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Archive for the ‘AVR’ Category

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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‘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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LED traffic light

Wednesday, January 18th, 2017

Domen Ipavec shared his DIY LED traffic light in the project log forum: Traffic lights are all around us, and they seem simple enough but are they really? Real traffic lights can be a very complicated system because it requires sophisticated control and coordination for smooth and safe traffic. The...

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Posted in AVR, project logs | No Comments »

Adding ADC to Microcontrollers without ADC

Thursday, September 15th, 2016

Scott Harden writes: I recently had the need to carefully measure a voltage with a microcontroller which lacks an analog-to-digital converter (ADC), and I hacked together a quick and dirty method to do just this using a comparator, two transistors, and a few passives. The purpose of this project is...

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An AVR Atmega library for multiple HD44780 based LCD connected through i2c

Thursday, August 4th, 2016

Davide Gironi has posted an I2C multiple HD44780 AVR Atmega library: This library implements a driver for HD44780 lcd connected through PCF8574 port expander. Data is transmitted using only 2 wire over i2c with the PCF8574. This library can drive up to 8 LCD concurrently. Lcd driver is based upon...

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Posted in AVR, library | No Comments »

Atmel Retrokit SAM D Edition

Saturday, July 16th, 2016

Dan Watson has published a new build, the Retrokit SAM D Edition board: I created a 2016 re-design of the Retrokit that uses the Atmel SAM D09 microcontroller. This is an excellent 32-bit device that comes in a SOIC package, making it easy to solder. I mimicked the board size...

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ATtiny based bidirectional motor control using L293D

Friday, July 1st, 2016

Rahul over at Xanthium has posted a tutorial on interfacing ATtiny with L293D: In this tutorial we will learn to interface L293D with ATMEL ATtiny microcontroller and control them bidirectionally.The microcontroller used here is ATtiny2313A which is interfaced to two L293D motor control chips for controlling upto 4 DC brushed...

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Touchpad as wireless (MIDI) expression controller

Friday, May 27th, 2016

Acidbourbon has published a new build, a wireless touchpad that can be used like an expression pedal: This sort of touchpad speaks some special Apple mouse protocol. Luckily I found a code snippet on mikrocontroller.net which helped a great deal to get the thing going. Then I used a standard...

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