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This instructable describes a project named Duinocade, a mini pong arcade game based on the open source handheld Gamebunio, and which uses Atmega328 as the controller and Nokia 5510 LCD for display screen.
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In this instructable, a 15 year old kid Angelo describes a homebrew USB condenser microphone for recording quality audio at home. His project uses an USB soundcard (DAC), a transistor preamp circuit, and two microphones, all enclosed inside an Altoids tin box. The resulting setup has cardioid pickup pattern, smooth frequency response and 16-bit output, and 44.1/48kHz resolution, which gives you professional audio results under the budget of $10.
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Radek Malina from Czech Republic has designed this development board for rapid prototyping and firmware development with Atmel’s powerful Atmega64 microcontroller. He has also shared his design files here. The development board has the following features: – Atmega64 – all the ports available through pins, a different crystal can be connected (optional frequency crystal) – DS3231 RTC, real-time IC / I2C – Temp. DS1820 1wire Temp. sensor – EEPROM 24AA00SN / I2C EEPROM – USB Port FT232RL USB/RS232 converter – Buttons 8x -16x LED – Connect LCD Display 16×2 – 7segment-LED Display – N-FET For PWM – ISP Programming connector
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Current sensing is a fundamental requirement in many electronics applications. Linear Technology has this application note on collection of current sensing circuits that have been compiled from different other documents.
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From Jim Williams’s application note on Switching Regulators for Poets:
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