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Programmable thermostats can save a lot of energy and money. But you don't have to buy one- you can convert an old mechanical thermostat into a programmable thermostat using an Arduino and a servo.

Learn about a hardware-based approach to performing calculations, routing digital signals, and controlling embedded systems using programmable logic and FPGAs.

In this article, we’ll look at the equation for differential gain and use LTspice to find the value of the channel-length-modulation parameter referred to as lambda (λ).