We’ve created a lot of circuits together and now it’s time to start looking at a new part, the 4046 is a Phased-Locked Loop IC that contains both analog and digital circuitry inside. Well be using the 4046 to help generate the siren sound for this circuit. We’ll also be using the 555 timer and all the potentiometers in the kit. So let’s get started and build us a siren!
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