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Ah okay. I just want to measure one voltage more on the E-OSD and will power it by an external 5V voltage regulator which is directly connected to the FPV-Lipo.
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Thread OP
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I de-soldered the 2-pin Video/GND header and replaced it with a 3-pin header where the third pin was straight instead of right-angles. Then I soldered a tiny wire from the third pin to the +5 programming header (which is very close). This really suits me as I have a 5v (fatshark) camera connected to a fatshark vtx which supplies 5v. These are connected together using a regular 3-wire servo cable (vid/+5/gnd, I dont use audio). I simply put a y-lead into this cable and connected it to my new 3-pin connector on the E_OSD and I get video/gnd and +5v all in one! I have a second cable which connects to my GPS. I dont currently use any of the batt connectors. My only onboard battery is a 4S, not sure if I can monitor that or not, does anyone know if the voltage-divider can monitor 4S ok? Dave PS. I can post pics of this mod if you are interested. |
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i would plug into the first 3 cells.
does anyone have a picture of the dimming resistor? i cant find it! |
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Thread OP
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Now on you board look for a resistor with 121 (120 ohm) on it (there is only one). That's the dimming resistor irl! On the g-osd it's the one closest to the programing port. On the e-osd it's close to the programming port. |
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Thank you very much, I see it now.
I get "pencil mod" from computer hardware. Back in the day we would pencil resistors to raise the voltage for core and memory(allows higher overclock). Same thing should work here http://www.techpowerup.com/articles/...voltmods/101/2 I've penciled the resistor from 120-121 ohms to 114 ohms. Will test and post results. |
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Last edited by chatch15117; Nov 08, 2011 at 06:56 PM.
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101 ohms
I will probably make it 90 ohms (if I can put that much graphite on there lol) to make the text extra readable. Edit: it leveled off at like 99 ohms. |
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Last edited by chatch15117; Nov 08, 2011 at 07:34 PM.
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http://www.youtube.com/watch?v=lsLHJZvnfrw
2nd flight(not recorded due to low laptop battery) results: Stats are a little wacky. I don't think I went 255kph or NEARLY that high. LOS is correct though. I went to 750m today. Next time there is no wind I will try 1km+ |
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Last edited by chatch15117; Nov 09, 2011 at 08:31 PM.
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so it appears the original G-OSD with GPS etc... for less than $40 doesn't exist anymore... Given funds i am kinda stuck getting the E-OSD.
What exactly can the CL-OSD software do for me in the case that i only have 1 or 2 E-OSDs and not a full featured OSD like G-OSD? Can i add GPS to the E-OSD and be able to display that info? Or... is the processor in the E-OSD limited in capability/functionality? |
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same processor. you need to get a gps. I tried and failed. You can have my GPS chip if you live in the US
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G-OSD/E-OSD with AHI
Hi. I just want to show you guys my results. I changed CL-OSD to use it with an E-OSD unit to show an artifical horizon indicator. Therefor I desoldered the 5k1 resistor of the voltage divider of the main battery, which powers the unit. I am still able to power the E-OSD with my FPV Lipo (11.1V) but I cannot measure that value anymore. Thats not a problem because I read that value with my G-OSD. I tried to read the values out of the MMA7361 (accelerometer) which worked, kinda. But it gave me too low voltages on the OSD. So I built a voltage follower and just put it between the E-OSD and the accelerometer and then I got the right voltages. Now I was able to measure small voltages directly so I soldered the x-axis-output of the accelerometer (via voltage follower) to the input of the E-OSD and soldered the y-axis behind the 5k1 resistor so i skipped that voltage divider as well. Then I changed the CL-OSD firmware which took a little while and now I have got a nice little AHI for 20$. Here are some pictures...
Here's the unit which can be powered directly with 8-14 Volts and outputs only the AHI. That is my whole FPV setup consisting of a 900mAh FPV-Lipo, a transmitter, a camera, one G-OSD, one E-OSD (both flashed with my own versions of CL-OSD), the receiver with selfmade RSSI output (including voltage follower). In this picture the GPS is missing. Thats the result with both, E-OSD and G-OSD, working. |
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Maybe this will do |
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guys .. this is pretty amazing !
is there somewhere along this very-long-thread a complete walk through ? it is very difficult to follow all the tech data .. i have one of those https://www.hobbyking.com/hobbyking/s...dProduct=19369 and one of those https://www.hobbyking.com/hobbyking/s...ing_E_OSD.html are they any good for this project ? thank you ! |
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