Pay attention to wire the positive power wire on the 3V3 and not the 5V pin on the ST-Link dongle, it's the bigger chance to damage something. There you can find the wiring diagram that i've personally tested and, as soon as i get other receivers, i'll test the mod and i'll update the tutorial. I put "zoomed" wiring diagram in this page (scroll down, it's not english but you only need to look at the images at the end). In the image you can see what i did on my IA6B receiver. The pads aren't huge, but at least they are reasonably spaced, it's not an hard soldering task. I don't really support this trick because the chances to short circuit and burn something are way more than the chances to damage the PCB by soldering. Some people just kept the wire in place by hand. I've used the wires that came along the ST-Link, cutting and soldering them in the right place. Now, depending on the receiver, you need to find its four connection pads and connect them to the right pins on the ST-Link. The first step is to remove the receiver's case, if any, and expose it's PCB.
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