Is this thing a sh*t bay charger

[evilkitty]

This a 5V 1A power supply i am using to run a raspberry pi zero (my thermostat), i am gonna guess and say i am using around 300ma
(Pi zero v1 headless, upto one 5v relay, upto one bright led, usb wifi)

I noted this on the caps
*width x height

• 400v 4.7uf 10x13
• 400v 4.7uf 8x12
• 50v 4.7uf 11.5x12
• 10v 680uf 8x12
• 10v 220uf 6x11

the caps appear to have a brand name and actual part numbers

1. is this thing a POS?
2. it has a hideous blue led (took this opportunity to hide it inside the brick)
3. it has a very audible coil wine

Sorry for camera blur

[stj]

Re: Is this thing a sh*t bay charger

it looks good to me.

[budm]

Re: Is this thing a sh*t bay charger

Perform the safety test just to see what you get.
BTW, it may be OK for now but may be not in the future.
Any labeling on the case?

[redwire]

Re: Is this thing a sh*t bay charger

It's not total crap but I don't see an opto-coupler for voltage feedback and only one mains rectifier diode (1/2 wave) with 4.7uF cap, so I would say it's not a great design.
It would have mush voltage regulation on the 5V and the slightest hiccup on mains would reboot your RPi, this PSU has no "hold time".

[evilkitty]

Re: Is this thing a sh*t bay charger

it has ran for probably 3 years
i have checked the system uptime and saw over 300 days worth, so either it has some hold up time or my mains is awesome
It was supposed to be the unit adafruit was selling to run raspberry pis
i looked up the ebay listing from my purchase history
https://www.ebay.com/itm/181303169162 2015/06/15
*adafruit only offers UPS shipping and i was not paying that kind of shipping

[sam_sam_sam]

Re: Is this thing a sh*t bay charger

it has ran for probably 3 years
i have checked the system uptime and saw over 300 days worth, so either it has some hold up time or my mains is awesome
It was supposed to be the unit adafruit was selling to run raspberry pis
i looked up the ebay listing from my purchase history
https://www.ebay.com/itm/181303169162 2015/06/15
*adafruit only offers UPS shipping and i was not paying that kind of shipping

I personally do not like compact power supply like that
Most of the time I over size my power supply for what I going to use it for

When ever I get a switching power supply
(1) I always open them up and recap if it does not have name brand caps
Most of the time before I put power to it and most of time I buy more than one of them

(2) I always look at the solder joints to see if I need to redo anything

(3) I always check the output voltage on them to see if it put out what the tag says it should

(4) If the power supply is more than one amp I will do a load test to see if can put out the amps it says it should

(5) I keep that load on it 15 to 30 minuets to how warm the power supply gets

(6) I have not started doing this one yet I am going to check the metal housing on usb charges to ground for how much voltage leakage there is

This is my two cents worth about buying switching power supply

[redwire]

Re: Is this thing a sh*t bay charger

+1 and I also do a IPA clean of the PC board for flux and slag