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Posted by seurat | Nov 05, 2014 @ 01:01 AM | 2,144 Views
I have used the arduino high speed capture method laid out by Michael Dreher ( and adapted his source code to the arduino micro for analysis of the PPM signal coming from the DSC port on the Hisky H-4Q transmitter. The clock tick is 62.5 ns. This allows measurement of pulses from 3 us to 65.5 ms.
Attached is a preliminary evaluation of the captured data as a time diagram.
The H-4Q produces a positive PPM signal containing 8 channels per frame. Only the first 5 channels are usable: aileron, elevation, throttle, yaw and the DR switch.
Approximate values for max. and min. are based on the output of the DR-SW channel and are measured from rising edge to rising edge: min. = 1 ms. / max. = 2 ms. / sync = 4.5 ms.
The next step will be to write an arduino sketch to decode this PPM signal and produce a USB HID to interface with HELI-X.
Posted by seurat | Nov 03, 2014 @ 08:45 AM | 2,136 Views
This is going to be fun!
I received an IR controlled 3 channel toy heli for my birthday from my oldest son.
Since it turned out to be so much fun I decided to go for something better.
I purchased a bundled HFP100 V2 from TMART with a H-4Q transmitter.
Wow, this little heli works just like the real ones expect for the missing main rotor pitch which is fixed. It weighs just under 50gr. so crashed won't wreck much havoc in my living room.
After some 5 tries I have managed to hover tail-in and land once the battery gets weak.
I bought a 350mA/h LiPo nad tried to wire it in. While doing so I managed to reverse polarity and fried the receiver
Purchased a replacement receiver from Banggood. Took 20 day to arrive.
The heli flew some 5 time with the new receiver and then the elevation channel quit working. The receiver has a damaged elevation channel This sucks.
I decided to order a new HFP100 V2 and use the old one as spares lot.
So what's next? I have decided to buy myself a Walkera V120D02S bundled with a DEVO 10 transmitter for Christmas
I'm waiting for both now.
In the process of waiting I decided to purchase a PPM2USB adapter from Conrad Electronics to see if I could get the H-4Q transmitter to work with HELI-X.
No luck here . It seems every transmitter manufacturer has a different idea on how to code the PPM signal.
I've bought an Arduino Micro and will analyze the signal coming out the H-4Q trainer port.
The analysis of the PPM signal coming from the...Continue Reading