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Discussion Title Created date
clock cycle of Trig functions
Hi, I would like to know the clock cycle of the following functions inside the piece of code that I have posted in the bottom. Otherwise, is there a documentation I should be...
Friday, 27 November 2009 - 04:06
Non linear Sensor Reading
Most of the hobby sensors aren't linear, like the Maxbotix sonars that I have. For distances greater than two inches, the sonars output an increasing analog value proportional to...
Tuesday, 24 November 2009 - 07:36
current draw from multiple LED
Say I have 6 LED that I want to turn on and off. They are actually the LEDs inside optoisolators. According to the datasheet, the optoisolators draw 60mA but the microprocessors...
Monday, 9 November 2009 - 09:35
PID Questions
Hi, I have a few questions regarding PID control. I am using a basic algorithm I found in wiki and here it is: previous_error = 0 integral = 0 start: error = setpoint -...
Thursday, 29 October 2009 - 19:00
Terminal to test Robot Behavior Software
I'm programming the robot that I built and am trying to implement an algorithm that I think would work really well. I'm using AT90USB646 on a Teensy Board, two sonars for...
Thursday, 29 October 2009 - 05:44
Multiple ADC Channels in Interrupts
Hi, I would like to use interrupts in reading sensor values for my robot to somehow introduce multitasking. So to do this using the ADC interrupt, do I basically have to increment...
Saturday, 24 October 2009 - 17:53
sound chip / text-to-speech for robot
What would be best to interface with an AVR used on a robot, some hacked sound chip with a microphone from RadioShack or a text-to-speech chip that communicates via UART? Does...
Monday, 5 October 2009 - 04:34
PID for Motor control
Hi, I would like to implement a PID control to my robot. My system is pretty simple. I have a sonar, and two motors. I've already successfully interfaced with both the Sonar and...
Tuesday, 8 September 2009 - 19:53
Two AVR talking via digital I/O Pins?
Hi, I've got one really quick basic question that I feel so dumb about not knowing, although mainly I just want to confirm what I read in the datasheet. Can I connect a digital...
Thursday, 3 September 2009 - 05:06
Arduino boards
What are arduino boards? I've been on the website and it looks like it runs on something besides C but it has Atmega as a microprocessor. I was wondering, if it does run on a...
Sunday, 30 August 2009 - 05:39
USART pins not enough
Hey guys, I have one big problem. Is there a way to expand the UART if there's not enough lines? I need more RX and TX pins but the development board I'm using has not enough RX...
Friday, 28 August 2009 - 02:23
Oscillator at low VCC supply
I have a Teensy++ board that has an external oscillator rated 16MHz and has the avr chip AT90USB646. The AT90USB646 spec sheet says it can be powered with 2.7 to 5. I will be...
Friday, 28 August 2009 - 00:27

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