A LED ad light box circuit board and transformer connector, who told me how to connect?
First of all, L and N receive 220V, adjust the ADJ, so that COM is between +V and 5V.+5U connect transformer +V, GND connect transformer COM is OK
Not a single working voltage LED to 12V, unless there is some ready-made products assembled using the 12V power (or even the use of DC 17V power supply) for lighting, if the purchase of the LED lamp operating voltage is less than 12V, direct access to the 12V power supply, current will cause the LED burned; also supply from decorative lamp with discontinuous light the series, normal working cycle intermittent light off.Need to know whether the purchase of the transformer output is DC 12V, maximum output current and voltage; LED lamp or lamps, a specific type of nominal current, to explore how to correct.
The general requirements of LED lamp power supply is DC power supply, a number of LED should also be used in series and each LED is connected with the cathode is first connected to the power anode, a cathode is connected with the second LED of the cathode, anode and then third LED of the cathode, anode and cathode of a power supply (according to the needs and flow resistance considering the limit, otherwise it would not normally lighted);
