DC Motor Control for Robotics and Beyond | Via Simon BDY for @Medium @pollenrobotics #robots
From helping explain the function of H-bridges to the pinouts of bipolar transistors – and more! – check out the links below for some cool articles spotted over at Medium on the topic of DC motor control for robotics – authored by Simon from Pollen Robotics.
One of the main features of these motors is the simplicity of use: if you plug each wire of a battery to the motor’s terminals, it is likely to turn one way. If you switch the wires, it will turn the other way.
(Of course, it’s a little bit more complicated, since the battery must not be too powerful for the motor. If not, the motor may be damaged.)
But this is the problem : it just turns. No speed control. No direction control, unless you manually inverse the wires. At this point your motor is a little bit impertinent. This is painful if you want to build a rover robot for Venus ground (Mars is so 2017)…
Now if we talk about priorities, we would find that direction control comes just before speed control. Why? Basically, because you’d rather have a rover that rolls way too fast with jerky turns, than a rover that moves smoothly in only one direction — and cannot turn. Yes, you get it.
So let’s put aside the speed control for a while, and let’s focus on the direction control.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.