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

Parts:

Arduino + ST7920

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

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

1. Download and install HardwareSerialMonitor

   https://cdn.hackaday.io/files/19018813666112/Hardw...

2. Start it with administrator rights
3. Choose correct serial port