Arduino Project 4: Enhancing your mini robot

You’ll need these: HC-SR04 – Get this ultrasonic sensor from for $2. SG90 Servo Motor – We’ve seen this servo selling for around $4 on ebay. Motor drive shield – You can get this expansion board for $5 online. If you’re new to APC we’ve been spending the last few months of this Masterclass looking at how to use the low-cost Arduino microcontroller in the real world. These little 8-bit controller ...

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