Featured Member Projects
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Temperature and relative humidity meter using an inexpensive DHT11 sensor
Posted Jan 17, 2012 By RAJENDRA BHATTDHT11 is the most inexpensive sensor currently available in the market that provides calibrated digital outputs for temperature and relative humidity. It is available in a single row 4-pin package and operates from 3.5 to 5.5V power supply. It can measure temperature from 0-50 °C with an accuracy of ±2°C and relative humidity ranging from 20-95% with an accuracy of ±5%, thus making it… -
300 Watt MOSFET Real HI-FI Power Amplifier
Posted Dec 31, 2011 By Circuit ProjectsI am committed to sharing my experience of the RAS 300 with other enthusiasts sharing my passion for perfection.I designed this minimalist amplifier to be durable, simple to operate while offering high fidelity equivalent to the original sound source and would recommend partnering this amplifier only with other products of outstanding quality. When I set out to design this amplifier,… -
PIC Controlled Relay Driver
Posted Dec 31, 2011 By Circuit ProjectsThe components are listed below. 1 x PIC16F84A Microcontroller 1 × 220V/12V 3.6VA (or 3.2VA) PCB Type Transformer (EI 38/13.6) 1 x Line Filter (2×10mH 1:1 Transformer) 4 × 12V Relay (SPDT Type) 4 x BC141 NPN Transistor 5 × 2 Terminal PCB Terminal Block 4 × 1N4007 Diode 1 × 250V Varistor (20mm Diameter) 1 x PCB Fuse Holder 1 × 400mA Fuse 2 × 100nF/630V Unpolarized Capacitor 1 × 220uF/25V… -
10 LED VU Meter Project by LM3915 and LM324
Posted Dec 31, 2011 By Circuit ProjectsInput sensitivity is about 1 Volt rms, up to +6dB. You can adjust the input amplitude by using the multiturn 50k linear potentiometer (POT1). Circuit needs symmetric ±12V power supply because of the LM324 opamp. We used metal film resistors (1% tolerance) so accuracy is sufficiently high. Visual duration can be adjusted by using linear 10k potentiometer (POT2). LEDs should be 5mm x… -
Diffusion limited aggregation
Posted Dec 21, 2011 By Bruce LandFull description at http://people.ece.cornell.edu/land/courses/ece5760/DE2/Stack_cpu.html -
Expandable instrument amplifier from 70W to 300W
Posted Dec 15, 2011 By Leslie PerjesI using stereo bridged TDA7293 amplifier on stage with dual digital effects, and same solution for vocal amplification (with Eminence speakers :). The bridged 2×150W output power is more than enough for guitar, but the same solution for vocal is not the best. This is the reason why I made modular version of my current one-pcb solution. With three simple and small modules, I can build several… -
Digital Energy Meter
Posted Nov 29, 2011 By Samson Jeba KumarElectronic meters measure energy using highly integrated components or other customized integrated circuits. These devices digitize the instantaneous voltage and current via a high-resolution sigma-delta ADC.Computing the product of the voltage and current gives the instantaneous power in watts. Integration over time gives energy used, which is usually measured in kilowatt hours (kWh).The design… -
10 Minute UV Dental Tooth Whitener Timer
Posted Nov 28, 2011 By Mark HarringtonLets get onto the circuit The circuit is all based round the 12f675 and uses timer interrupts a button switch for detecting when the unit has been started to start the timing sequence The Unit must also beep at start up and count to 9 seconds keeping the Luxion led on During the last minute the Module must beep once per second during the final minute countdown so as to notify the nurse…
New Projects by EEWeb Members
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CITROEN Saxo Vehicle Touch Sensitive switches
Posted Feb 06, 2012 By Mark HarringtonThe CITROEN Saxo Vehicle Touch Sensitive switches For operating Hazards and two peripheral devices If you want to change the look of your dash…Comments(0) -
wifi_jammer
Posted Jan 31, 2012 By Hiba Belgholmy project is about wifi-jammer including hardware and software soft like aircrack i would like that every body tries to participate to make this project a good oneComments(0) -
Aquarius Eco Ship
Posted Jan 29, 2012 By Greg AtkinsonThe Aquarius Eco Ship is a concept design project that is studying how ship designs and associated system can be modified to best use wind & solar…Comments(0) -
WCDMA System- Verification of 3GPP specifications and PA considerations
Posted Jan 25, 2012 By Raghuram KamathDesigned and simulated a WCDMA transceiver system in accordance to the 3GPP specifications and constraints. Project considerations included WCDMA transmitter, WCDMA receiver, PA implementation,…Comments(0) -
Ground-Station Satellite receiver design - High Performance 4.1 GHz CMOS LNA
Posted Jan 25, 2012 By Raghuram KamathDesigned and simulated a high frequency CMOS Low Noise Amplifier (LNA) for satellite communication using Cadence SpectreRF for a given set of constraints, namely noise figure, bandwidth, OIP3,…Comments(0) -
PIC and EEPROM Programmer
Posted Jan 20, 2012 By Circuit ProjectsIn this project we are building a JDM programmer that can handle PIC12, PIC16 and PIC18 family microcontrollers and some popular 24C family EEPROMs.Comments(8) -
Voltage Multiplier
Posted Jan 17, 2012 By Dana GillespieIt’s not your standard Voltage Multiplier. It another one of my experiments ~ If a car ignition coil can build 40-60 KVDC when the 12 volts is allowed to fall in on the secondary winding what will it…Comments(1) -
Remote Monitoring System Implementation on Power Transformers
Posted Jan 17, 2012 By Abey FrancisThe aim of the project work is to protect the distribution transformer or any other power transformer, burning due to the overload, over temperature and input high voltage. Normally most of the…Comments(0) -
Relay logic shift register
Posted Jan 14, 2012 By Andrea De NapoliShift register using relay logic and transistors.Comments(0) -
Digital Voice Record and Playback Project by ISD2560P
Posted Jan 14, 2012 By Circuit ProjectsThis project is based on ISD2560P IC which allows you to record 60 seconds voice and then playback it with very high quality.Comments(0)
