About My kids have a plastic farm toy. It neighs, it baas, and frankly, it grates. But since I tricked it out with a microcontroller brain, at least it can play Simon. One of the marvels of parenthood is the sheer volume of noisy plastic junk that gets thrown your kids’ way. It makes tremendous hacking […]
Playing Simon On A Hacked Farm Toy Read More »
What a pull-up actually does A microcontroller input pin is a very high-impedance sense node. With nothing connected, it does not read “high” or “low” — it reads whatever charge happens to be sitting on the pin, which is why a floating input picks up nearby switching noise and produces a stream of random edges.
Pull-up Resistors explained Read More »
You will get this done in 30 min. Step 1: Parts 1. 1 X any type of circuit board 2. 1 X Atmel AVR Atmega16 microcontroller 3. 8 X 330 ohms Resistors 4. 8 X LEDs 5. 1 X AVR Programmer (just use for download the code, i used a STK500) Step 2: Build the
Beginner's Guide – AVR Programming Read More »
This instructable will show you how to make a thermometer that displays the temperature of the air. It’s not the most accurate thermometer in the world, but for this price and the fact that it was homemade… This instructable will show you how to make a thermometer that displays the temperature of the air. It’s
DIY Digital Thermometer Using ATMega8 Read More »
When flashing with digital compact cameras, the camera usually uses several small flashes before making the actual picture. This is o.k. if the built-in flash is the only flash you have, but if you want to use an external second flash you have a problem: The second flash, also called slave-flash, fires if the master-flash
Slaveflash-trigger for digital cameras with Attiny24 Read More »
This instructable will show you how to interface a 16-key keypad to your AVR microcontroller and read the key when a key is pressed. I’ll introduce the keypad first, then the 74HC922 16-key decoder IC as a pin-saving mechanism, then finally how to take the data and massage it so that you get the correct
16-key Keypad Decoding with an AVR MCU Read More »
Did you make a mistake while programming fusebits, or purposely disabled reset pin (RSTDISBL) or ISP programming (SPIEN)? No need to buy or make inconvenient HV programmer only for unlock couple of Tiny AVR’s. This Attiny fusebit HV doctor will cure your dead tiny microcontrollers, by restoring all fusebits to factory settings – nice and
Repair dead AVR's – Attiny fusebit doctor (HVSP) Read More »
This tutorial will step you through the process of creating a set of controllable and configurable traffic lights whilst also teaching you the basics of Arduino. Some knowledge is needed and I highly recommend reading and following through on most if not all of the pages of the following document, created by the wonderful Arduino.cc
Making a set of traffic lights Using Arduino Read More »
As most guys I don’t tell my wife that “I love you” as often as I should, but this little gadget will at least improve that situation as bit. So by combining a nice box and some hardcore electronics nerdiness I’ve made a nice christmas gift for my wife. The LoveBox is a small box
LoveBox – The box of love using ATtiny2313 Microcontroller Read More »
Have you ever been chugging away at a project(s) and the project keeps growing and growing, while you add more things to it (we call that a Feaping Creaturism)? On a recent project, I was building a frequency meter and added a five function signal generator/frequency synthesizer. I soon wound up with more switches than
How to Read Many Switches with One MCU Pin Read More »
