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Too much current out of flyback converter, how to reduce it ?
Hi,   I'm designing a fan that is supplied through a step-up flyback converter (5V > 12V LM2585 from TI).   A USB cable is connected to one USB3 port from my...
Tuesday, 17 November 2020 - 15:10
Pin change interrupt not working , atmega 328p
Hi,   I Try to turn a led on through a pin change interrupt.   I watched this tutorial :  https://www.youtube.com/watch?v=w37FOUrXO6s   My code is :   #...
Friday, 27 March 2020 - 11:05
Atmega328p alternative Chip Select pin Problem
Hi,   I'm trying to control a digital pot with a rotary encoder.   The digital pot works through SPI communication.   When I use the SS pin from the ATmega328p it...
Tuesday, 17 March 2020 - 18:29
Rail to rail opamp problem
  Hi, I got this signal coming from a source. Vpp = 0.65V. This signal feeds the non inverting input of an opamp (TL974). I supply the opamp with +5V and -5V. The circuit...
Monday, 16 March 2020 - 09:34
Impossible to read fuses on ATmega32A (AVRDUDES + USBASP)
Hi,   When I want to read the fuses of an ATmega32A (or ATmega16A), AVRDUDES says : " efuse" memory type not defined for part "ATmega16". Is the problem coming from the...
Thursday, 25 July 2019 - 22:03
Sampling rate + reconstruction question
If I generate a 20Khz digital sine wave with a microcontroller, outputing each sample at a rate of 44.100Khz, I don't understand how I can get a sine wave since I'm going to have...
Tuesday, 7 May 2019 - 17:13
Arduino Kit Rotary Encoder + ATmega32 + USART with RealTerm > Nothing shows up on the serial monitor
Hy,   I'm trying to increment and decrement a variable when turning a rotary encoder and to display the value on a serial monitor (RealTerm).   The rotary encoder is the...
Monday, 14 January 2019 - 11:22
2700 in the cycle counter (AVR Studio 4) for a multiplication and a cast with an ATmega32, why so much ?
Hy,   I'm coding a DDS algorithm for an ATmega32. At each loop the uC has to multiply a const float to a long, and to cast the result to get an int. This int...
Monday, 26 November 2018 - 23:31
ATmega32 Timer not accurate for a sine wave with 10 bit DAC
hi, I try to get a 1KHz sine wave with an ATmega32 and a 10 bit R-2R DAC.  I put 100 sine value in a table and I use a timer so that each time the timer counter overflow, the...
Friday, 19 October 2018 - 08:19