Monday, November 23, 2015

IOIOcar p1 oops boards for free

Due to a PCB manufacturing error I'm currently overstocked on IOIOcar p1 boards and I'm giving them away! That's right free! These boards work just fine for the IOIOcar functions, they just have an incorrect hole spacing in the prototyping area. If you pay for shipping then I will send you one PCB for free.

Consider these "limited edition" since I've designed a new board and won't be making any more like this. Leave a comment or get in touch if you're interested.

You will need the parts from the BOM to complete the board:

More details might be found on GitHub.

Here is a table showing the IOIO pins utilized.

IOIO PinIOIOcar Function
3UART RX (gps tx)
4UART TX (unused)
39Servo power relay
40ESC PWM output
41Servo PWM output

Get autopiloting!

Sunday, October 4, 2015

AustinROV: For real this time

AustinROV: For real this time: We took the ROV to the San Marcos River today at La Isla. This is sort of how it went, though it doesn't tell the whole story.

Monday, September 7, 2015

Introducing IOIOcar

Here are the beginnings of my entry for the Sparkfun AVC in 2016. My vehicle doesn't have a name yet and I am looking for suggestions. I'm releasing all of my source code and hardware designs to encourage openness and competition. Check out my github for the files. On the right you can see a picture of the electronics plate for mounting the brains to a Traxxas Rustler.

On the hardware side, I've developed a PCB that I call the IOIOcar. This is a board that connects Ytai's IOIO to a couple of servos and a relay. I'm using OSH Park to produce the PCBs and selling kits here.

The software is written in Java using Android Studio. The Android phone (or tablet?) provides many sensors and GPS which come in handy for navigation. Importing the "android" folder from github should be all that you need to do to get started.

I was planning on selling kits but nobody was interested. 

Monday, March 16, 2015

Art car 3

I've been working on benches for the rocket car. These are 2"x8" lumber bolted to 1"x1" ladder framed steel bars.

You can view more details in the imgur gallery linked below.

Also, here is a video of the mostly ready flame effect.

Thursday, December 11, 2014

First pcb, woot

ghpi circuit board rendering
This is my first professionally made PCB. I designed it using in my spare time. OSH Park is producing the board and I will perform the assembly.

The board connects 1-wire temperature sensors to a Raspberry Pi for logging and display. There are also connections for an I2C/TWI display and an SPI RF24 wireless module. My plans is to release the source on github and sell kits. Please leave me a comment if you are interested in either one.

GHPi is what I am calling the project, which is currently in the prototype phase with my friends at Go buy some flowers from them.

Wednesday, December 10, 2014

Maiden fpv quadcopter flight

On 12/2/2014, I was finally able to fly my maiden fpv circuit through my backyard. This wasn't my first flight with the quadcopter or first time seeing the FPV video but it was the first time I flew the vehicle directly from the video feedback. The feeling is awesome and I can't wait to try this out on my airplane when conditions are right.

The quadcopter is a HobbyKing fpv250 and isn't strong enough to fly with a gopro. I haven't received my C-DVR yet, so I wasn't able to record the slightly frightening flights.

"The AMA FPV spotter must communicate with the FPV pilot to ensure the FPV aircraft remains within VLOS, warning the FPV pilot of approaching aircraft, and when avoidance techniques are necessary."

I need a spotter.

In total I lost three propellers. One was damaged due to a sudden and unexpected hard landing. The next was lost due to over tightening the new propeller onto the motor. I have seen these GemFan 5x3x3 propellers explode when spinning up so I don't risk running cracked or stressed GemFans. The last prop was lost due to a collision with a tree, which also pulled off a landing gear and the mounting hardware for the propeller. I could have also lost a landing leg but was able to find it.

I need to collect spare parts like propeller nuts and washers, landing gear and more propellers. This stuff should go in a case with the quadcopter.