The hardware he’s using is pretty standard for an electronic hobby clock; an ATmega16, graphic LCD, DS1307 real-time clock, and supporting hardware like a potentiometer, resistors, and buttons.

Once they have drawn the clock face, ask them to put all the numbers in, and ask them to draw the hands onto the clock at a specific time - for example at 3.15pm.

Once they have drawn the clock face, ask them to put all the numbers in, and ask them to draw the hands onto the clock at a specific time - for example at 3.15pm.

This test assesses a person's ability to draw a clock accurately, including the circle, numbers, and hands indicating a specific time. (Image: Canva) Dementia is a neurodegenerative disease that ...

I watched my mother draw a clock while she was in a brain rehabilitation centre after her stroke. Until then, I did not know how common a test it was, how often it was used – or why.