DIY rechargeable desk lamp
Prepare the required tools as shown in the pic, and also need an electric drill.
Prepare a power bank and a plastic box with the size: 190mm * 135mm * 55mm.
Then also need to find four light emitting diode, a lamp base.
Now start to process, the plastic box is made as shown in the pic.
One is the position of the adjustable switch, and the other is the charging position.
We took the power bank apart.
Separate the battery from the board.
Place the circuit board in the position as shown in the pic.
Then we install the lamp and turn it on.
I installed a blue indicator light in the lamp. And I added a resistor in front of the lamp.
Now start wiring, we use the charging circuit board in the power bank for safety, and use the other board for the power supply.
4 terminals control the brightness of the lamp, the big 3 led lights are on is the brightest, the middle is 2 led lights on, the lower is 1 led light on.
If you can find an 8 terminal, you can adjust the brightness in order.
Finished, this can also charge your phone! A long press of switch is for on and off, you can check the power consumption by pressing it.
Looks not bad, and pay attention to the short circuit.
Source from: Rouding.com
Translated by: Utsource