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After two years of fluent operation, solar heater temperature sensor failed. I bypassed it with water proof DS18B20 sensor:
Also I checked for water level sensor corrosion. So far no significant damage done. Should be fine for couple more years.
ScienceProg replied to the topic winarm.scienceprog.com is goingto me merged with scienceprog.com in the forum Re: winarm.scienceprog.com is goingto me merged with scienceprog.com 1 year, 4 months ago
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Since motherboard is a multilayer PCB it can be tricky to heat the solder and remove caps. I just used 100W soldering iron which did the trick. Luckily there were no SMT parts near so no damage were made.
Updated info on following blog post:
Questions are welcome!
Started to collect new parts for second quad. Since first one gone missing there is a transmitter – receiver left, battery charger, propeller set and some frame parts, I decided to build same quad. Today new battery arrived and motors. ESCs are already here. ECU is on the way – decided to use same KK2.1.5 board. Now I still need to order frame,…[Read more]
Lost my quad yesterday. I couldn’t find it so far. It happened because accelerometer of KK2.0 was faulty. It seems that sensor stuck at some level. LCD was showing sensor error. After searching on the internet I found that gentle hammering makes it work. It did, but not for long. After take off I lost control of flight and it wen away for about…[Read more]
Well I’ve figured out things. It seems that I wasn’t paying enough attention to what I was doing. First of all I needed to calibrate ECS so they would accept throttle evenly. Second thing (dull!) I placed props upside down – this is why I couldn’t take off. Third thing because of this I messed up transmitter settings. After I took care of all this…[Read more]
Just figured out that KK2.0 controller firmware was too old (ver 1.2). Reflashed to v1.6 with http://lazyzero.de/en/modellbau/kkmulticopterflashtool
Still no luck to get to sky. Ordered bigger props – another week or two of waiting.
Assembled the quad, but it seems that it doesn’t have enough lift. overall weight is about 1300g. 9047 props might be too small. Will try with bigger props like 10×5 or so.
Also KK2.0 flight controller needs further setup as it is hard to get balance between motors.
Still waiting for ESC replacement. Controller is KK2.0 Which I think is a great choice for price and functionality. LCD on board definitely is a big + because you can change parameters on field without need of computer.
Will share more info once I do fly test.
Contest has ended. There are four participants:
Now I am going to pass this list through http://www.randompicker.com/ and post results. Then I will send an email to winner for shipping address details.
Good luck to everyone
Contest is nearing the end. I am thinking to draw winner by using http://www.randompicker.com/ website. This will prove that draw will be legit.
Each of participants will have equal chance (no weights added). The results and link to results will be published here on March 20.
There is still time to log-in and give a chance. So far there are…[Read more]
Today I almost had it running. But somehow I accidentally connected one of ESC in reverse polarity and magic smoke appeared. Burned one sadly I haven’t had one spare. So ordered couple and keep waiting. Shit happens!!!
If you would like to learn programming Tiva C launchpad, you could try online course (https://www.edx.org/course/utaustinx/utaustinx-ut-6-01x-embedded-systems-1172) which teaches how to program those boards using Keil. I have tried it and it’s fun. Speaking of C or C++ _ core functionality is same. but hardware specific functions may differ like…[Read more]
Controlling sensor ground with micro might be a good solution to prolong sensor life. Only minor change is needed. Thanks for the hint.
Contactless sensors are more complex to build and install, so didn’t try to go that way. Solar heater tank has a small diameter hole on side so such electrode seems good choice right now. If this will fail, then…[Read more]
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