A 1.5 Volt, 1970′s Style LED Flashing Red Caboose Marker Light using tiny...
A circuit that drives a red LED from a 1.5 volt battery and simulates an incandescent light. Duty cycle can be changed by selecting resistor values. Photo 1. This printed circuit board is 3 cm long....
View ArticleSimplest LED Flasher Circuit
As simple as it gets and still works This LED flasher occurred to me while reading about negative resistance in transistors. It was reported that Leona Esaki, who was at Sony at the time, had been...
View ArticleA serial interface for the Truly MTC-C162DPLY-2N using ATmega8515
The 10k potentiometer, just above the ISP connector near the lower middle of the board,is used to adjust the display contrast according to your vertical viewing angle. DOWNLOADS ATTINY2313/AT90S2313...
View ArticleCircuit and firmware to support Seiko-Epson G1216B1N000 dot graphics display...
A serial interface and bias supply for the Seiko-Epson G1216N000 using an AT90S2313 because there just aren’t enough applications examples for this display on the web. Download Assembler source code I...
View ArticleMultifunction 330 MHz Remote Control With an ATTINY2313 Simulating the PT2264...
This 330 MHz remote control sends timed sequences of control pulses to accomplish complicated tasks. You can probably tell that I used a lot of solder flux on this board. Lots of flux not only helps...
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DIY mobile phone – Create your own mobile phone
This DIY cell phone created at MIT manages to have something for just about every major contemporary subculture or hipster subset I can think of. Nerds and tinkerers? Check. Wooden case for the...
View ArticleA Simple FM Stereo Transmitter using ATTINY12 microcontroller
The parts to the right of the green capacitor are the FM radio transmitter. The parts between the 8 pin DIP and the transmitter are the resistor matrix. One capacitor, C5, is mounted on the back of the...
View ArticleA Low Power PLL FM Transmitter using LMX1601 and ATtiny2313 microcontroller
An LMX1601 Phase locked loop, a discreet FET VCO, and an AVR micro controller combine to make a stable, easy to use monophonic FM transmitter that includes a an audio activated switch that turns the...
View ArticleMinimum Mass Wireless Coupler Terminal Interface using ATtiny2313...
This is a Minimum Mass Wireless Coupler that connects a terminal, or PC running terminal software, to other Minimum Masss Wireless devices by means of a 1200 baud data channel at 181.818 kHz. The basic...
View ArticleMinimum Mass Wireless Coupled Scanning Voltmeter using ATmega8 microcontroller
A 10 bit scanning voltmeter with a Minimum Mass Wireless Coupler, based on the ATMega8.Range to the Minimum Mass Base Unit is 10 to 15 cm. If the voltmeter is battery operated, it can be floated from...
View ArticleMinimum Mass Wireless Coupled Frequency Meter using ATmega8 microcontroller
A 0 to 2 MHz ferquency meter with a Minimum Mass Wireless Coupler, based on the ATMega8.Range to the Minimum Mass Base Unit is 10 to 15 cm. Since the frequency meter is battery operated, it can be...
View ArticleMinimum Mass Wireless LCD Display using ATtiny2313 microcontroller
A 2 line X 16 character LCD display that is battery operated and works without an external connection. The basic MinThe basic Minimum Mass Wireless Coupler technology is described and links to other...
View Article3 channel, 8 bit EEPROM DAC with DS interface using ATtiny12 microcontroller
•Low power •EEPROM memory for autonomous operation, 16 bytes available for general purpose use. •Low cost This device provides three channels of 8 bit pulse-width modulation. Output pulse duty cycle...
View ArticleLED Matrix Display using TD62783 microcontroller
Last Sunday I gave a workshop in TOG as part of it’s Engineers Week 2011 activities. We spent the day assembling a 8×8 Red/Green LED Matrix Display circuit which I designed in strip board. The circuit...
View ArticleATtiny12 fuse restorer using microcontroller
This restores the fuses in an ATtiny12 via High Voltage Serial Programming. Plug an ATtiny12 into the 8 pin socket and hold down “GO!” button. The LED will come on at the end of the programming...
View ArticleHow to drive 595 shift registers with AVR hardware SPI using ATmega168...
Driving a shift register using an AVR chip’s built-in hardware is really quite easy. Most of their offerings have an SPI module, or Serial Peripheral Interface. A shift register is exactly that, a...
View ArticleMP3 Player using ATMega128 microcontroller
History I decided to do this project for several reasons: first I like music, second I have a huge collection of MP3, and third I wanted to be able to play them anytime in my living room. I began the...
View ArticleDIY USB password generator using ATtiny Microcontroller
Having done half a dozen V-USB tutorials I decided it’s time to whip up something cool. As USB keyboards were an area untouched, I decided to make a small USB HID keyboard device that types a password...
View ArticleNikon Camera Remote Control using ATtiny13 Microcontroller
This is an IR remote control for Nikon cameras. It is compatible with the Nikon ML-L3 remote control. Supported cameras include: D40, D40X, D50, D60, D70, D70s, D80, Coolpix 8400 8800. This design is...
View ArticleDoor Chime Privacy Sentry using Attiny12
An ATtiny12 controller as a timer and some switching circuitry turns the doorbell off for 10 hours at the same time each day. The string of resistors across the top of the board are series connected to...
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