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Archive for the ‘AVR’ Category

Use a MCP4728 DAC with AVR ATmega

Wednesday, July 3rd, 2019

AVR ATmega MCP4728 DAC library: The MCP4728 device is a quad channel, 12bit voltage output DAC. It also has EEPROM embedded. The DAC is driven using the I2C interface. This library implements an ATmega driver for this IC. More details on Davide Gironi’s blog. Check out the video after the...

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Tiny thermocouple thermometer

Thursday, May 16th, 2019

Johnson Davies built a tiny thermocouple thermometer based on an ATtiny85 measuring boiling water: This project describes a thermocouple thermometer, capable of measuring temperatures up to +1350°C, using just an ATtiny85 and an OLED display. More details on Technoblogy.

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HX711 load cell amplifier library for AVR ATmega

Friday, April 5th, 2019

A HX711 load cell library for AVR ATmega: HX711 is a precision 24bit ADC IC designed for weigh scales and industrial control applications to interface directly with a bridge sensor. A load cell is a transducer that is used to create an electrical signal whose magnitude is directly proportional to...

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Qi wireless power receiver from scratch

Tuesday, April 2nd, 2019

Vinod made a Qi wireless power receiver using Attiny13, that is available on GitHub: I have only two aims while trying this. The receiver should get powered by the transmitter continuously. I should be able to control the power received by adjusting the error packets, in my case I am...

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Programmable light controller

Monday, March 25th, 2019

Dilshan Jayakody published a new build: The main objective of this project is to design a maintenance free and low-cost light which automatically turns on and off at the predetermined time of the day. To meet the above requirement I designed this controller using ATmega8 MCU and DS1307 RTC. The...

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ATtiny13 – 8bit mono class D amplifier

Thursday, February 21st, 2019

Łukasz Podkalicki shared a how-to on building a Class D amplifier on ATtiny13: I always wonder whether it is possible to make an amplifier of class D on ATtiny13 or not. Some time ago I found George Gardner’s project based on ATtiny85 – TinyD. It was a sign to start challenging it...

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PiggyFuse HVSP AVR fuse programmer

Wednesday, May 16th, 2018

Nerd Ralph published a new build: Although I've been working with AVR MCUs for a number of years now, I had never made a high voltage programmer.  I've seen some HVSP fuse resetter projects I liked, but I don't have a tiny2313.  I think I was also hesitant to hook...

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Attiny85 pogo backpack programmer

Monday, May 14th, 2018

Facelesstech published a new build: So you are using a bare attiny85 in your next project but don’t have room for the programming header, What do you do? I came up with the idea of using pogo pins layed out on A PCB so that they will sit on top...

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Posted in Arduino, AVR | No Comments »

Attiny wearable

Monday, April 30th, 2018

Attiny wearable project from Facelesstech: It’s a foundation for a wearable platform. It’s a Nato watch strap threaded through a PCB with a coin cell battery holder between the PCB and the strap. I’m using a Attiny85 this time around but could be used for most chips/dev boards. This is...

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Posted in AVR, DIY | 3 Comments »

A web configurable ThingSpeak logger, build on AVR ATmega328

Thursday, April 19th, 2018

Davide Gironi posted an update on Xively logger project we covered previously: This embedded platform is a modular and configurable ThingSpeak data logger, built on an ATmega328 micro, usefull to send datapoints to your ThingSpeak feed. This project is an update to the Xively logger presented here See the full...

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AtPack: Atmel Pack parser, visualizer and fuse calculator

Tuesday, April 17th, 2018

  AtPack - Atmel Pack parser, visualizer and fuse calculator from Vagrearg: Looking for an up-to-date fuse-calculator for the Atmel(*) AVR chips has been something of a long search. There are several online versions, but they have not been updated to the new chips (like the ATmega328PB). When you have got...

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Posted in AVR, hacks | No Comments »

‘Daytime Running Light’ module (DRL) with ATtiny85

Friday, March 30th, 2018

Nicu Florica writes: A reader of my sites and blogs, Mr. Liviu Hinoveanu wanted to replace classical DRL module made with 555 with Attiny85 programmed in Arduino style. He send me the schematic and PCB designed with Livewire and PCB Wisard software After I undertand what module must work, I...

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Attiny85 backpack programmer header

Monday, March 19th, 2018

Facelesstech published a new build: So when I was into using just a atmega328 dip chip I make a programmer header for it that also had a crystal and the capacitors need to make it function. I wanted to do the same for the attiny85. As you know you have...

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0.000011574Hz: The ATtiny85 super-slow-clock Saturday detector

Tuesday, March 13th, 2018

Igendel writes, "What is the lowest possible clock frequency at which a microcontroller can still do useful work? Here’s a little project that attempts to explore this weird question." See the full post on his blog here, It's Every Bit For Itself. Check out the video after the break. (more…)

Posted in AVR | 3 Comments »

Ultrasonic audio transmitter and receiver system

Saturday, March 10th, 2018

An ultrasonic audio transmitter receiver system from Vinod S. Hi all, this is another mad project.  Aim of the project is to transmit laptop audio via ultrasound to few meters and then receive it and demodulate it and playback the audio on a speaker. See the full post on his blog....

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PS2-TTLserial adapter for RC2014 and MIDI

Monday, October 30th, 2017

Dr. Scott M. Baker published a new build: The original reason for this project is that I wanted to build a standalone RC2014 with keyboard and display. There is an official RC2014 serial keyboard, but I find it a little inconvenient for my big fingers and poor eyesight. I have...

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Microcontroller action potential generator

Monday, August 21st, 2017

Scott Harden writes: Here I demonstrate how to use a single microcontroller pin to generate action-potential-like waveforms. The output is similar my fully analog action potential generator circuit, but the waveform here is created in an entirely different way. A microcontroller is at the core of this project and determines...

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Posted in AVR, how-to | 1 Comment »

TTL triggered stimulus generator

Thursday, August 3rd, 2017

Scott Harden has a nice build log on his TTL triggered stimulus generator project: I was presented with a need to rapidly develop a pulse generator to take a TTL input and output a programmable output (for now 0.1 ms pulses at 20 Hz for as long as the input...

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SmallyMouse2 – Universal USB to quadrature mouse adapter

Tuesday, June 6th, 2017

Designed and built by Simon Inns, a universal USB to quadrature mouse adapter project - SmallyMouse2: SmallyMouse2 is a universal USB to quadrature mouse adapter for many 8-bit and 16-bit retro computers and allows the use of modern USB mice on machines such as the Acorn BBC Micro, Acorn Master, Acorn...

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Posted in AVR, USB | No Comments »

Electronic film clapper

Friday, June 2nd, 2017

Steve Smith from ProjectAVR has published a new build: On the board, I included several options to tailor the design to the builders taste. Provision for both a digispark board or bare ATTiny85 chip, small or large tact switches and a jumper to defeat the LEDs supply resistor for extra...

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Recent Comments

  • gant: They still have a couple of the more expensive (but still considerably cheap) 5S-I-S01 in stock...
  • readybrek: Anyone got a any recommendations for a budget-priced hot air station?
  • William: lol I'm happy to waste 3c for each program/debug cycle... but probably not the time spent soldering a new device down to a proto board!...
  • Joe Desbonnet: Ya, I can recommend the low melting point solder. I used brand 'ChipQuik' and it's amazingly easy to use.
  • Jerome: I need a new BusPirate for the Fablab ;) Many thanks!