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 make a 728 Ohm 2 watt resistor. The slide switch is used to switch the circuit between the …
Both Mainboard Features Pin compatible for 40-pin AVR and AT89S5x family Microcontrollers Single sided PCB, header for 4 I/O ports, ISP port and RS-232 port Built in +5V voltage regulator LM7805 with heatsink Built in +5V and +12V (depend on input voltage) with terminal screw connector for further expansion Onboard In System Programmer header Schematic …
ATMEL AVR ATMega 8535/16/32 and ATMEL AT89S5x Family Learning Kit Read More »
Introduction Our project consists of making a reflow soldering device using a normal toaster oven with a graphical LCD display for control and GUI. Soldering is an important and difficult task for custom printed circuit board design especially for integrated circuits that come as chip packages that are impossible to solder by hand. This is …
The Reflow Soldering Oven with LCD Display using ATmega32 Read More »
I. Introduction The Cornell University Airmouse Initiative is a motion sensing glove with buttons on it that plugs into your computer to function as a mouse. Many tasks that are performed on the computer require the use of both a keyboard on the mouse, and many people find it frustrating and awkward to have to …
This new version has internal Ni-MH battery backup, reset button and simple time setting. Now the circuit board was embedded with lamp fixture. Preset turn on period is from 18:00 to 22:00 everyday. You may let the saver turn on whenever you want. The period of time on can be reprogrammed with sdcc. Howvere this …
Night Light Saver V6 using AT89C2051 Using Atmega Read More »
If you’ve ever wanted to power your Arduino or AVR from a battery for development testing (batteries have different power delivery qualities than, say, transformed AC or even a regulated wall wart in DC) testing but were tired of going through batteries (Hey, I admit I’ve sucked batteries dry in hours because of a slipped-up design before …
Power your Arduino/AVR with a Hand-Cranked Battery Using Atmega Read More »
The Arduino — and AVRs in general — have a wide range of power supply options ranging from around 1.8V to 5.5V. The choice of voltage is usually determined by the desired clock speed or power consumption requirements. The Arduino and its many variants have power jacks that allow connections from big, clunky “wall warts.” …
Power Your Arduino From Your Car using AVR microcontroller Using Atmega Read More »
If you’ve ever wanted to power your Arduino or AVR from a battery for development testing (batteries have different power delivery qualities than, say, transformed AC or even a regulated wall wart in DC) testing but were tired of going through batteries (Hey, I admit I’ve sucked batteries dry in hours because of a slipped-up …
Power your Arduino/AVR with a Hand-Cranked Battery using ATmega8 microcontroller Read More »
Do you have a pile of AA rechargeable batteries in your drawer? Some are old, some are new, but which sets would you bring with your camera on your next trip, and which ones are past their useful life? I like using rechargeable batteries, but I’m certain that some of them are not living up to …
Rechargeable Battery Capacity Tester using ATMega168 microcontroller Read More »
AVR SED1520 Library This is a C-library for avr-gcc/avr-libc to access SED1520-based graphics-LCDs. The modules used to develop the library only support “write to LCD”, read-modify- write on the display RAM is not possible. So this Library uses a “frame buffer” which holds the display-content in the AVR’s SRAM. For a 122*32 pixel display around 500 …
Interfacing Atmel AVR with Graphics Liquid Crystal Displays (GLCDs) Read More »
