You can test your power sources with constant current!

Smart and safe power switch with protection (over temperature, over current etc. See datasheet of BTS117).

General

This is a dummy load. This device developed to test your power sources, battery, supply circuit, power bank etc. You can set constant current level with built-in potentiometer or analog input voltage. You can read actual current value with multimeter or Arduino like development board. Only read analog voltage and convert to current with our examples on github.

You can directly access Arduino examples on SLB github page. No wait to test!

We facilitate everything for you to focus on your business!

Features and Specifications

• The best price/performance!
• Up to 3 A constant current.*
• BTS117 smart power switch used. It has lots of protection.
• Easy to use. You can use it as soon as you get the product.
• Robust and stable.
• Arduino or other development boards friendly! You can use it together, more powerful. Examples available on github.
• Smallest area for dummy loads. Only one square inch PCB!
• All options will be sent assembled.

*See Extended Features for Veterans

Jumper Details

• JP1
• 1connect2: Supply with 5V (default)

• 2connect3: Supply with up than 6V to 20V

• JP2

• 1connect2: Potentiometer control (default)
• 2connect3: External analog signal control

Applications

• You can use SLB for dummy load. You can directly test your power sources(battery, usb charger, solar panel, hydrogen fuel cells etc.).
• Beside you can use SLB to flow constant current on LED, dc motor, coil etc.

Quick Start

Potentiometer control Arduino read

• Download simple read current example from github and upload your board.
• Connect power pins (VCC(5V), GND from Arduino) and signal pin (Current) to Arduino (A0)
• Set potentiometer to zero current (clockwise)
• Connect your load
• Turn potentiometer and see the increase! This is it! You can test your load!

Current calculation algorithm

You can get current calculation algorithm from github gist page.

Product Options

Heatsink

Both of them aluminium passive heatsink.

• 8.5 Watt. 2.9cm x 3.0cm x 1.1cm
• 15 Watt. 5cm x 2cm x 2.15cm/3.8cm
• 24 Watt. 7cm x 7.8cm x 2cm

Extended Features for Veterans

• SLB is a hackable dummy load. You can edit components for wanted ratings. We prepared some utility tool for you!
• In this sheet helps you to hack! To change current ratings you need to change Rsense, Ri, Rf and MOSFET. You need to set maximum current level to 3V.
• You can freely edit this device for more or less power ratings. About dummy load you can do whatever you want!
• Current reading start from 100mA.

Never delay for this experience. This dummy load saves your or/and team development process!