DIY ADJUSTABLE CONSTANT LOAD (CURRENT & POWER)

In this project I will show you how I combined an Arduino Nano, a current sensor, an LCD, a rotary encoder and a couple of other complementary components in order to create an adjustable constant load. It features a constant current and power mode and can handle a maximum of 30V and 20A if your heatsink design can handle it. Let’s get started!

Step 1: Watch the Video!

The video gives you all the information you need to make your own adjustable constant load. During the next steps though, I will present you some additional information.

Step 2: Order the Components!

Here you can find a parts list with example seller:

Amazon.com:

1x Arduino Nano: https://amzn.to/2PzA0ue

1x 16×2 I2C LCD: https://amzn.to/2o9Ms7N

1x Rotary Encoder: https://amzn.to/2wdvDNH

1x TC4420 MOSFET Driver: https://amzn.to/2PCV8Qf

1x IRFZ44N MOSFET: https://amzn.to/2P7NJYp

1x ACS712 Current Sensor: https://amzn.to/2BLBxL5

1x Fuse Holder: https://amzn.to/2BSGtxw

1x 20A Fuse: https://amzn.to/2MRbeax

2x Binding Post: https://amzn.to/2MN8Q4L

Ebay:

1x Arduino Nano: http://rover.ebay.com/rover/1/711-53200-19255-0/1?…

1x 16×2 I2C LCD: http://rover.ebay.com/rover/1/711-53200-19255-0/1?…

1x Rotary Encoder: http://rover.ebay.com/rover/1/711-53200-19255-0/1?…

1x TC4420 MOSFET Driver: http://rover.ebay.com/rover/1/711-53200-19255-0/1?…

1x IRFZ44N MOSFET: http://rover.ebay.com/rover/1/711-53200-19255-0/1?…

1x ACS712 Current Sensor: http://rover.ebay.com/rover/1/711-53200-19255-0/1?…

1x Fuse Holder: http://rover.ebay.com/rover/1/711-53200-19255-0/1?…

1x 20A Fuse: http://rover.ebay.com/rover/1/711-53200-19255-0/1?…

2x Binding Post: http://rover.ebay.com/rover/1/711-53200-19255-0/1?…

Amazon.de:

1x Arduino Nano: https://amzn.to/2BLw2Ml

1x 16×2 I2C LCD: https://amzn.to/2BJ8tnx

1x Rotary Encoder: https://amzn.to/2Lmt5S0

1x TC4420 MOSFET Driver: https://amzn.to/2PBVQ0g

1x IRFZ44N MOSFET: https://amzn.to/2PxQd38

1x ACS712 Current Sensor: https://amzn.to/2NijkGn

1x Fuse Holder: https://amzn.to/2NkffkK

1x 20A Fuse: https://amzn.to/2PCLm0A

2x Binding Post: https://amzn.to/2BP0eGq

Step 3: Create the Circuit!

Here you can find the schematic as well as pictures of my finished circuit. Feel free to use it as a reference for your own circuit.

Step 4: Upload the Code!

Here you can download the code for the project. Upload it to the Arduino Nano through the Arduino IDE

Read more: DIY ADJUSTABLE CONSTANT LOAD (CURRENT & POWER)