Published July 14, 2016 © GPL3+

Motor On!

How to drive a motor from C.H.I.P. (In this case, controlled by a button and confirmed by an LED.)

IntermediateProtip1 hour3,056

Things used in this project

Hardware components

C.H.I.P.

DC motor (generic)

SparkFun Pushbutton switch 12mm

LED (generic)

Power MOSFET N-Channel

I used an IRF510

General Purpose Transistor NPN

I used an 2N3904

Resistor 4.75k ohm

Breadboard (generic)

Male/Male Jumper Wires

Some wires...

Story

I wanted to control a motor using CHIP. I found out that the CHIP outputs wouldn't drive a power UJ or MOS,

1 / 4

FET transistor directly so I made a two-transistor circuit. I also used a press-momentary switch to control the motor and an LED to show that the motor is on.

I had the transistors already but to buy them (from eBay for example) the power MOSFETs, IRF510 are about $2 for ten and the 2N3904 UJ NPN transistors are 100 for a quid!

The motor can only be switched on and off with this circuit, it cannot be reversed.

Code

MotorOnSw.py

#!/usr/bin/python
#
# Nick Pettefar - 14th July 2016
#
import CHIP_IO.GPIO as GPIO
from time import sleep
#
delay=0.01
Motor = "XIO-P2"
LED = "XIO-P4"
Switch = "XIO-P0"
GPIO.setup(Motor, GPIO.OUT)
GPIO.setup(LED, GPIO.OUT)
GPIO.setup(Switch, GPIO.IN, pull_up_down=GPIO.PUD_UP)
#
GPIO.output(Motor, GPIO.LOW)
GPIO.output(LED, GPIO.LOW)

try:
    while True:
        while GPIO.input(Switch)==1:
            sleep(delay)
        GPIO.output(Motor, GPIO.HIGH)
        GPIO.output(LED, GPIO.HIGH)
        sleep(delay)
        GPIO.output(Motor, GPIO.LOW)
        GPIO.output(LED, GPIO.LOW)

except KeyboardInterrupt:
    GPIO.output(Motor, GPIO.LOW)
    GPIO.output(LED, GPIO.LOW)

Credits

Nick Pettefar

2 projects • 1 follower

Unix biker Radio Ham bad Ukulele player.

Motor On!

Things used in this project

Hardware components

Story

Schematics

The Circuit Diagram

Code

MotorOnSw.py

Credits

Nick Pettefar

Comments

Embed the widget on your own site

Motor On!

Motor On!

Things used in this project

Hardware components

Story

Schematics

The Circuit Diagram

Code

MotorOnSw.py

Credits

Nick Pettefar

Comments

Related channels and tags