sound time capsule

What is a time capsule? The time capsule is here .

What is a sound time capsule? That’s a time capsule that can record sound~

When I was a kid~

I feel like I have a lot of time~

Play happily every day~

Running in the fields~

Playing games on the playground~

Go catch birds in the trees~

Go to the river to catch small fish~

Carefree~

Innocent laughter resounds through the sky~

But those beautiful scenes are only in my memory,

I was not born in this wonderful era of advanced technology,

The scenes in our memories are constantly blurred, incomplete, and even disappear, and the sounds are even more traceless.

This sound time capsule uses a WT chip WTR050 , which is a high-performance recording chip with long recording distance and good sound quality. It can directly drive the 8ohm/0.5W speaker output, and the playback sound quality is clear and the volume is high. , easy to use, through button control, long press recording function can be realized. In addition, it also has loop playback, level maintenance loop playback, short press play and other functions. Inspired by looking here . This recording chip does not require an external memory chip. You can select the recording sampling rate, which will change the maximum recording duration accordingly.

Record graduation and farewell to teachers and classmates~

Record the important moments between couples~

Record the child's first words~

Record and prepare gifts for your future self~

Some people say: Why don’t you use your mobile phone to do these things? You can record, take, and record videos.

That's right, mobile phone recording and video recording is convenient, has large memory, and is clear. But mobile phones are always at hand, and if you use your mobile phone to do these memorable things, then just imagine this scenario: One day, on a whim, you ask your partner to record a paragraph together for future memories. Go to the recorder software, and after you finish speaking solemnly, youTurning around and clicking on King of Glory, she turned around and opened Douyin TaobaoYou turn around to do the laundry, and she goes back to the kitchen to cook, emmm

Lu Xun never said: Life needs a sense of ritual .

We always need something with a sense of ritual to remind us that life, in addition to the present, also has poetry and distance. So why not choose to use your carefully crafted PCB to make a sound time capsule, choose a sunny afternoon, tell her the words for your future self, and then find a secret place to treasure it together? Woolen cloth

So how to make PCB capsules? It relies on precise board-making technology to make notches and put them together. The approximate effect is as shown in the figure. Two two-dimensional capsules are put together, and rounded up, it becomes a three-dimensional capsule.

The reason why the battery holder is used here is that there are many ways to connect the power supply. The AA battery has been around for so many years and will not be eliminated easily. If you really take this out after many years, I hope you can easily find the battery. to start it.

Some lines can actually be left unconnected, because there are several solder joints after they are put together, and the whole thing is connected after welding them together. However, the EDA project is incomplete without it.

ああ, after finishing the painting, I found that one end was covered with silk screen and the whole thing was a small blue pill er

2020/7/29：I got the board today (finally); it seems to work pretty well. Not much to say, the four in the picture above are piled up directly. .

Next, there are still components missing.

2020/8/3：That's it. This is a demonstration of the welding effect /* (Because I had welded a few fixed solder spots before, and then the board was tilted like this, and the components were soldered in various positions.*/

For power supply, I used a 2mm socket, which happened to be connected to the 18650. The single power supply unit is 18650. Next is the usage demonstration. This is really fun.

In the summer in the countryside, cicadas are chirping. Let’s see if I can use this to record it.

One more thing, listen to what I recorded for you?

--"over"--