Timers are now widely used in many applications, such as electric vehicle charging with timing charging protection, and some functional networking timing controllers. So how do you make a timer?

Step 1: Material Tool Preparation

1, a plastic case 1

2, timing controller 1

3, 1 input and output power interface

4, other wire tools, etc.

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Step 2: Installation Input Socket

Install the 8-shaped power socket in the original empty slot of the plastic box, just the right size and open the hole in the lower-left corner of the front panel for installing the USB socket as the power output interface.

Step 3: Switching Power Supply

Adjust the installation position of the switching power supply

Step 4: Cutting Board

Solder the USB busbar to the universal board, and solder the connecting wires of the positive and negative poles to cut the appropriate size for easy installation.

Step 5: Glue Fixing

Install the USB socket, adjust the corresponding position, and fix the whole small module with hot melt adhesive.

Step 6: Test Location

The fixed USB socket is filled with hot melt glue to fill the empty slots, and the modules are welded and connected. After soldering, the test position is just right and the size is just right.

Step 7: Button and Buzzer Hole

The upper panel opens the hole according to the position of the corresponding component, first opens the hole of the digital tube, and then continues to open the hole of the button and the buzzer position.

Step 8: The Effect After Closing the Lid

Close the upper panel and complete the overall production

Step 9: Plug Identification

The power-on test works perfectly, and finally, the screw can be used, and the production is over. Attach the operation button logo and the label next to the input and output plug.