How to make the picture material of mobile advertising light box?

First, buy a PVC board with the size you need, write the advertising words you want on it, then drill all the holes in the font to install LEDs, then buy highlighted LEDs on the board in the electronic component market or Taobao, connect all LEDs in series every four, and finally connect them in parallel (working voltage is 12V). Choose a switching power supply with 12V according to the number of LEDs. If you want to spend a little, you can make a frame with colored LEDs.

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