DIY Record: Daren teaches you how to make LED light stylus

The main function of the stylus of the handheld computer is for handwriting input and "pointing" work on the touch screen of the handheld computer. Through a few days of experience and research on my handheld pen, I think a suitable stylus should have the following characteristics:

1. The tip should be as small as a regular pen, and the pen should have enough hardness so that it can be fluently written on the small screen of the handheld computer without affecting the user's viewing of the screen content.

2. The tip should be smooth so that it does not scratch the delicate handwriting screen. Be aware that the handwriting screen is a layer of plastic film that is not too hard or strong, and is easily scratched by hard objects to leave scratches that are difficult to remove. Too many scratches will eventually affect the clarity of the screen. Moreover, most of the manufacturers do not provide a touch screen replacement service; even if such services are provided, the price is very scary - not less than one-third of the price of the whole machine.

3. The pen is to be called. The input of the handheld computer, especially the Chinese character input, basically relies on this small pen. If writing on the handheld computer can be as smooth as we usually use paper and pencil! What's more, for most fat friends, using the stylus for a long time every day, having a hand-written stylus can greatly improve the efficiency of using a handheld computer.

Analysis of the above characteristics we can see that the key of the stylus is on the pen, which is the part of the stylus that is in direct contact with the handheld computer. If we can find the right pen, and then directly install the pen to the ordinary pen we use, we get the stylus that satisfies the above three conditions. Of course, if you want to add some new features, otherwise I just need to wrap the original stylus on the tape, although it is ugly.

Although I didn't think of any suitable new features for a while, I still gave up the idea of ​​wrapping tape. It wasn't that I was a perfectionist. It was just a sloppy ghost for me. The pen is lost, so it doesn't matter if you don't even have a hand. First pay attention to find the material and then talk.

First of all, I found a pen that I felt like a hand. I usually use a ballpoint pen, and because the hand is bigger, I feel a little thicker.

Then is to find the most critical part - the writing supplies. After many days of hard searching, I finally found it, he is --- LED ! what? led? Have you made a mistake? Correct! It is it, it can also shine, cool? ! The general LED is divided into two specifications: 5 mm and 3 mm (the full name of the LED is a light-emitting diode. According to its shape, it is divided into square and round, and the circular shape is divided into 3 mm and 5 mm according to its diameter, that is, ? 5 mm and ? 3 mm. I used a profiled one, so I gave the specific model.) It is of course too big to take them as a pen. I used the red bright LED with 123ID produced by Taiwan Jiaguang and the green high-brightness LED with the number 203GD10-001. It should be easy to buy in the local electronic equipment market.

led

The front small head is only one millimeter in diameter, and it is particularly round. The material itself is epoxy resin, which has sufficient hardness and smoothness, and is easy to fix. It can be fixed directly on the nib, leaving the lead wire connected to the power supply. Can shine!

Ok, since the pen and the pen are all selected, let's take a step-by-step look at how to make this cool cool stylus. First we need to prepare the other materials we need, including switches, batteries, wires and super-adhesives (an organic adhesive); we also need some tools such as utility knives, tweezers and electric soldering irons.

1. Study the structure of the pen

Because we want to place batteries, switches and other components in this pen, we must first analyze the structure of the pen to determine how these components are placed. Remember the experience of unpacking all the detachable pens in the pencil case when you were bored in elementary school? Play your talent now, take it apart!