Introduction: 555 DC Motor Speed Control
This is a pretty cool circuit that allows you to control the speed a DC motor of considerable size! This circuit was made as part of the Jameco and Instructables Hacknight Hosted by H3 Laboratories in El Paso Texas
Jameco sent us a grab bag of awesome components that we put into use right away!
Bill of Materials:
1 - 555 Timer IC (from Jameco)
2 - Small Glass Rectifier Diodes
1 - High Current Rectifier Diode (Jameco)
1 - 1MΩ Potentiometer (From Jameco)
1 - (Green, Red, Brown) Resistor
1 - 1KΩ (Brown, Black, Red) Resistor
1 - Power MOSFET
2 - .01 µF Ceramic Capacitors
1 - DC Motor
Step 1: Install Jumper Cables
We will be needing a lot of jumper cables. I tend to install them first and later put in the components but you can do it any way you want just follow the schematic. If you want, you can follow my way.
Install the 555 IC on the breadboard.
Step 2: More Jumpers
Install the other jumper that will be going to the potentiometer.
Step 3: Jumpers
More jumpers connecting pins 4 and 8 and 2 and 6
Step 4: Install the Two Capacitors .01µF and Diodes
Follow the picture
Step 5: Install the Remaining Components As Shown in the Picture
The circuit is finished follow the schematic for more clarification on the position of components.
Step 6: Video
This circuit was made as part of the Jameco and Instructables Hacknight Hosted by H3 Laboratories in El Paso Texas
1 Person Made This Project!
- wjsyenko made it!
19 Comments
5 years ago
thanks for sharing your project.
on which website can i find your type of breadboard?
5 years ago
good
6 years ago
Value of the potentiometer on the parts list is 1MΩ (=1000kΩ). Value of potentiometer in the schematic is 100kΩ. Will they both work?
Thanks,
biohm
T
7 years ago
Systematic diagram please...thanks
7 years ago on Introduction
what is the useful of the capacitor parallel with irf520 and 2 parallel diodes on left ?
7 years ago on Introduction
The capacitors on the schematic are totally different than in the circuit/parts list?
7 years ago
Impressive work.
8 years ago on Introduction
8 years ago on Introduction
Hi
How much voltage that 470 uF capacitor includes?
8 years ago on Introduction
hey !!! what is that thing its looks like electrolytic caps if it what is the volt. and.... the farad of the caps ? pls pm i want to try
8 years ago on Introduction
from where is the input done??
9 years ago
The schematic is correct. Pin 7 is equivalent to pin 3 but it does not go high. The circuit uses the gate of the MOSFET through pin 7, you can try it. It works
9 years ago on Step 5
you need to correct the schematic. need to swap pin #'s for pin 3 and 7.
9 years ago on Introduction
At the present I have no plans to use this circuit, but I appreciate what you have done. It is very practical.
9 years ago on Introduction
Great project!
The 555 works like a PWM emitter doesn't it? With frequency adjusted by the potenciometer right?
I don't know the difference between a MOSFET and a Transistor. What is it?
Thanks in advance!
9 years ago
That depends on the MOSFET you are using, this one is the IRF640 can handle 18A @ 10V in 25°C you can use different MOSFETs and power supplies and the possibilities are even higher.
9 years ago on Introduction
How many amps can this circuit handle?
9 years ago on Introduction
Yes, they are correct:
(Pins 7 and 3 are "in phase.") Pin 7 is equal to pin 3 but pin 7 does not go high - it goes OPEN. But it goes LOW and will sink about 200mA.
http://www.555-timer-circuits.com/pin-configuration.html
9 years ago on Step 5
Hi,
Are 3 and 7 from the 555 correct? Output = 3 an Discharge is 7.
Den