The LED Buddy can help you to design any electronic circuit that includes one or more LEDs. Hold any type of LED to the contact pads of the LED Buddy to start the process. It detects the polarity of the LED, measures the forward voltage and auto-calculates the series resistors that you need to use. The compact size and durable materials ensure that this useful tool is the best buddy any maker can have. No more circuit troubles!
Features:

1. 8 x 2 character LCD
2. auto-calculates the series resistor (E12 series)
3. detects a LED's polarity
4. measures the LED's forward voltage
5. adjustable target current
6. adjustable target voltage
7. contact pads
8. power switch

Specifications:

1. dimensions: 75 x 32 x 48 mm (W x L x H)
2. calculated voltage adjustable from: 0 - 30 V
3. calculated current adjustable from: 2 - 26 mA
4. current consumption: 40 mA (when testing a LED)
5. power supply: 9 to 12 VDC max. or 9 V battery (not incl.)

datasheet_mk198_en.pdf

schematic_mk198_led_buddy.pdf

manual_wsmi198.pdf

wsmi198_v01.pdf

module_diy_kit_guide.pdf