Could anyone explain to me what it takes to control a strong DC motor with e.g. an AVR?
For example if I have a 24V Motor with 5A or more. How can I build such a circuit? Especially if I want to change the direction that the motor is running (H bridge).
Best Answer
You answered your own question; you'll need an H-Bridge. Here's a DigiKey listing of H-bridges that are rated for at least 5A, and for supply voltages at least to 24V, sorted by price ascending. The Infineon BTM7700G in that list is relatively inexpensive and exceeds your requirements by a healthy safety margin -- and, since it's a 1.27mm pitch SO package, it's extremely easy to solder.