
If you are interested in DIY micro switches, you might want to take a look at this article.
If you just happen to have an electric screwdriver and want the front LED light of the screwdriver to turn on first, this can help you operate more easily in low-light environments, so you come up with the idea of adding a micro switch to the electric screwdriver.
First, you remove the four screws and the screwdriver bit.

Then you remove the fixed collar.

Next, you take out the battery.

Then you remove the five screws.

Next, you remove the two clips in the electrical section.

Then you separate the electric screwdriver into upper and lower parts.

Next, you remove the controller and other components.

You then dismantle a limit switch from a discarded motor core.

Then you remove the unrelated plastic clips.


You then attach the limit switch onto the electric screwdriver.

You use a file to remove the excess parts between the upper cover and the limit switch.

Then you redesign the circuit, and the principle is shown as follows.

You proceed with soldering.

You drill a hole on the trigger.

You reassemble everything.
The process is completed.

