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Reference Designs

Learn how to use EAGLE from a variety of example projects.

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mb1014_rev.1.10.sch by admin

Car Battery monitor with LM3914 and HP HDSP4832 led bar graph\r\nUploaded by Gianni De Angelis from Private

9813 Downloads | 389 Likes | 08.12.2011

amp-tda2003-single.zip by admin

A small 10W Single Channel audio amplifier using TDA2003 IC. Including volume control. 12V PSU is Ideal. Heatsink required for IC. By defualt, the design only displays the bare circuit in \"board view\", so just enable the necessary layers for component values and pinouts.\r\nUploaded by Bradlin Basson from South Africa

11798 Downloads | 402 Likes | 07.09.2010

usb-serial_converter.rar by m3cortex

USB to Serial Port converter

9039 Downloads | 543 Likes | 01.12.2015

pulsweite-lm324-tle5205.zip by Guenter

Pulsweitenmodulation zum Steuern von DC-Motoren bis 5A bei einer Spannung von 6-30VDC. Die Steuerung erfolgt über ein Potentiometer, wobei in der Mittelstellung kein Signal ausgegeben wird oder je nach Jumperstellung die Brücke einseitig kurzgeschlossen wird. Durch verdrehen des Potentimeters wird die Pulsweite in beide Richtungen entsprechend der Einstellung ausgegeben. Auf ausreichende Kühlung der H-Brücke ist zu achten. Ein Bildsymbobol für das Potentiometer liegt als PDF bei.

5617 Downloads | 427 Likes | 04.30.2013

mega-prog-board.zip by Helmut

Kleines Programmierboard für Mega8, 88, 168 und 32

6041 Downloads | 431 Likes | 10.27.2013

humidity_control_gadget.brd by DINO

THIS IS A HUMIDITY CONTROLL GADGET. THE PARTS CAN EASILY BE FINDED , IT IS A VERY LOW COST GADGET, IT CAN BE USED IN ROOM COOLERS TO KEEP THE ROOM HUMIDITY FREE DURING RAINY SEASON. IT IS A MULTI PURPOUSE GADGET AND CAN BE USED IN INDIAN DESERT COOLERS, EASY TO ASSEMBLE. IT\'S MAIN FUNCTION IS TO CONTROLL THE COOLER PUMP BY KEEPING IT ON FOR LIMITED TIME AND THEN THE DEVICE AUTOMATICALLY SWITCH IT OFF ACCORDING TO SETTED TIME THROUGH A VARIABLE RESISTOR. MAIN FEATURES ARE- 1) IT SAVE ELECTRICTY 2) IT SAVE WATER 3) PREVENT COOLER FROM CORROSION 4) ENSURE LONG LIFE OF COOLER PUMP 5) KEEPS ROOM COOL AT LOW COST 6) EASY TO USE/ASSEMBLE

4926 Downloads | 436 Likes | 04.26.2012

mini_bench_psu.zip by admin

A variable mini test bench power supply unit (PSU) for voltages : 0-14V and Current : 0-800mA. As well as offering constant V or I option. Circuit dimensions : 64mm x 95mm\r\nUploaded by Bradlin Basson from South Africa

14821 Downloads | 387 Likes | 07.08.2010

laser.zip by admin

A small power modulator for suply LASER diode for long live function.\r\nUploaded by Bratu Florian from GACW

21252 Downloads | 403 Likes | 03.05.2007

speaker_protection.rar by admin

Audio Power Amp. pop & click free speaker protection circuit (eliminates noise during turn-on and turn-off).\r\nUploaded by Arpad Attila Bakos from HUNGARY

20841 Downloads | 405 Likes | 10.18.2006

rl5554017.brd by ChethanMurthyHS

This circuit uses the 555 timer in an Astable operating mode which generates a continuous output via Pin 3 in the form of a square wave. This turns the LED (D1) on and off. The speed at which the LED (D1) is turned on and off is set by the values of R1 and R2.

4931 Downloads | 568 Likes | 10.22.2014