Schematics > PC related > LCD2LPT with LIRC
LCD2LPT with LIRC The "LCD2LPT with Lirc"
circuit is the compilation of two circuits found on the net
on a single board. The first is LCD to LPT
interface and the second an IR remote control interface using
http://www.lirc.org/
program.
The main circuit for LCD connection to LPT
was modified adding a backlight
and contrast
control using 4 push buttons. Responsible for the adjustment
are the two DS1809 ICs made from Dallas-Maxim
semiconductors along with 2 buttons for each adjustment.
IC1 with the use of S1(+,
Up) and S2(-, Down)
controls the Contrast of LCD
and IC2 with the use of S3(+,
Up) and S4(- , Down)
and the help of transistor T1,
controls the backlight intensity.
IC3 is a 7805 regulator that stabilize
the power line of the circuit. There is also a filtering
capacitor that helps the transient discharge of the circuit preventing any damages
to the ICs.
To JP2 you must apply 12V
and if you wish you can add a polarity protection diode
(1N4007).
For the IR receiver you must read the
site http://www.lirc.org/.
The only thing i have to add up is to remove pin3
during contraction and read the receiver's IC datasheet to help
you out connecting it right.
An adaptor for the LCD is also included so you can use a ribbon
cable for the connection with the main circuit.
Download this project in .doc
Download PCB in pdf format
Download
schematic, layout in pdf format
Title: LCD2LPT with LIRC
Source: www.electronics-lab.com
Published on: 2005-02-03
Reads: 243
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