Circuit Lake

LCFesR meter is a precise, wide range meter that can measure inductivity (L), capacity (C), frequency (F) and equivalent series resistance of a capacitor in-circuit (ESR) based on AVR ATMega88PA-PU microcontroller. It can be easily built with homemade one or double-faced PCB and available electronic components.
dr. Le Hung, project designer, explained that measurement of ESR [...]

AvrPhone is ATmega128A-based simple mobile phone with touch screen and SIM100S GSM module. The display uses 2,4″ LCD with a resistive touch screen and ILI9325B driver (16 bit parallel bus).
The LCD breakout board contains SD card slot and XPT2046 touchscreen controller. They both are connected to AVR’s SPI bus. The project is powered by [...]

This simple counter is built based on PIC16F84A and SAB6456 IC. The SAB6456 is a prescaler for UHF/VHF tuners. It can be switched to divide-by-64 or divide-by-256 by the mode-control (MC) pin. The circuit has an input frequency range of 70 MHz to 1 GHz, has high input sensitivity and good harmonic suppression.
This project is [...]

The goal of this project was to design and build a ‘gaming’ device capable of levitating a ping pong ball at varying heights based on the proximity of the user to the device. The project based on ATMega16 microcontroller.
The project incorporates a fairly complex mechanical system and utilizes many features of the ATmega platform including [...]