5V stable. However, it is only going to produce 200mA of current, which doesn't seem like enough to do much. For reference, an Arduino Nano can consume up to 200mA by itself.
What are the current requirements of the other things you want to drive with this? Does everything put together equal more than 200mA? If so, you will want to find something with a larger current output.
Again though, in general, your idea of starting with a higher voltage and using regulators to step it down in okay. It's wasteful and creates a lot of heat, but it works.
That was my largest concern, that it outputs enough current. I'm going through re-learning the maths on calculating current today. I'm going to add up the max current draws of the devices, that should give me the potential max draw, correct?
Currently it works great with the wall warts rated 0.5 amps each, and the 18VDC amp at 3.5 amps, both of which which are a lot more than this one outputs. I just don't know if I actually need that much.
The Nano is just used over the digital ports for signals, and 3 analog ports for pots to input to the code. The rest of it is a DfPlayer, 3 LED's, and relays with protection circuits - all X 3.
Likely not enough power.
Yes, thank you, it's all helpful since I've barely a clue what I'm doing.
Why not just use the 18V power supply that you already have, but add an additional 5V regulator to power the 5V stuff? You might just be able to split the 18V output wire so that it powers your DfPlayer and also feeds the 5V regulator. You just have to make sure that your regulator can handle such a large input.
Here's an example 5V regulator on digikey that should work. It can handle up to 25V input and can produce up to 1A output, which should be more than enough. Be sure to use a heatsink and the input and output capacitors with the regulator though!
Thanks, I did think of this (surprisingly enough lol.) The 18V is a computer power source and it's huge in comparison to the overall project. I have everything enclosed into an 8 x 8 x 12 Goodwill Phillips subwoofer box and don't want to stuff this big 6 x 2 x 1 1/2 box into the mix. I may have to go that route though.
I have some regulators on hand, at least two of them output 5v @ 1A.
The Nano and all connected devices - DfPlayer, LED's, and relays - draws at the max .15 on the meter, .08 average (80ma - 150ma, correct?) So for the 5V circuit it should be fine, I'd like it twice as much but it would work.
The 18v circuit is another matter. It's a 200 watt subwoofer board driving a 4 ohm 200 watt Pyle PLG 54 and the current is reading as high as .80, 800ma, so I'm going to need at least a 1.5, I'm thinking 2 or 3 amp source. It makes a really big boom.
Thanks for everyone's help and guidance on this leg of my journey, I haven't decide whether to hack into the 18v as @chromorphous suggested or to grow my own. Still haven't burned the house down LOL
