Features: _x000D_ Two heat sinks ensure a better heat dissipation and more stable performance. _x000D_ LED indicator light on board make work state more intuitive. _x000D_ It has a wide range of input voltage from 7V to 36V DC and output voltage from 1.5V to 35V._x000D_ _x000D_ Comes with 2 acrylic boards and many standoffs, screws that you can make an outer covering._x000D_ _x000D_ Widely used for storage battery, power transformers, DIY adjustable regulated power supply, industrial equipment, etc. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Input Voltage: 7V-36V _x000D_ Output Voltage: 1.5V-35V _x000D_ Voltage Difference: 1.5V _x000D_ Output Current: Max. 10A (Adjustable, recommended in 8A; 5A 70W or less at room temperature can be natural cooling, otherwise please enhance heat dissipation. Constant current can only be adjusted when output voltage is above 2V. Current adjustment can only work at constant current state) _x000D_ Output Power: Max 150W (recommended in 100W, please reduce power when used at large voltage difference) _x000D_ Temperature: -20~ + 75(enhance heat dissipation if power tube temperature is overheated) _x000D_ Operating Frequency: 300 kHz _x000D_ Max. Conversion Efficiency: 95% _x000D_ Short Circuit Protection: Yes, the set constant current value _x000D_ Input Reverse Polarity Protection: No, please add a diode _x000D_ Anti-reflux Output: No, please add a diode for charging _x000D_ Size: 80 x 53 x 35mm / 3.15 x 2.08 x 1.37" _x000D_ Setting: _x000D_ Setting button can set three display modes: _x000D_ 1, F-0 mode: Display output voltage; _x000D_ 2, F-1 mode: Display input voltage; _x000D_ 3, F-2 mode: Alternately display input and output voltage; _x000D_ Press the "SET" button to cycle three display modes, the corresponding led indicator will be on or off, then press the "ENT" button to save and exit. Press the "ENT" button only to turn on/off LCD screen backlight. _x000D_ Manual Calibration: _x000D_ Voltage: Press and hold "SET" button then power on to enter voltage calibration mode, screen starts to flicker. Release "SET" button, press "SET" again to increase, press "ENT" to decrease, then you can calibrate the input voltage. It will automatically save after 2 seconds. _x000D_ Current: Press and hold "ENT" button then power on to enter current calibration mode, screen starts to flicker. Release "ENT" button, press "SET" to increase, press "ENT" to decrease, then you can calibrate the input voltage. It will automatically save after 2 seconds. _x000D_ If the output voltage cannot be adjusted, it is because the default voltage is about 20V. Anticlockwise rotate ADJ-V 10 circles above till voltage value has changed, then the voltage can be adjusted normally. _x000D_ Applications _x000D_ Note that constant adjustable current need the true load output current to be more than the set current in order to enter constant current mode, otherwise it will be constant voltage state. Constant current state will be enabled when output voltage is above 2V. _x000D_ 1. Use as an ordinary step-down modules with over-current protection capabilities. _x000D_ Instructions: _x000D_ (1) Under no-load conditions, adjust the "constant voltage potentiometer "ADJ-V", so that the output voltage reaches the value you want; _x000D_ (2) Outputs directly shorting module (coarse find articles or forceps wire shorted to the output terminal, NOTE: Do not short-circuited when the tune voltage), then adjust the constant potentiometer "ADJ-I" make display the current value reaches the pre-set value of the over-current protection; or connected to the load current is also adjustable. (Such as on-board ammeter shows the current value of 4A, then the module maximum current is limited to 4A, 4A constant current LED current to the red light) _x000D_ (3) Connected to the load and work. _x000D_ 2. Use as a battery charger _x000D_ Instructions: _x000D_ (1) Determines that the battery float voltage and charging current; (lithium parameters if 3.7V / 2200mAh, then float voltage of 4.2V, the maximum charging current 1C, namely 2200mA) _x000D_ (2) Under no-load conditions, adjust the "constant voltage potentiometer "ADJ-V" so that the output voltage reaches the float voltage; _x000D_ (3) outputs directly shorting module (coarse find articles or forceps wire shorted to the output terminal, NOTE: Do not short-circuited when the tune voltage), then adjust the constant potentiometer "ADJ-I" make display the current value of the charging current reaches a preset value; or connected to the load current is also adjustable. _x000D_ (4) Charge turn lamp current factory default is 0.1 times the charging current; (Battery during charging current is gradually reduced, gradually converted to constant voltage charging by the constant current charging, if the charging current setting is 1A, then when the charging