1 2 3 4 Button Key Membrane Switch Matrix Keypad Matrix Control Panel Pad DIY Kit for Arduino

Fixed turn the lamp current to 0.1 times the value of the constant current (charge when used to identify whether the battery is full); 2. Increased input reverse polarity protection diode; 3. Using dedicated reference IC, and high-precision sampling resistor, so that the constant current is more stable, (20 degrees to 100 degrees, the constant current 1A, when the temperature drift of less than 1%).Particularly suitable for LED driver *High-power LED constant current drive *Lithium battery charger (including ferroelectric)