Search found 8 matches

by cdude1990
Thu May 12, 2016 4:41 am
Forum: Sparkfun Promotions and Competitions
Topic: AVC 2016
Replies: 10
Views: 6297

Re: AVC 2016

Yeah, same question. The Edison doesn't have enough voltage for this, so I'm thinking to use 4 AAAs and mounting with duct tape. I assume only two wires from the servo are used. It would be awesome to buy the transponder ahead of time.
by cdude1990
Sun Mar 27, 2016 9:34 am
Forum: Sparkfun Promotions and Competitions
Topic: AVC 2016
Replies: 10
Views: 6297

Re: AVC 2016

Will the obstacles for classic AVC be reused from last year, the stanchions, barrels, hoop, and ramp? Will they be the same colors?

Shape detection is tough enough even if you know what the shapes are. :think:
by cdude1990
Tue Mar 15, 2016 8:19 am
Forum: SparkFun Product Questions
Topic: Dual H Bridge noise
Replies: 0
Views: 177

Dual H Bridge noise

As soon as I call standby(false) one of my motors makes a high pitched squealing noise. I hooked it up to an oscilloscope, and the block is sending 5 microsecond pulses of 0.25 volts, maybe 5000 times a second. My stack has: Edison Base Battery 9DOF GPIO (using pins 44, 45, 46) Dual H Bridge This is...
by cdude1990
Sat Dec 05, 2015 8:17 am
Forum: Sparkfun Promotions and Competitions
Topic: AVC Rule clarification
Replies: 2
Views: 2405

AVC Rule clarification

I would like clarification on this part of the rules (quoted from 2015): >>No transmitters or communication beacons (other than GPS) of any kind are allowed. You may NOT tether to a laptop or other device. Everything necessary for the vehicle’s navigation/processing/sensing must be attached and part...
by cdude1990
Sun Oct 04, 2015 7:42 am
Forum: SparkFun Product Questions
Topic: Edison pin conflicts
Replies: 1
Views: 228

Re: Edison pin conflicts

Here's the response from Sparkfun support: Thank you for contacting us! I checked with the engineer for the OLED Block, and he believes that it is incompatible with the H-Bridge. On the H-Bridge, pins 14 and 15 connect to the level translator pins on the TXB0108. This controls the BIN1 and BIN2 inpu...
by cdude1990
Sun Sep 20, 2015 8:01 am
Forum: SparkFun Product Questions
Topic: Edison pin conflicts
Replies: 1
Views: 228

Edison pin conflicts

My Edison stack has Edison, battery, base, 9DOF, GPIO, dual HBridge, and OLED. I use the GPIO for a single GP input for a wheel encoder. I found that all of the GP pins conflict with other blocks. I learned that when one motor turned red hot :evil: and another was whistling :whistle: So here's my th...
by cdude1990
Sun Jul 05, 2015 1:55 pm
Forum: SparkFun Product Questions
Topic: Redbot accelerometer and vibration
Replies: 3
Views: 271

Re: Redbot accelerometer and vibration

I don't think it is electrical noise. I hooked up the accelerometer to an oscilloscope. There was little fluctuation when the motors were turned on. There was a voltage drop of 0.2V, well within the specs of the MMA8452Q. I tested the vibration hypothesis by removing the motors from the chassis and ...
by cdude1990
Sat Jul 04, 2015 1:54 pm
Forum: SparkFun Product Questions
Topic: Redbot accelerometer and vibration
Replies: 3
Views: 271

Redbot accelerometer and vibration

I have the Redbot kit and I'm trying to use the accelerometer. It seems like vibrations make the readings almost meaningless. Below are my code and some outputs in various configurations. For all of these runs, I had the Redbot standing upright so the wheels are spinning in the air. For the 'isolate...