Category: AVR

Smart Power Bank Keep-Alive

Ever wanted to power a project from a USB power bank, only to have it keep shutting itself off because the current draw was too low? This project aims to fix that with these handy and slightly over-engineered USB modules containing a microcontroller, op-amp, MOSFET and a few other bits to create a pulsed adjustable …

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Remote Mail Notifier (and GPS Tracker)

At the moment I’m living in a block of flats and my mailbox is in a central lobby area. I’m often receiving small surprise packets from China and never know when the postman has been, usually between 8 and 12, sometimes even twice a day! I also don’t have any road facing windows that I …

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A Tiny Electronic Dice

Here’s a simple, tiny electronic dice project using 7 LEDs, an ATtiny25V, a CR1616 coin cell and a few passives. Measuring just 18mm x 18mm and 4.9mm thick while weighing 2.1g. Rolling The Dice There’s only one button, the roll button, which when held down will cause the dice to roll through numbers 1 to …

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USB Power Switch and Filter

What’s more annoying than having to pull the USB cable every 5 seconds to power cycle the project you’re working on? Especially when you’ve ran out of front USB ports and have to reach around the back of your PC. This project aims to make things a little bit easier by using a small push …

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Car Rev Alarm and Gear Indicator

Having had a Toyota GT86 for a while I quite enjoyed the built-in rev alarm and winding the engine all the way round, until an old lady made it an insurance write off. Though, I did have the luxury of driving a BMW 430d M Sport hire car from my insurance for a few months. …

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Si4463 Radio Library for AVR and Arduino

This is a library for use with the Si4463 radio IC from Silicon Labs, used (or will soon be) in some of my projects. The Si4463 is configurable in a ton of different ways with options for modulation, packet format, CRC algorithms and has a high output power of up to +20dBm (100mW). The Si4463 …

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AVR-GCC 9.2.0 for Windows 32 and 64 bit

This is where I’ll be uploading builds of AVR-GCC for Windows 32 and 64 bit, which will also include Binutils, AVR-LibC, AVRDUDE and Make. I’ll be trying to keep the builds up to date with the latest tool releases when I can.

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DIY Digital Wristwatch

Introduction The main incentive behind this project was to see how much I could cram, in terms of both hardware and software, into a wristwatch-like device that is no larger than the display itself. An OLED display was chosen for being only 1.5mm thick and not requiring a backlight (each pixel produces its own light), …

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AVR USB RGB LED Controller

While working on an update for my CPU Usage LEDs project I thought why not just make it into a universal RGB LED controller? The CPU Usage LEDs controller took a value between 0 and 255, worked out what colour it should be and then fade to that colour. This was very limiting; changing what …

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Bluetooth Net Monitor v2

This post only goes over the new stuff in the network monitor, I’d recommend having a look at the original post first. New PCB design The new PCB is now an almost single board design, just a separate board for the USB connector. The old monitor had a small main board which connected to the …

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