Difference between revisions of "Cheap ULN2803A Motor Driver"
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| − | + | :Normally, a PIC or other chip can't output enough current and/or voltage to drive a DC motor, and if the DC motor you need to control requires 500ma current or less at more than 5vdc, here's a cheap way to drive it. A typical, small hobby motor that needs 3.3vdc, 5vdc or even 12vdc is an example. To start, here's an outline of connections to the ULN2803A: | |
| − | [[File:Cheap motor driver.png | | + | [[File:Cheap motor driver.png | 350px|center]] |
| − | And here's how you'd connect your controller to it: | + | :And here's how you'd connect your controller to it: |
[[File:Cheap motor driver example.png | 500px|center]] | [[File:Cheap motor driver example.png | 500px|center]] | ||
| + | |||
| + | :'''Additional information:''' | ||
| + | |||
| + | ::* Any controller that outputs a positive control signal should work, such as the Ren48LSD. | ||
| + | ::* The ULN2803A could conceivably control up to 8 motors, depending on their current draw (total < 500ma) | ||
| + | ::* The motor speed can also be controlled further by using common PWM operation in the PIC firmware | ||
| + | ::* The ULN2803A has a maximum voltage rating of 50vdc. | ||
Revision as of 12:23, 17 August 2017
- Normally, a PIC or other chip can't output enough current and/or voltage to drive a DC motor, and if the DC motor you need to control requires 500ma current or less at more than 5vdc, here's a cheap way to drive it. A typical, small hobby motor that needs 3.3vdc, 5vdc or even 12vdc is an example. To start, here's an outline of connections to the ULN2803A:
- And here's how you'd connect your controller to it:
- Additional information:
- Any controller that outputs a positive control signal should work, such as the Ren48LSD.
- The ULN2803A could conceivably control up to 8 motors, depending on their current draw (total < 500ma)
- The motor speed can also be controlled further by using common PWM operation in the PIC firmware
- The ULN2803A has a maximum voltage rating of 50vdc.