- All right, so now we're getting somewhere,
but this is not exactly a practical solution
and that's to remain tethered to a PC
and manually controlled.
The first step towards a completely self-contained solution
is to attach a standalone input device,
which I've done here by crudely soldering on
a 128-by-32 pixel OLED screen with three input buttons.
The really nice thing about using
an ultra low power platform like Arduino
is that this device, even with a display attached,
has a peak current draw of about 20 milliamps
as you can see here.
So this tiny 500-milliamp power lithium polymer battery
should last well over 24 hours on a single charge.
If I connect this up, we now have something resembling
a practical self-contained device.
Here's the same device
just with a little electrical tape added
to hold everything together.