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Thread: SB-28's (external power)

  1. #11
    Thank you Jeff. Fortunately I can manage with 1/128 or 1/64. Sometimes I might want flash multi mode.

  2. #12
    I used a 6V4.5A external battery to power up my Yongnuo 568 EX III flash using above technique. Flash started heating up within seconds that it nearly melted the plastic adapters. But didnt fry the flash. What could have gone wrong 20200514_153308_mfnr.jpg

  3. #13

  4. #14
    Administrator -jeff's Avatar
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    When did you notice the heating of the plastic? Was it while activating the flash? What part of the plastic was getting hot?

  5. #15
    Quote Originally Posted by -jeff View Post
    When did you notice the heating of the plastic? Was it while activating the flash? What part of the plastic was getting hot?
    It was while I was turning the flash on. Actually the flash didn't turn on.Parts along the positive terminal were heating up. Specially those connectors (1and 2 in figure) were nearly melted.red wire is the positive.20200514_213128.jpg

  6. #16
    Administrator -jeff's Avatar
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    Looks like someplace in the circuit was drawing a lot of current. Check the placement of your plastic inserts in the flash. Make sure the polarity is correct and that the inserts are in the right holes.

  7. #17
    Thanks Jeff. However yesterday I could turn on the flash for a little while with newly bought battery. Then I fully charged the battery today and tried and then this happened. How to decide whether inserts are in right holes properly? Here is a clear figure shiwing the holes.15894733099786648542138879892425.jpg

  8. #18
    Administrator -jeff's Avatar
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    Without seeing the bottom of the battery compartment it's hard to tell which slots your plastic tubes should be in.

  9. #19
    Yes I understand it. However I could determine them. Also I manged the heating issue by putting following connections. Now the problem is the flash time again. After 8 hours of charging flash battery drains in 5-6 hours . Is it the nature of Yongnuo flashes?20200517_164536_mfnr.jpg

  10. #20
    Quote Originally Posted by Kamalawarna View Post
    Thanks Jeff. However yesterday I could turn on the flash for a little while with newly bought battery. Then I fully charged the battery today and tried and then this happened. How to decide whether inserts are in right holes properly? Here is a clear figure shiwing the holes.15894733099786648542138879892425.jpg
    Hey buddy,
    Yongnuo 560 flashes you have to mount the batteries in the lower 2 terminals only so I'm pretty sure if you find the 2 correct terminals your problem will go away

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