5V boost converter smoked on first use
grumpazoid last edited by
I have purchased some of the recommended 5V boost boards at https://www.ebay.com/itm/DC-DC-Boost-Converter-Module-Step-Up-Module-1-5V-to-5V-500mA-for-phone-MP4-MP3/381185956688.
As soon as I have applied approx 4VDC at the input (no load) the board my PSU has hit the current limit. No wanting to give up so easily I then tried an 18650, which produces some nice smoke.
faulty board or operator error?
@grumpazoid I'd say operator error if you connected the power supply incorrectly, faulty board if you connected the power supply correctly
It's difficult to say with so little information.
Do you have a picture of the board?
How did you wire things up exactly? Are you sure you didn't reverse polarity? Perhaps you're sot supposed to run these without a load?
I was wondering about the no load.
I've just carried our some further investigation . It looks like C3 that is connected between ground and 5V O/P has been shorted out with solder. I guess this would exceed the 500mA specified ;).
bjacobse last edited by
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bjacobse last edited by bjacobse
This seems that E50D might be same as CE8301, but somehow they use a smaller cap, maybe to save money, try to replace C3 with a 100uf 16V electrolyte capacitor
@bjacobse Thanks. In the end i removed the solder that was shorting out the capacitor and it now outputs 5V. Not sure how safe it is after the overheat
As an experiment I cut the track to take the LED out the circuit. This reduced the current from 2mA down to a few uA.