Yongnuo Transmitter With Pc Cable Triggers Flashes Over and Over Again
Modding Yongnuo RF-603 II to trigger via PC-sync
Modding Yongnuo RF-603 II to trigger via PC-sync
I recently purchased three RF-603 II flash triggers and was thinking to mod them to support triggering via PC-sync port. Has anyone done it before? Any help appreciated!
Sure it is possible to connect pc-sync hot shoe adapter but I would like to keep setup simple without any extra parts.
If no one has done it then I was thinking to post here my findings and hopefully fully working solution.
kli • Veteran Member • Posts: 4,216
Re: Modding Yongnuo RF-603 II to trigger via PC-sync
marzolio wrote:
I recently purchased three RF-603 II flash triggers and was thinking to mod them to support triggering via PC-sync port. Has anyone done it before? Any help appreciated!
Sure it is possible to connect pc-sync hot shoe adapter but I would like to keep setup simple without any extra parts.
If no one has done it then I was thinking to post here my findings and hopefully fully working solution.
Good luck.
Given that the existing PC port is input-only, this should be interesting if you do manage to find away to make it an output or to switch between input-output. You might have to force one unit to be a dedicated transmitter, and then dig out the sync connections to wire to the port. IIRC, the outside ring is ground, the inner pin is sync. But I could be wrong on that.
The old RF-602s (not the current versions) actually used to have a PC output on the transmitter unit, but Yongnuo then removed it, and has never put one on any of their later triggers. I once tried adding a PC sync output into one of the RF-600TX units (they'd just removed the port, the contacts were still on the board and just needed to be soldered to) but completely screwed it up and nothing worked.
Personally, I'd probably just switch to triggers that offer PC input/output, like, say, the Godox X1. That'd cost me less than the RF-603II units I'd undoubtedly be trashing with my lack of good soldering skillz.
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OP marzolio • New Member • Posts: 4
Re: Modding Yongnuo RF-603 II to trigger via PC-sync
fotowbert • Veteran Member • Posts: 3,293
Link is for original YN RF-603 trigger
marzolio wrote:
Actually someone pointed out this link for me https://nikonrumors.com/2012/06/02/diy-modifying-the-yongnuo-rf603n-wireless-remote-flash-trigger.aspx/
Let's see when I get the units.
Your link is for the original version of the YN RF-603 Nikon RF trigger. You will not need the 33K ohm resistor portion of this mod because the Mark II version of the triggers fixed that issue. My RF-603II for Nikon don't have to be in a Nikon hot-shoe to transmit the fire flash signal. Since there are some defective RF-603II in the supply chain you should confirm they work correctly before doing a mod on one.
Since the resistor isn't needed a SPDT (Single Pole Double Throw) switch is all you need to switch the PC port between input and output. The Mark II version added a side mounted switch so adding a 2nd one may be more difficult. If you don't intend to ever use the PC port as an output I suggest just rerouting the center wire of the PC port to the center contact in the hot-foot.
- John
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"[If you don't sweat the details] the magic doesn't work." Brooks, F. P., The Mythical Man-Month, Addison-Wesley, 1975, page 8.
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kli • Veteran Member • Posts: 4,216
Re: Modding Yongnuo RF-603 II to trigger via PC-sync
marzolio wrote:
Actually someone pointed out this link for me https://nikonrumors.com/2012/06/02/diy-modifying-the-yongnuo-rf603n-wireless-remote-flash-trigger.aspx/
That mod has nothing to do with switching the PC sync port to input/output, though. It's basically just to switch an original Mk I RF-602 to be in transmit mode, since those signals only worked on Nikon/Canon hotshoes with the right signal coming in on the right TTL pin/contact and a lot of folks wanted to use them on other systems (e.g., mirrorless). You're basically just shorting the TTL signal Yongnuo used to trigger the switch to transmit.
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fotowbert • Veteran Member • Posts: 3,293
Look again kli
kli wrote:
marzolio wrote:
Actually someone pointed out this link for me https://nikonrumors.com/2012/06/02/diy-modifying-the-yongnuo-rf603n-wireless-remote-flash-trigger.aspx/
That mod has nothing to do with switching the PC sync port to input/output, though.
Look again kli. You missed that part of the mod. Here is the schematic from the link. Note the right hand side where the PC port center contact is switched between the hot-foot (input) and the hot-shoe (output). The text describes this also.
- John
-- hide signature --
"[If you don't sweat the details] the magic doesn't work." Brooks, F. P., The Mythical Man-Month, Addison-Wesley, 1975, page 8.
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kli • Veteran Member • Posts: 4,216
Re: Look again kli
fotowbert wrote:
kli wrote:
marzolio wrote:
Actually someone pointed out this link for me https://nikonrumors.com/2012/06/02/diy-modifying-the-yongnuo-rf603n-wireless-remote-flash-trigger.aspx/
That mod has nothing to do with switching the PC sync port to input/output, though.
Look again kli. You missed that part of the mod. Here is the schematic from the link. Note the right hand side where the PC port center contact is switched between the hot-foot (input) and the hot-shoe (output). The text describes this also.
Yup. You're right. I was getting it confused with the other mods where they just short the TTL connection and make a permanent transmitter.
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OP marzolio • New Member • Posts: 4
Re: Modding Yongnuo RF-603 II to trigger via PC-sync
Just finished modding the second RF603II. I did'nt end up using switch since I need these to work with flash light meter and with my old cameras which only have PC-sync.
Without switch mod is really straight forward and easy.
- Desolder PC-sync port's red wire (+) from board
- Cut middle wire (S) from hot shoe and connect both ends to red wire from PC-sync port
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