Type in the full discussion title or a part of it.
Discussion Title Created date
Simple op amp circuit very noisy
I made a simple voltage follower on a breadboard with an audio op amp (LME49726) and I'm getting so much noise that the audio signal is barely intelligible at the output. This is...
Monday, 17 October 2016 - 18:07
Attiny88 Reset pin problem
I tried to program the Attiny88 (32 QFN package) using Atmel Studio 7 and I got the error that reading the device ID failed and there is an unexpected device signature ...
Sunday, 2 October 2016 - 03:21
Lithium Ion charge controller, blinking charge status
I'm using the MCP73831 (http://ww1.microchip.com/downloa...) Lithium Ion Charge Controller with a lithium ion coin cell battery (LIR2450). It has a charge status output...
Friday, 29 July 2016 - 18:01
Attiny88 I2C write to DAC not working
I'm trying to get the Attiny88 to write to a DAC (MCP4725, datasheet: https://cdn-shop.adafruit.com/da...). The code runs but I can't get the DAC to output the voltage I'm...
Monday, 18 April 2016 - 03:23
Device ID Failed using Atmel Studio 7 with Atmel-ICE and Attiny88
I just got the Atmel-ICE Basic and I'm using it with Atmel Studio 7. I'm programming the Attiny88 and I get the error "Reading device ID...Failed!" when I try to read the device...
Sunday, 10 April 2016 - 05:50
Audio amplifier question
I'm using a MEMS microphone breakout board (https://www.sparkfun.com/product...) and it has an op-amp circuit that boosts the signal to a line level that can be read by a...
Thursday, 10 March 2016 - 21:41
Attiny84 sleep mode question
I'm using the Attiny84 in the Arduino IDE, and this is my sleep function:   void sleep_function(void) { sbi(PCMSK1, PCINT8); //enable interrupt again set_sleep_mode(...
Tuesday, 1 December 2015 - 06:05
What is wrong with this MEMS microphone circuit?
I am using a MEMS microphone in my circuit, and I'm not getting any AC signal at the output! There is only about a 0.9V DC voltage at the output. Does anyone have insight as to...
Tuesday, 24 November 2015 - 00:52
MEMS Microphone design questions
I want to use a MEMS microphone in my circuit and I have some questions.   I started off with this MEMS Microphone Breakout- SPW2430 (https://www.adafruit.com/product/...
Saturday, 31 October 2015 - 00:03
Attiny84 Reset pin question
I'm using an Attiny84 and I set the fuse to disable the RESET pin, but left the pin floating. Is it okay to leave the pin floating because reset is disabled, or should I also...
Sunday, 27 September 2015 - 20:00
microphone amplifier circuit problem
I'm using the electret microphone amplifier circuit shown in the attached schematic (mic_amp.JPG), and I'm getting an unexpected result at the amplifier output. I was in a quiet,...
Saturday, 26 September 2015 - 07:00
design help for choosing AVR for audio project
For my application, I only need about five seconds of audio to play from a speaker, but it has to be high quality, so I don't want to use a cheap microcontroller with a low...
Monday, 3 August 2015 - 03:57

Pages