This is an led driver like before. but this drives the leds using current regulate. This driver regulates the current by using the potentiometer to get the correct current. To use the driver, you turn the potentiometer all the way down, then you connect the leds to the circuit and the power supply, then connect the ammeter or multimeter, setting to current mode and highest settings across the 1 ohm resister test point. Slowly turn the potentiometer up until the correct current for the leds is read on the ammeter/multimeter or the leds are lit a the right brightness for you.
On the left is the pin out for the lm 317, connect it correctly in the circuit, if not it could be damaged.
