Blogroll
-
Recent Posts
Archives
- April 2021
- July 2018
- June 2018
- May 2018
- December 2017
- September 2017
- August 2017
- February 2017
- June 2016
- May 2015
- April 2015
- March 2015
- December 2014
- October 2014
- September 2014
- June 2014
- May 2014
- April 2014
- March 2014
- February 2014
- January 2014
- December 2013
- November 2013
- October 2013
- September 2013
- August 2013
- July 2013
- June 2013
- May 2013
- April 2013
- March 2013
- February 2013
- January 2013
- December 2012
- November 2012
- October 2012
- August 2012
- July 2012
- June 2012
- May 2012
- April 2012
- March 2012
- February 2012
- January 2012
- December 2011
- November 2011
- October 2011
- September 2011
- August 2011
- April 2011
- March 2011
- February 2011
- January 2011
- December 2010
- November 2010
- October 2010
- September 2010
- August 2010
- July 2010
- June 2010
Meta
Tag Archives: phototransistor
Arduino reading screen flashes
I’ve upgraded the hardware to include two LEDs in addition to the phototransistor. Based on the reading of the screen flashes, the LEDs flash according to the key shown. Here’s a video of the system in action: This is at … Continue reading
Arduino Phototransistor Signal Protocol
I’ve designed a signal protocol for the Arduino to convert phototransistor readings from the laptop screen into bytes of data. Here’s what I came up with today: In the illustration, the white boxes in the black strip are light pulses … Continue reading
Arduino reads screen flashes with phototransistor
This is the first test of the communication system as described in the previous entry. The flashes are one millisecond, followed by a one second delay. The serial monitor informs me that the microcontroller is able to count them. Here’s … Continue reading
Posted in Uncategorized
Tagged arduino, communications, phototransistor, processing, robotics
Leave a comment
Computer/Arduino Communication Via Phototransistor
Here’s the basic idea: I’ll send commands to the Arduino by flashing a rectangle on the screen and having a phototransistor on the Arduino read the light level. The above photo shows the test bed set-up. This is very similar … Continue reading
Posted in Uncategorized
Tagged arduino, Atmel, communications, phototransistor, robot, robotics, serial-ttl
1 Comment
Arduino Cheapbot gets a Mini Breadboard Makeover
Videos of delivery guys gone wild may be viral these days, but Santa Zero was good to me and delivered these presents intact and on time. They will help in making my cheapbot kit a reality. I’ve only just browsed … Continue reading
Posted in Uncategorized
Tagged arduino, arduino internals, cheapbot, mini breadboard, phototransistor, robot, robotics
Leave a comment
Arduino robot with phototransistor mode switch (attempt #1)
I have a program (aka ‘sketch’) which steers my arduino robot (ie, cheapbot) in a square path. I revised it to use a phototransistor as a mode switch between standby and act (ie, move) modes. Originally, I used the delay() … Continue reading
Posted in Uncategorized
Tagged arduino, cheapbot, mode switch, phototransistor, robot
Leave a comment
Phototransistor as robot mode switch
Here’s the thing about cheapbot: as soon as you program it, it wants to go. It really needs a mode switch with two modes: one to accept commands, and the other to execute them. Also I want to be able … Continue reading
