Replacement for the analogue clock in a P38 range rover (1994 - 2002). Comes in 3 parts; the main casing, and interior panel that holds the LCD in place and a lid that goes on the back. If you want to use a light sensor to control the brightness of the lcd, push the legs of it through the holes in the interior panel before fitting it.

The one I built uses a nodemcu board: https://www.amazon.co.uk/MakerHawk-ESP8266-NodeMcu-Wireless-Development/dp/B0728D7T3M/

This 12v USB converter: https://www.ebay.co.uk/itm/DC-6-24V-12V-24V-to-5V-3A-Car-Dual-USB-Charger-Module-Buck-Step-Down-Converter/183582175132

An RTC chip like this one: https://www.amazon.co.uk/gp/product/B01F6MJZGQ

And this LCD display: https://www.amazon.co.uk/gp/product/B0785SRXDG/

You can find the arduino code for this here: https://github.com/Tall-Paul/p38clock/blob/master/P38_LCD_Clock.ino