While I was finalizing e-snowflake project, I imagined that single RGB 5050 LED would create nice rainbow effect if placed inside a ball like ping-pong. You can find plenty of such projects on the net, this one was heading to embed everything within ping-pong, battery included. The design challenge was to create PCB small enough […]
This instructable describes how to charlieplex a bunch of 7-segment led displays. Charlieplexing of discrete leds has been the topic of a few other instructables. The Charlieplexing LEDs- The theory and the How to drive a lot of LEDs from a few microcontroller pins comes to mind. They are both excellent and should be read
Charlieplexing 7 segment displays using Microcontroller Read More »
Nokia manufactures a wide variety of cell phones and many of their cheaper phones contain simple LCD’s which may be used in microcontroller projects. There is one particular LCD model that is used in a wide variety of their phones and is often referred to as simply a “Nokia LCD“, or “Nokia 6100 LCD”. I
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
Component Required: IC1 – MT8870 DTMF decoder IC2 – ATmega16 AVR microcontroller IC3 – L293D motor driver IC4 – 74LS04 NOT gate D1 – 1N4007 rectifier diode R1, R2 – 100-kilo-ohm R3 – 330-kilo-ohm R4-R8 – 10-kilo-ohm C1 – 0.47μF ceramic disk C2, C3, C5, C6 – 22pF ceramic disk C4 – 0.1μF ceramic disk
If you’d like to test the waters of microcontroller programming, the new AVR Dragon by Atmel Corporation is a nifty, low-cost entry-level development tool. Unfortunately, right out of the box, the AVR Dragon is not the definitive answer for the beginner looking for an all-in-one solution. Rather, the AVR Dragon is a great microcontroller programmer
An Absolute Beginner's Guide to 8-Bit AVR Programming-AVR Dragon Read More »
This is a mutli-mode clock project based on attiny2313. it employs a 8×8 led matrix as display. with the limited resolution, this 12 hour clock shows time in 6 different modes. The circuit employs row and column multiplexing to drive the leds, one row at a time, this gives a 12.5% duty cycle when “sets”
Description Features: Measures temperatures from -55°C to +125°C Three LED’s to indicate in what range the temparature is. User definable thermostat with high and low settings Output via a relay to control a heater element or a blower fan (or something else) Power supply ………………….4.5 to 5.5 VDC Power consumption ………..15mA This circuit uses a
Temperature Indicator Using attiny2313 micrcontroller Read More »
Description With this circuit you can drive a unipolar stepper motor. It operates in full step mode. You can get a stepper motor from an old 5.25 disk drive. The AVR attiny2313 micro controller controls the pulses for the stepper motor. The pulses are amplified by the ULN2003 driver. The driver accepts 5V inputs, the
Stepper motor Driver Using AT2313 microcontroller Read More »
Description This is a peripheral board with 4 relais, rated at 5A/250V each. The board has a ML10 output connector for connection with the AT2313 Project board. It has also 4 LED’s for indication which relais is switched on. Hardware The circuit is simple, it consists of no more then an ML10 connector, a ULN2803A,
