After noticing a dual relay board on Amazon that would work with an Arduino microcontroller, I came up
with the idea of having an RTC (real time
clock) connected to an Arduino that would
activate a relay that turns off the AC power to
the router for a brief period of time.
After a little work on scratch paper, I
came up with the circuit shown in Figure 1.
The LCD display was added as an
afterthought when I discovered it would fit
with everything else in the 158 mm x 90 mm
x 60 mm (roughly 6 x 3-1/2 x 2 -/8 inch)
plastic box which I had available.
I chose an Arduino Nano — perhaps my
favorite model — as it has most of the features
of the Uno but in a smaller package. In
August 2016 31
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■ FIGURE 1. The router
■ FIGURE 2. The LCD display mounted in the cover of the box.