BetaFPV VR04 Hercules diversity
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Analog vrx module bay for VR04. At the moment fits TBS Fusion with cooling fan
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I was not sure by this mod. Goggles are build to perform as they are - affordable, so this all can be quate a stretch. It gets hot just by existing with dvr on rec and battery draining faster than i expected with little to none indication of voltage, and without vtx signal screen setting in uncontrolable. By this mod you lose control on goggles - so use vrx modules with screen and joystick to tone in freq and band.
As mutch I like it or not. It's here. This thing is easier said than done. Realy it helps when you know what are you looking at.
I dont have means to test fit other vrx like speedybee or rapidfire so feel free to coment in fix or remix.
Parts i use:
3d printed module bay
4 screws DIN 912 M3x8
TBS fusion module
252510 5V fan (bambu lab hotend fan)
few wires, capacitor 10V 100uf, 9 pin socked header 2,54mm pitch - all not critical just what i got on table laying around
double sided tape (thicker variant 1mm or so)
Steps that took me to do it:
Step desolder VRX
Step solder wires
Step assamble it back
How it went:
It took a lot of flux and heat. Hot air station is necessity in this case to non destructively done it.
3 wires: 5V, GND, Video -> minimal setup
when internal vrx is missing and RSSI pin floats, goggles are displayng bad vrx signal in osd. That pin have to be powered by range from 0,7V to 2,2 V. Simple voltage divider from 5V would do the job. I did not done it, don't be like me.
Pass wires out:
goggles are 1/2 way ready at this point
Module bay:
Legs and body screw together tightly, Fan press fits on mine so i don't care that mutch of screws for it. Capacitor 25V 100uF just to be sure that fan don't introduce eletrical noise to vrx.
On goggles it holds by 3M tape.
After that it just have worked.
As for internal battery, i would be rather safe than sorry and power it by external power source. That new VRX can draw triple of power than stock vrx.
Allways reference datasheets of components you came by pinouts, voltage ranges can be different at any time and place on world due to IC shortages as RTC6715 and other situations, thats why I am not pin to pin specific.
I wish you luck, skill and fun.