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Temperature controlled fan using ATtiny13A
Hi, I have ATtiny13, for which I painstakingly built a evaluation board, along with it I also built a simple driver using TIP122 to drive a 12V DC fan. I take temperature reading...
Tuesday, 7 January 2014 - 19:19
Varing PWM duty cycle when using timer0
With ATmega644 when I used Timer1 I use ICR1 to set the TOP and then use OCR1A and OCR1B to vary the duty cycle on each channel. But if I want to use Timer0 i.e. 8-bit and there...
Friday, 27 December 2013 - 15:28
Unable to make timer2 work on atmega644p
Hi, I switched from atmega32 to atmega64. After changing the register names i hoped that it will work like it worked with atmega32. but some how I am not able to make timer2 work...
Monday, 23 December 2013 - 22:17
Out of timers for HCSR04
Hi I am using an ATmega32@11.0592MHz. I have all three timers used, timer1 for PWM for two motors, timer2 for Servo PWM and timer0 for PID sampling. timer0 has a compare match...
Friday, 18 October 2013 - 20:09
Bluetooth UART control need help tweaking
Hi, Today I could successfully replace my MAX232 with a HC-05 bluetooth module, it worked great but I have few issues with it. I didn't change any thing on HC-05 using AT mode (...
Sunday, 6 October 2013 - 10:44
Memory allocation inside ISR
Hi, I was just wondering, what is efficient? - declaring a temp variable inside ISR. or - declaring it as a global variable and use as temp variable in ISR. Thanks, K
Thursday, 3 October 2013 - 19:06
IR Obstacle Detector interface to Atmega32
Hi I have a NSK OBSTACLE DETECTER ver2.0 - PWM Based , there is not much information, but i had a talk with the guy who designed the module (He has a store near my place) and he...
Tuesday, 6 August 2013 - 10:02
Battery charger
Hi, I have replaced battery of my UPS and now I have a working 12V 7.2AH SLA battery. It would damage if it is not charged over a period. so I decide to make a DC 12V UPS for my...
Saturday, 20 April 2013 - 04:36
Two Atmega8
Hi, This is just a thought. With my Atmega8 i always run out of GPIOs or EXT-INTs or TIMERS. Can I combine two MCUs on the same CRYSTAL to be in sync. 1. What is Daisy Chain? 2....
Wednesday, 20 March 2013 - 21:13
read portb
Hi This one is silly but I am not able to figure out this bitwise operation. I connect four sensors to lower nibble of portb pb0:3 on atmega32. I am able to read each bit, I am...
Tuesday, 19 March 2013 - 20:33
Function calls
Hi, I want to know what is expensive, making two functions or having a single parameter and if loops. see below void motor_left_dir(uint8_t direction){ ... } void...
Tuesday, 19 March 2013 - 13:25
4 IR sensors
Hi, I use ATmega32A. I want to interface 4 Modulated IR proximity sensors. 3 in front (left center and right) one at rear (center). right now I read them in my main loop and...
Sunday, 17 March 2013 - 12:29

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