Circuit Lake » Electronic

Reverse Engineering with Photoshop

admin — Wed, 26 Nov 2008 22:17:41 +0000

If you want to learn Reverse Engineering you can use photoshop as aid tools. For example, This 12-keys keypad failed after years of daily use. No schematic or replacement parts from the original manufacturer. The only option was to replace it with an off-the-shelf telephone-style keyboard.Following the maze of each and every PCB track [...]

Class A Mosfet Headphone Amplifier

admin — Mon, 24 Nov 2008 11:16:38 +0000

This is a simple and low cost desktop headphone amplifier for the office. The amplifier concept is simple and follows a typical single-ended class A circuit utilizing an active constant current source (CCS) in place of a passive resistor. A CCS doubles the efficiency of the circuit over that where a passive load resistor [...]

Universal Lithium Ion Battery Charger

admin — Wed, 24 Sep 2008 03:28:32 +0000

It is a universal lithium ion battery with a battery charger intelligent interface based on a microcontroller Atmel ATmega8 using GCC worm. 3.2. The rate settings are established using one of three methods: a Smart car if the battery is detected, the battery settings are used. If the "Custom" is selected then the settings are [...]

AVR Project : Digital Voltmeter

admin — Mon, 04 Aug 2008 01:06:10 +0000

This is a mini inexpensive AVR Digital Voltmeter Project with three digit display. It has also general purpose digital IO pins. So, you could use it as well to read a digital sensor and display the value. The project can be freely programmed, calibrated and even be programmed with a non linear formula. It’s a display [...]

USB Audio Digital to Analog Converter

admin — Wed, 02 Jul 2008 01:16:27 +0000

I want to build high quality preamplifier with built-in DAC from SPDIF or USB for my power amplifier Leachamp. I tried to design DAC from USB with this circuit on one-sided PCB and I was successful. Schematics is from datasheet of PCM2902. Circuit includes DAC and ADC, SPDIF output and input and HID part with 3 [...]

Simple Metronome Project

admin — Fri, 02 May 2008 22:38:00 +0000

Daniel designs this Metronome with a few simple electronic components.The Metronome is any device that produces a regulated audible and/or visual pulse, usually used to establish a steady beat, or tempo, measured in beats-per-minute (BPM) for the performance of musical compositions. It is an invaluable practice tool for musicians that goes back hundreds of years. Material [...]

Firefly simulator on microcontroller avr

admin — Wed, 10 Oct 2007 22:30:00 +0000

by Saranjit Kaur and Michelle Mellers The goal of this project was to build a LED-based device running on a microcontroller chip to mimic how fireflies might theoretically synchronize their flashing in nature. The device serves as a future model on how to implement a physical form of networking using a microcontroller chip. To implement these goals, [...]