Parts

There are few parts required for LCD88:

• Processor
• LCD display
• Keyboard
• Power source
• Sticks and switches (from old tramsmitter)

My first version of LCD88 have processor, lcd and power source on one custom pcb board, but I’ll focus on ready modules.

Processor

• Project uses Atmega88 (soon will be discontinued), Atmega168 or Atmega328 AVR processor.
• Code supports frequency up to 16MHz (sorry, full 20MHz is not supported right now)
• Supply voltage: 3-5V, it depnds on you.
• Processor should have crystal oscillator
• All pins should be availabe, if you use cpu in DIP packaging, keep in mind that you have only 6 analog inputs instead of 8

Basically, typical Arduino Pro Mini with Atmega328 at 16MHz is best choice for that.

LCD Display

Supported displays:

• Siemens S65 L2F50
  • resolution: 176×132
  • chipset: L2F50
  • power supply: 3.0V
  • logic level: 3.0V
  • backlit: 10.5V
  • pictures:

    

• Siemens S65 LS020
  • resolution: 176×132
  • chipset: LS020
  • power supply: 3.0V
  • logic level: 3.0V
  • backlit: 10.5V
  • pictures:

    

• HY-1.8 SPI (blue)
  • resolution: 160×128
  • chipset: ST7735
  • power supply: 3.3V or 5.0V
  • logic level: 3.3V
  • backlit: 3.5V
  • pictures:

    

• 1.8TFT SPI (red)
  • resolution: 160×128
  • chipset: ST7735
  • power supply: 3.3V or 5.0V
  • logic level: 3.3V
  • backlit: 3.5V
  • pictures:

    

• Arduino GLCD
  • resolution: 160×128
  • chipset: ST7735
  • power supply: 5.0V
  • logic level: 5.0V
  • backlit: 5.0V
  • more here

Connecting processor and display

TODO 🙂

Keyboard

This is only part you should do yourself.

Parts needed:

• 6x tact switch
• 6x 1N4148 diode
• 3x resitor 2.2k (smd 0805 if you want to use my pcb design)
• 4 pins header

Schematic diagram:

PCB:

Eagle files could be found at https://github.com/majekw/lcd88/tree/master/pcb

That’s how it looks like on home-made pcb:

Power source

TODO 🙂