CH341 USB TO I2C/SPI/EPP
USB to I2C OLED
USB to LCD
USB Input Output
SD CARD
SD FAT32 Player PIC12F1822
W25Q64 Flash Recorder
Picture Frame PIC16F690
Color OLED Picture Frame
SD FAT32 TFT Display
Doorbell with SD/EEPROM
SD Talking Clock
SD Sound Recorder
SD FAT32 wav Player
SD Arduino Recorder
Arduino Picture Frame
FREQUENCY COUNTER
Chrome Browser Counter
Arduino LED MAX7219 Counter
LCD Accurate Counter
OLED Accurate Counter
MilliHertz Counter
PIC Counter For Android
MAX7219 LED Counter
WiFi Frequency Counter
Frequency Generator
OLED Counter PIC12F629
Talking Frequency Counter
TFT Counter PIC16F628A
SSD1306 Counter PIC16F628A
SSD1331 Counter PIC16F628A
Arduino Counter for PC
OLED Arduino Counter
OLED Frequency Counter
TFT 10MHz Counter
PC Counter
LED Counter
Scope Screen Counter
LCD 16 x 2 Counter
LCD Arduino Counter
6MHz Android Counter
NIXIE Android Counter
Bluetooth Counters
USB Counter
OBD2
OBD2 Engine Rev Counter
OBD2 Diagnostic app
OSCILLOSCOPE
Logic Analyzer
PIC12F1822 Scope for PC
Arduino Oscilloscope for PC
Arduino OLED Oscilloscope
Android Oscilloscope
TFT Oscilloscope
USB Oscilloscope
THERMOMETER
Thermocouple 1023 Deg
Thermometer For Browser
OLED Thermometer PIC12F629
OLED Room Thermostat
TFT Clock and Thermometer
LED Thermometer
USB Thermometer
Serial Thermometer
Serial Thermostat
USB DS18B20 Sensor
TIMER / CLOCK
Real Time Clock DS3231
LED TM1637 Timer
OLED Timer Thermometer
TFT Timer Thermometer
LED Timer
LCD Timer
Clock Thermometer
Talking Clock PIC16F628A
Android Talking Clock
WiFi
WiFi, Ethernet
WiFi Thermometer
WiFi ESP8266
USB
IO for Chrome Browser
USB 16x2 LCD
USB TFT display BMP
USB Meter
USB Input-Output
USB Input-Output Android
DATA ACQUISITION
Analogue to USB (CH341)
MCP3201 on Serial Port
PC Analog Input (USB-UART)
SERIAL PORT
Serial TFT Text
Serial Inputs Outputs
Serial Port LCD
Analogue Signal to Serial
OTHERS
HC-SR04 Sensor
OLED Amp Meter
PC digital I/O (no coding)
Analogue Signal to LPT
LCD Display on LPT
Water Softener
3.7V to 5V
Solar Charger
PIC Music
Code Lock
SMALL PROJECTS  
  Technical Tips  

SERIAL PORT DRIVING LCD

The serial port drives and powers an LCD module of 16X2 characters. Included a VB6 software, PIC C code and a circuit diagram. The VB application transmit only the last input byte to avoid overflow of the receive register of the PIC16F628A.
The serial port can source about 4 mA which is enough to drive the pic and the LCD module. The serial port can't power LCD with LED back light.
You can read more about serial interface in http://www.beyondlogic.org/spp/serial.htm
VB6 code, PIC code and circuit diagram download (20KB). You are free to use the circuit diagram and the VB software with no limitations.

 

Circuit Description
See also Technical Tips

Pin 4 at the serial port is turned to +12V by the software enabling RTS.
It is regulated to 5V by 78L05. The 5V is the supply to the microcontroller.

Pin 3 is used to drive RX input, BC337 reverse the signal phase.

LCD display and driver has 14 way connector, 10 connections are used, 4 bits data bus is selected.
There is a big selection of LCD modules, and they are very similar in characteristics i.e. DM1601, ACM1601.
Vss - Supply GRD.
Vdd - Supply 5V
Vo - Contrast Adjust
RS - Register Select
R/W - Data Read/Write
E - Enable
D4-D7 - Data Bus Lines
LCD module is 20K pot is the LCD contrast, make sure it is set.



Name:

Comments and questions

Copy the number from the picture It stops net-robots from adding comments.



11.05.2015 - 15:43
Name: Moty
Comment: Click button Download Software.

11.05.2015 - 15:01
Name: N
Comment: |All right, but where is the program or hex file for pic ????

21.11.2014 - 06:51
Name: ekraj
Comment: sir, I need voltage and current monitoring program using vb 6 and avr atmega32 plz help me

20.07.2014 - 13:04
Name: valera
Comment: good

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