The JHEMCU GHF420AIO is an All In One (AIO) board that combines a F405 flight controller with a 20A BLHeli_S ESC that is specced to handle 2-6s. A board like this will allow you to greatly simplify and lighten builds with less space required and this is exactly what I have done to improve my 3 inch Flex RC komori.
JHEMCU is not a catchy brand name but they did do themselves proud by releasing the first AIO board with 25.5mm mount (whoop boards) that were truly reliable, namely the GHF411AIO and GHF405AIO which were successfully used to power quads up to 5 inch. They've built on this success by making and releasing more products, including the GHF420AIO as I'm reviewing here. 20mm mount boards have had little attention since the rise and rise of the whoop board but they are still highly relevant in 3 and 4 inch quads where it is still the most common mounting pattern. It's not the first time there has been an AIO 20mm board - The original HGLRC Zeus was released 2 years ago but this was plagued with faults, and was expensive meaning even a single burnt ESC (which was common on these) meant you $60 spend was down the drain. Well the good news is with JHEMCU here the cost is down to $35 before discounts applied and quality is well up.
Since half of the planet is currently having weather that is forcing people indoors at the moment (not me haha!) I've reviewed some All In One (AIO) camera and VTX combos. Traditionally these have been used on tiny whoop style indoor brushed quads and smaller micro brushless quads although more and more brushless quads are using slightly heavier micro CCDs as standard.
Weight is still very much the name of the game in brushed quads as you'll struggle to get a 4:1 power to weight ratio even on the larger 8520-based brushed micros. This means CMOS-based AIO cameras are still the norm because they are so light. In this round up I've gone for some of the lightest cameras I can find and best of all, 2 include video in / video out so that no tricky wiring hacks are needed to run betaflight OSD.
Note: This is clearly not an exhaustive test, I happened to have a number of AIO camera at the same time I ordered for various micros so had a chance to compare. I though the improvements over the Eachine TX01 were impressive so thought it would be work sharing.
Clearly discussion on image quality is missing here - I found the 4 CMOS AIO camera above very similar and wouldn't be able to tell apart in a blind test. The only AIO I've picked up which is clearly inferior is the VM2751 standard on the leader which is not included in this shootout. I thought this camera/vtx was the weak point of the Leader 120 quadcopter.
For a micro brushed quad without an OSD I'd recommend the LST S2. For goodness sakes it is only $9!!! Further to that it is light, easy to change channel / band / video format and small.
For a micro brushed quad with OSD or if you are after every milligram of weight savings, get the CM275T. It is CRAZY light at 3.2g and has a very convinient video/in out so that you don't need to mod your cam just to enjoy betaflight OSD - assuming your FC supports it. I know it's at odds with what I said about brushless and ccd cameras but this will be going on my Eyas X2 rebuild going for the lightest 2" possible - targetng 35g with props. Here is my original X2 eyas build on rotorbuilds if your curious.
For a brushless quad 2s and up just get the micro swift or equivalent and the TX200 VTX. The video quality is just so superior in all but the best lighting conditions. VTX can be a little tricky with band / channel display but transmission quality is excellent and you have the ability to bump the transmission power up to 200mW.
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