PC Hardware Monitor With Arduino and ST7920 LCD

There are 2 versions of the project:

4 numeric fieds and 1 graph for CPU load or clock
4 independent graphs for CPU temperature, load, clock and used RAM

Parts:

Arduino Nano or Arduino Pro Mini with USB to serial adapter
ST7920 128x64 LCD

Supplies

Parts:

Arduino + ST7920

Step 1: Connections

There are only 6 wires necessary to connect Arduino and ST7920 LCD in SPI mode.

Full list of connections from LCD side:

#01 GND to GND
#02 VCC to VCC (5V)
#04 RS to D10/CS or any pin
#05 R/W to D11/MOSI
#06 E to D13/SCK
#15 PSB to GND (for SPI mode)
#19 BLA to VCC, D9 or any pin via 300ohm resistor
#20 BLK to GND

To avoid extra GND lines solder 2 wires directly on LCD PCB: GND to PSB to BLK

Step 2: Arduino Firmware

Arduino sketches for both versions of the project:

https://github.com/cbm80amiga/ST7920_HWMonitor

https://github.com/cbm80amiga/ST7920_HWMonitorGrap...

Required libraries:

https://github.com/cbm80amiga/ST7920_SPI

https://github.com/cbm80amiga/PropFonts

Step 3: PC Software

Download and install HardwareSerialMonitor
https://cdn.hackaday.io/files/19018813666112/Hardw...
Start it with administrator rights
Choose correct serial port

Step 4: Demo Video:

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5 Comments

TedV2

2 months ago

HardwareSerialMonitor_v1.1
https://cdn.hackaday.io/files/19018813666112/HardwareSerialMonitor_v1.1.zip
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<RequestId>V9BGNE6JEAYXWY91</RequestId>
<HostId>6QkcSBw+chj+gMTrAP06+Vg+zRTO/Uhu7IimrlRGkT2KygLZaA15hLc7mSkaZEMuME54nL8EueQ=</HostId>
</Error>

pepperellt202

Question 1 year ago

Hi, I was wondering if the hardware monitor with ST7920 is compatible with the arduino uno, as ive constructed it using the uno instead of pro-mini and LCD is shows garbled text and random pixels... is this due to a 328p-pu difference compared to the surface mount atmega used in the mini or should i be looking at something else ?

lexa8527

2 years ago

ссылка на программу не рабочая

dtzavellas

2 years ago on Introduction

Hi, i would like to use Hardware serial monitor with arduino uno and a LCD 1602, just to show me the stats ( i don't need the graphics bars) you have any help instructions?

Introduction: PC Hardware Monitor With Arduino and ST7920 LCD