Cheap ULN2803A Motor Driver - Revision history

Dirknerkle at 21:05, 10 December 2018

2018-12-10T21:05:25Z

2018-12-10T21:04:14Z

2017-08-22T12:54:22Z

2017-08-22T12:51:35Z

2017-08-17T21:03:20Z

2017-08-17T19:40:50Z

2017-08-17T19:37:56Z

2017-08-17T19:26:39Z

2017-08-17T19:25:35Z

2017-08-17T19:25:00Z

@@ Line 1: / Line 1: @@
-: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, or if it requires more more than 5vdc power, here's a cheap way to drive it. A typical, small hobby motor that needs 3, 5, 7, 9 or 12vdc is an example. To start, here's an outline of connections to the ULN2803A. Note: A ULN2804A is a drop-in, "high-current" version of the ULN2803A.
+: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, or if it requires more more than 5vdc power, here's a cheap way to drive it. A typical, small hobby motor that needs 3, 5, 7, 9 or 12vdc is an example. To start, here's an outline of connections to the ULN2803A:
 [[File:Cheap motor driver.png | 350px|center]]
@@ Line 18: / Line 18: @@
 ::* The motor speed can also be controlled further by using common PWM in the +v control signal.
 ::* The ULN2803A has a maximum voltage rating of 50vdc.

← Older revision		Revision as of 21:04, 10 December 2018
Line 1:		Line 1:
−	: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, or if it requires more more than 5vdc power, here's a cheap way to drive it. A typical, small hobby motor that needs 3, 5, 7, 9 or 12vdc is an example. To start, here's an outline of connections to the ULN2803A:	+	: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, or if it requires more more than 5vdc power, here's a cheap way to drive it. A typical, small hobby motor that needs 3, 5, 7, 9 or 12vdc is an example. To start, here's an outline of connections to the ULN2803A. Note: A ULN2804A is a drop-in, "high-current" version of the ULN2803A.

	[[File:Cheap motor driver.png \| 350px\|center]]		[[File:Cheap motor driver.png \| 350px\|center]]

← Older revision		Revision as of 12:54, 22 August 2017
Line 1:		Line 1:
−	: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, or if it requires more more than 5vdc power, 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:	+	: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, or if it requires more more than 5vdc power, here's a cheap way to drive it. A typical, small hobby motor that needs 3, 5, 7, 9 or 12vdc is an example. To start, here's an outline of connections to the ULN2803A:

	[[File:Cheap motor driver.png \| 350px\|center]]		[[File:Cheap motor driver.png \| 350px\|center]]

@@ Line 13: / Line 13: @@
 :'''Additional information:'''
-::* Any controller that outputs a positive control signal should work, such as the Ren48LSD.
+::* Any controller's PIC that outputs a positive control signal should work.
 ::* The ULN2803A could conceivably control up to 8 motors, depending on their current draw (total < 500ma)
 ::* Multiple inputs and outputs can be chained together for more current capacity. The total dissipation of the ULN2803A chip is slightly more than 2 watts.
 ::* The motor speed can also be controlled further by using common PWM in the +v control signal.
 ::* The ULN2803A has a maximum voltage rating of 50vdc.

@@ Line 16: / Line 16: @@
 ::* The ULN2803A could conceivably control up to 8 motors, depending on their current draw (total < 500ma)
 ::* Multiple inputs and outputs can be chained together for more current capacity. The total dissipation of the ULN2803A chip is slightly more than 2 watts.
-::* The motor speed can also be controlled further by using common PWM operation in the PIC firmware
+::* The motor speed can also be controlled further by using common PWM in the +v control signal.
 ::* The ULN2803A has a maximum voltage rating of 50vdc.

← Older revision		Revision as of 19:37, 17 August 2017
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	[[File:Cheap motor driver example.png \| 500px\|center]]		[[File:Cheap motor driver example.png \| 500px\|center]]
		+
		+	:Here's an example of one compact driver design that was made on an experimenter's breadboard. This includes header pins for connecting Dupont cables, and the short row of 4 pins at the end of the chip are common to each other, making for an easy way to connect multiple grounds.
		+
		+	[[File:Sample driver.JPG \| 350px \| center]]

	:'''Additional information:'''		:'''Additional information:'''

← Older revision		Revision as of 19:26, 17 August 2017
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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:	+	: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, or if it requires more more than 5vdc power, 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 \| 350px\|center]]		[[File:Cheap motor driver.png \| 350px\|center]]

@@ Line 3: / Line 3: @@
 [[File:Cheap motor driver.png | 350px|center]]
-:And here's how you'd connect your computer or controller to it:
+:And here's how you'd connect your computer or controller to it, using input #1 as an example:
 [[File:Cheap motor driver example.png | 500px|center]]