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Woo-Hoo...my SmartieParts board arrived today. Thank you. It did take me a couple of hours to install the board, then open the Tx back up to connect the main back panel connector (Tx won't turn on without the connector installed
), install the er9x firmware (v397), and get the basic setups done. Of course I haven't flown it yet, but after a few minutes of playing I've been able to figure out most of the navigation. Very nice guys. Y'all with the brain to do this have done a wonderful job. My fingers are a little sore from the button pushes (my Evo uses turn knobs)...I'll live though. I look forward to putting this to use now.
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Latest blog entry: Transplanting a Spektrum Dx4E Rf Deck...
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Radian Pro
I was showing off to a bunch of cute young ladies about 40 years younger than me by doing loops and rolls. I was flying inverted on the far side of a row of trees at the park I fly at. The plane went below the trees and never came back up. I thought it might have gone down on one of the commercial buildings so I used my Radian V1 with my keychain camera to do a video recon of the rooftops but no foamie to be found.
I only hope whoever found it is enjoying it half as much as I did.....now I am into 3D foamies and another Radian Pro will have to wait. Bill
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United States, CA, Los Angeles
Joined Aug 2006
1,026 Posts
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I made time and this is what I've found out as far as listening to the PPM and measuring it with a DVM. Yes my computer speakers with a cap in series makes a super growl that changes with stick movement. This would be before any diode and right off the 9x PPM module top pin. I do have the 1K resistor/trainer mod before this point. As for using a meter. My inexpensive DVM on the 20 volt scale reads .33 volts with the PPM signal off on my 9x and 4.53DC with a PPM signal present. I got 4.44 volts with the cap in line so I assume that I'm not reading a DC voltage but an average of the pulses? I got no real reading on the AC scale FYI. I used the switch on warning feature to kill the PPM at power up and then flipped the switch to turn the PPM pulses on and have the servos move and get the 4.53DC reading. This may be enough to see whats going on. Good luck and keep posting your results. |
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Singapore, Singapore
Joined Apr 2005
148 Posts
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Not quite so simple but not quite complicated either, that point is just a trigger like someone pointed it out, you will need a simple addition of a FET to switch the power, there is some instruction for that in the manual for the TH9X firmware (not ER9X), search for it and download it and you will see, fairly simple.
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United States, CA, Los Angeles
Joined Aug 2006
1,026 Posts
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Using the Turnigy BL Kit, cut the black wire going to the BL leaving some pig tails or extend it. Connect the Black wire piece that goes to the BL to the the "D" Drain(this is the ground return from the LEDs in the BL. Connect the black wire piece that goes back to the Turnigy connector to the "S" Source(this is ground/common) Connect the "G" Gate to pin 17 of the ATM64 CPU. No resistor needed in the Gate lead due to it's high impedance, but be careful not to short out pin 17. No resistor needed in the Drain lead because the Turnigy adapter has it. Make sure to insulate your wires and I used Hot Glue to tack everything down. If using the SP board and need more BL level use the FDD pin on the SP board as it connects to pin 17. I've done this mod and it works for me. Please be careful and it should work for you. Check all wiring twice before powering on. |
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United States, CA, Los Angeles
Joined Aug 2006
1,026 Posts
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Glad to see you got your board working. Sure an easy way to go, is was for me so I bought a few more in case Steven takes a break and spends time with his new baby that may be here, or will be soon. Enjoy programming you 9x. |
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Even if the resistors are 1% (which I doubt) you would be at -12.3%/+6.8%. To put it in perspective: If your cut-off alarm would be set to 7.0V (cut-out voltage of the LM7805 is at 7V typical), the alarm would go at 7.86V or maybe at 6.55V. It is rediculous to put a low voltage warning on this kind of inaccurate readings. Calibration is definitely needed when using the bandgap reference, and even with the LM7805 used as reference it is highly recommended. Volhout |
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Any reason why you didn't put the SD card reader on the left side of the board. There enough spare room there. A small slot in the plastic housing would be the only thing to do. No cables, no extra pcb, no glue-ing.... Volhout |
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Perth, Australia
Joined Nov 2010
102 Posts
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PPM Signal - so the good news was that the ppm signal was seeming to receive about 3.3v.
The bad news is after testing a couple times, i slipped a little and the voltmete pronged shorted out the DIY kit it seems or even a little of the back board of the 9x. So i will be buying another 9X. the mode 2's are in stock again... Anyone want parts from my current TX, pm me. |
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