LCD Serial Terminal

Posted on Mar 18, 2013

This project is a self-contained serial terminal using a PIC16F84 microcontroller chip, an inexpensive LCD character display, a keypad, and very little else. It is full-duplex, meaning keypresses cause RS-232 output, and RS-232 input makes characters appear on the LCD. If you connect the RS-232 output to the input you can see the keys as you press them, without connecting to anything else (thats called looping back).

LCD Serial Terminal
Click here to download the full size of the above Circuit.

The picture above doesnt show the electronics, just a keypad and LCD display. The electronics is on a small board behind the LCD. This LCD is a 4 line by 20 character intelligent LCD display. Displays from 1x8 to 4x20 or 2x40 and pretty much anyth

Leave Comment

characters left:

New Circuits



Popular Circuits

Infrared relay remote control
Razor-sharp CW filter
Low Power LED Battery Voltmeter
Phase shift oscillator circuit
Electrical Live Wire Detector
Backup Lamp
12 Volt fluorescent lamp drivers
Linearized platinum resistance thermometer
Dynamic expansion circuit improved