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Arduino AD9850 Rotary Encoder Commands

ky040As described earlier, my signal generator is controlled by LCD Keypad buttons and a rotary encoder. The KY-040 rotary encoder is cheap and reliable. You can buy them on eBay for around a dollar each and you should always keep a few around.

Rotary encoders are used to send tuning pulses to an electronic device. Your car radio probably uses rotary encoders for changing volume and frequency. They work by sending pulses when turned. These pulses are on two channels (A and B) and are sent 90 degrees out of phase with each other.

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