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Simon replied to Guaifi's discussion The problem IS NOT the 3.3 regulator, it is the dataflash level shifter
"The data lines PG0, PA6, PJ2, PJ1 from the AT2560 link to the A port of the TXB0104 level converter. This is the LOW voltage side. THe output lines from this chip - the HIGH voltage side B port - go to the AT45DB161 dataflash chip which is powered…"
Mar 10, 2014
Simon commented on Jérome Mathey's blog post Front mount brushless gimbal for Discovery like frames
"@Steve - yes, in my opinion that's the wrong way to use those dampers.
As it happens I'm just mounting my design to a 450 frame. Looks good so far.

Parts 3D printed, uses RC-Timer motor for roll axis and a self-wound motor for pitch control. The…"
Feb 14, 2014
Simon replied to Jean-Philippe's discussion how do I select the optimized wire gauge to connect motors for my Octa V copter ?
"38 inches from motor to main platform - that's one big machine !
As far as your choice of wiring goes I suggest that you read through the attached file. You'll find lots of similar advice around the web - and on this forum.
With regard to the gauge…"
Jan 3, 2014
Simon replied to Randy's discussion ArduCopter-3.0.1 released!
"@ MHA
Re. TBS Discovery geometry - take a look at the Discovery manual. The angles you want (55 deg and 125 deg) are the angles between the centre line and the motor axis to CoT point.
Max Levine did an earlier post re the set-up.
Hope this helps.…"
Oct 2, 2013
Simon commented on Jani Hirvinen's blog post Adding more features to IOBoard
"LTMNO - so which one is the DHT-U display exactly ?"
Jul 28, 2013
Simon commented on Jani Hirvinen's blog post Adding more features to IOBoard
"Richard, I do like that degrees symbol used by OpenTX, very neat. However the minutes section - 97.8676 - is clearly not correctly displayed. I should have mentioned earlier that the FrSky protocol expects data in the form dddmm.mmmm. I  went a…"
Jul 28, 2013
Simon commented on Jani Hirvinen's blog post Adding more features to IOBoard
"@ LTMNO
No, of course the numbers don't 'match' - they're not in the same units are they.
Take another look at my post.
MAVLINK sends data in degrees.decimal degrees
The latest FrSky_Mavlink program will transmit the data as -…"
Jul 27, 2013
Simon commented on Jani Hirvinen's blog post Adding more features to IOBoard
"@ LTMNO
Please explain why you think that Lat/Lon are incorrect."
Jul 27, 2013
Simon replied to Christian Winkler's discussion FrSky inverted TTL APM2
"Jani - forgot to mention that I added the following variables to IO_Board.h
// new variablesstatic float      deg_dat = 0 ;static float      dec_deg = 0 ;static float      min_dat = 0 ;static float      dec_min = 0 ;static float      sec_dat = 0…"
Jul 25, 2013
Simon replied to Christian Winkler's discussion FrSky inverted TTL APM2
"Hi All,
I have my telemetry stream working correctly with APM 1 telem output to an IO_board and thence to a FrSky D8RII-Plus Rx. The connection to the Rx is simply IOBoard D5 -> D8R-II Plus Tx port; the Gnd line is already common.
My Tx uses the…"
Jul 25, 2013
Simon replied to Jon von Weymarn's discussion Telemetry to Turnigy 9X (with FrSky FLD-02 Telemetry Display Screen)
"Mike, that’s interesting – yes the FLD-02 does indeed show lat & lon exactly in the format given in the published protocol.
The MAVLink GPS message gives data in decimal degrees and I guess this is what I wanted to see on the ER9x display (and now…"
Jun 7, 2013
Simon replied to Jon von Weymarn's discussion Telemetry to Turnigy 9X (with FrSky FLD-02 Telemetry Display Screen)
"Like many of you, I've been struggling to get the GPS data displaying correctly and hoped that Mike's code would provide the answer. Not in my case it didn't, though others have reported that 'it's working well'.
The problem I found was that the…"
Jun 7, 2013
Simon commented on Jani Hirvinen's blog post jDrones News: jD-IOBoard v1.0
"@ mohd fitri - so how did you manage it ?  I have tried to rescue the 328 following the jDrones advice but no luck whatsoever.
jDrones promised to 'get back to me' last week but (guess what) I'm still waiting - no change there then. Thanks Jani."
Mar 23, 2013
Simon commented on Jani Hirvinen's blog post jDrones News: jD-IOBoard v1.0
"@ mohd fitri - I wish you luck, I , with many others, have been trying to get an answer from jDrones on this issue, for nearly 3 months in my case.
I too have tried to burn the bootloader via AVR Studio and also by following the offered tips re…"
Mar 19, 2013
Simon replied to Alexander Casassovici's discussion Stylish quadcopter frame design
"@ Jim Powell – what does your printed part weigh ? Assuming that it has quite a thin section,  I’d be interested to hear whether you think that it is going to have sufficient strength to be really useful .  The Dimension 1200es 3D printer I have…"
Mar 3, 2013
Simon commented on LTMNO's blog post 6 Position Mode Selection for APM with LED Feedback
"@LTMNO – this could be a long post !
Yes, the Tx is MODE 2. Because of that I wanted the mode switch to be RH accessible. I prefer to keep the throttle under control at all times.
No, it’s not the standard P2 POT, it is a 6-position switch with a…"
Feb 25, 2013
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