HobbyKing E-OSD A very simple OSD (On Screen Display) for FPV users who want to see their 2 or 3 cell LiPo voltage level while flying. Very easy to install; runs in line with your battery and also your video-out wire.
Features: Voltmeter & Stopwatch Double Voltage Input Manual Calibration Programmable Display Content Supports NTSC & PAL Anti-Glare Shade Control Signal
Specifications: Weight: 3.3g Dimensions: 34 x 17 x 4mm Working Voltage: 7.2~12v
This osd will automatically set ntsc or pal. You need main battery voltage to be 2s-3s (I havent tried 2s) and second input voltage can be calibrated in setup calibration. It,s worth doing the primary calibration, I have two of these osd's and they both track voltage with reasonable accuracy only after calibration, however if one cell fails early, the group voltage being displayed, may not show an under voltage failure in the pack, as it only reads total pack voltage, not each cell.
Don't use it on 4S battery! It might fry the OSD.
It was working on 3S, and I just fried mine when connected to 4S the first time.
Get the "Super simple mini OSD" if you need to run 4S battery.
sorry I just didn't want to call you out when the product description and the product manual states 2-3s. I see a lot of people complaining about products on this site when they have clearly not set it up properly or have failed to read anything at all......
But you can't deny the fact there quite a few products on this site are mis-labeled. a good example would be the 12A ESC which are labeled 2-3S, but in fact runs on 2-4S.
I could have said nothing, but I wanted to warn anyone who is tempted to try.
As the osd draws minimal current, and you're calibrating anyway, to drop 25% voltage, series a 330 ohm and 1k, run 1k from negative, 330r to positive, sense pin to junction between the two resistors. 1/4 watt should do fine, total draw from resistors will be about 10ma.
I've added some extra pin headers to the E-OSD, there are now 6 pins on the Batt1 and Batt2 side, and 3 pins on the Video side (I'm going to the battery side "left" and the video side "right"). The spare headers are meant as passthroughs (avoid the PITA of making any kind of harness), BUT I'm not sure it will work (chime in anyone)!!! Here's how it will go. From camera: GND and V go to BATT1* VID goes to "VID-IN" (the adjacent spare header). VID-IN goes to stock VID-OUT header. V from BATT1 goes to spare header on VID-OUT side. Does anyone know if this will work?
10 points to anyone who can answer this question. 100 pts for a diagram. Equipment: 12v camera, E-OSD, 1.3 vtx, lc filter (from let's fpv), and a SHARED BATTERY. I want to minimize the wiring/clutter, and I'm using servo plugs to connect everything for now.
Lol, didn't know you could award yourself... (raised eyebrow)
Just got mine. Works fine. It is worth the price. Pretty simple to monitor FPV pack battery or motor battery (if under 3S). There are some interesting projects to do RSSI monitor (check rcgroups). You have to to make a Y connection between camera wire and tx wire to the OSD (video input) i.e camera signal and tx signal going into video input on the OSD. Gnd can come directly from pack.