Search found 1065 matches

by strud
Fri Dec 04, 2020 9:24 pm
Forum: How's the Weather..?
Topic: Free Online Resources during times of self isolation
Replies: 3
Views: 812

Re: Free Online Resources during times of self isolation

Embedded development tools: Platform IO running within Visual Studio Code https://code.visualstudio.com/ https://platformio.org/ There are some great tutorials here at Random Nerd Tutorials, indeed explaining step by step how to get platform IO running in VS Code https://randomnerdtutorials.com/ Of ...
by strud
Tue Dec 01, 2020 5:15 am
Forum: Low Powered Rocketry
Topic: Ali express rocketry
Replies: 1
Views: 1542

Re: Ali express rocketry

Awesome, nice looking rocket for sure.

Adaptation is key nowadays :-)

Check out this little micro hybrid design, something else you might be able to use in this diameter and cheap to run;

http://www.aeroconsystems.com/motors/Screamer_folder/screamer.htm
by strud
Wed Nov 25, 2020 7:56 pm
Forum: Electronics
Topic: Rocket tracker & monitoring thing
Replies: 36
Views: 5363

Re: Rocket tracker & monitoring thing

Have the first RocTrak rev0.3 together now, and firmware modified to utilise the ublox SAM-M8N module Top side: ublox SAM-M8N module (to the right of the SMA connector) is the main change here, but have also gone from a large tantalum to 3x 100uF ceramic caps for the radio supply bulk capacitance (l...
by strud
Thu Nov 19, 2020 9:27 pm
Forum: Electronics
Topic: Boost converters
Replies: 5
Views: 846

Re: Boost converters

My boards arrived a week ago and managed to get some time to get one together and test it out. They are quite small at 30 x 15mm and fairly easy to assemble except for the switching reg which you really have to reflow. http://drive.google.com/uc?export=view&id=1ecZBtHFf41iSQTzr_JYayZg36OWyMGvs I...
by strud
Sun Nov 15, 2020 10:12 am
Forum: Scratch Built
Topic: Avionics bay for HPV4PoC
Replies: 19
Views: 2421

Re: Avionics bay for HPV4PoC

Put together a bit of a summary video of the Avbay to date

by strud
Tue Nov 10, 2020 11:19 pm
Forum: Electronics
Topic: Rocket tracker & monitoring thing
Replies: 36
Views: 5363

Re: Rocket tracker & monitoring thing

So while I'm waiting for the the boost converter and RocTrak 0.3 boards to arrive, I have got the 'draft' design of the 2.0 version done. This is using an ESP32 WROOM module instead of the devkit type boards, meaning the overall height comes down a LOT. I've also replaced the DTMF chip with the SSOP...
by strud
Thu Nov 05, 2020 4:39 pm
Forum: Electronics
Topic: Rocket tracker & monitoring thing
Replies: 36
Views: 5363

Re: Rocket tracker & monitoring thing

Next iteration of board done, including the following changes and additions: 1. ublox SAM-M8 GPS module with integrated patch antenna 2. RF blocking filter (T) on Radio power supply pin 3. PTT fet gate pull down resistor (was seeing the PTT input being pulled low during programming etc) 4. Baro sens...
by strud
Fri Oct 30, 2020 9:38 pm
Forum: Electronics
Topic: Arduino Radio Beacon
Replies: 3
Views: 875

Re: Arduino Radio Beacon

Hey there DiscountBatman (love the name by the way) a LoRa module might be hard to get to modulate in a simple FSK mode that will be demodulated by say a UHF handheld radio, since it is designed to operate with a very broad spectrum transmission as I understand. Also the encoding schemes will also n...
by strud
Tue Oct 27, 2020 4:52 pm
Forum: Electronics
Topic: Rocket tracker & monitoring thing
Replies: 36
Views: 5363

Re: Rocket tracker & monitoring thing

Time for an update on this, it's been too long... So Drew has been kind enough to fly the rev0.1 and rev0.2 versions of hardware, each using a variant of the MTK3339 chipset with built in patch antenna. The results have been not great for these, even for the second unit (which had GPS Uart RX connec...
by strud
Fri Oct 23, 2020 1:17 pm
Forum: Scratch Built
Topic: Avionics bay for HPV4PoC
Replies: 19
Views: 2421

Re: Avionics bay for HPV4PoC

Connected up all power to everything and SmartSwitch unit to RocTrak. Couple of solder issues with the power monitor IC and a few code tweaks and now the little webpage shows useful battery/power details http://drive.google.com/uc?export=view&id=10DSy91zf3iwNfX85ZG1DfTWaxv2fXkbJ Ch1: Has the Roc...
by strud
Tue Oct 20, 2020 7:22 pm
Forum: Higher, Faster, Further
Topic: Vertical Trajectory System (with some 3D printed parts)
Replies: 77
Views: 52091

Re: Vertical Trajectory System (with some 3D printed parts)

Hi OTT Pretty interesting project there :-) Regarding gain schedules and implementing something to give you a relatively consistent control loop response, I did implement something very much like this for a roll control system many moons back that was able to maintain the natural period and damping ...
by strud
Thu Oct 15, 2020 10:58 pm
Forum: Scratch Built
Topic: Avionics bay for HPV4PoC
Replies: 19
Views: 2421

Re: Avionics bay for HPV4PoC

Hey Ben, glad some of it might be useful... Getting close now, just a few minor things remaining such as GPS patch antenna mount and connecting up the SmartSwitchfor to the RocTrak module. A pic of each sector with ejection canon tubes removed FarTrak module (front centre), 5V boost converter (left)...
by strud
Fri Oct 09, 2020 7:46 pm
Forum: Electronics
Topic: Boost converters
Replies: 5
Views: 846

Re: Boost converters

Did find a nice alternative for mid power (say up to 1A cont) applications on the cheap. These super cheap boost converters have rather HUGE ripple with almost any load on them : https://www.aliexpress.com/item/32366166138.html?spm=a2g0s.9042311.0.0.11314c4d5nPJ1F https://ae01.alicdn.com/kf/HTB13lGM...
by strud
Fri Oct 09, 2020 6:45 pm
Forum: Scratch Built
Topic: Avionics bay for HPV4PoC
Replies: 19
Views: 2421

Re: Avionics bay for HPV4PoC

So I decided to mount the 18650 LiIon batteries this evening and came up with a pretty good compromise given the constraints. A piece of 2.4mm thick G10 was cutout such that the battery is a snug fit axially and sits with the OD of the battery is flush with the bottom of the G10. A pair of grooves a...
by strud
Fri Oct 09, 2020 12:19 pm
Forum: Electronics
Topic: Camera part 2
Replies: 2
Views: 871

Re: Camera part 2

So after Drew found these great Runcam Split versions, I went and got one myself. I now have one mounted in my 4" av bay and started digging more into their capabilities other than just recording great video. Turns out there is a nice serial interface protocol that allows full control of the ca...

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