Hi
What to buy?
I have a 120watt, 10 amp, 12volt water heating element. But I don't want it to be available to the arduino in an on / off mode only.
I want the element to just be warm, a little. So i need to regulate the voltage digitally.
Please tell me - What can I buy at adafruit to do this ?
Best regards
Dean
arduino voltage regulator - buy what?
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Please be positive and constructive with your questions and comments.
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: arduino voltage regulator - buy what?
You can use one of the PWM pins on the Arduino to drive a power MOSFET like this one: https://www.adafruit.com/search?q=mosfet&b=1
Using the AnalogWrite function, you can control the PWM duty cycle from 0% to 100% with a resolution of 255 steps.
If your heating element is inductive, you will probably need to add a snubber diode to protect the MOSFET from the reverse inductive spike.
Using the AnalogWrite function, you can control the PWM duty cycle from 0% to 100% with a resolution of 255 steps.
If your heating element is inductive, you will probably need to add a snubber diode to protect the MOSFET from the reverse inductive spike.
- Deansmithok
- Posts: 8
- Joined: Wed Mar 18, 2015 8:35 am
Re: arduino voltage regulator - buy what?
Hi
Thank you so much for the gem of help. Saved my many days.
But you have scared me to death on that reverse inductive spike. Please could you post a link to that buy item, and tell me what should be on either side of the diode- like MOSFET gate and arduino.. I'm not so sure :)
Best regards
Dean
Thank you so much for the gem of help. Saved my many days.
But you have scared me to death on that reverse inductive spike. Please could you post a link to that buy item, and tell me what should be on either side of the diode- like MOSFET gate and arduino.. I'm not so sure :)
Best regards
Dean
- adafruit_support_bill
- Posts: 88093
- Joined: Sat Feb 07, 2009 10:11 am
Re: arduino voltage regulator - buy what?
This circuit is for a solenoid, but will work for any inductive load:
And here are some diodes: https://www.adafruit.com/product/755
And here are some diodes: https://www.adafruit.com/product/755
Please be positive and constructive with your questions and comments.