It allows both polarities to control the motor — however if you do it with just plain old switches or relays, you could short the circuit if you try going in both directions at once!

which is far more complex than running a simple brushed motor. He even gets his motor up to 12,500 rpm with his homebrewed drive circuit. Making your own motors can help you solve some difficult ...

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That one’s a motor – we don’t need that one ... Practise drawing the following series circuits using symbols: A simple circuit with a bulb and battery. A series circuit where the bulb ...

A simple sealing ring seems to be the cause of ... It’s a very compact unit that integrates the motor, transmission and inverter. However, there is a problem with this particular one: it ...