a multi-function display for isolde - part 4

The reason I purchased these engine oil pressure and temperature gauge was to get the corresponding sensors. The gauges were so cheap ordered directly from China so I thought the purchase would be a good hedge against my homemade multi-function display project should I decided against it. I would have the option to install these two low cost, yet relatively unobtrusive gauges.

a multi-function display for isolde - part 3

This is the following on post to "a multi-function display for isolde - part 2". I am making some small progress on the programming, and more parts arrived. Among them is the 128x64 pixel OLED display that I was looking forward to play with.

isolde engine coolant warning

Recently I took Isolde out during an early hot day. The ambient temperature was about 88F which is unseasonably hot for May. In my return trip home, the red LED in the coolant gauge began to blink. I thought to myself this is not good. I was crossing a long bridge at the time and I had yet to gather my faculty as what the LED indicator is for. I initially thought it is the engine oil warning light.