Pocketchip itself does not have a speaker, only provides 3.5mm headphone jack.
Sometimes I do n’t want to wear headphones, I want to put it out, what should I do?
Since Pocketchip has opened GPIO, we can solder ourselves!
This magic reform, the cost is not high, just have a hand.
0. Purchase materials
Without materials, talk about He Mokai.
- 8Ω 23mm small speaker * 2 recommended link
- Mini Class D Amplifier Board * 1 Recommended Link
- Electric iron * 1
- Rosin * 1
- Tin wire * 1
- Hot melt gun * 1
- Hot melt adhesive strip * 1
- 30AWG wire
- High temperature resistant insulating tape * 1
- Welder * 1
- One Pocketchip (I want everyone who reads this)
(The picture above forgot to release hot melt glue and hot melt glue gun)
1. Unplug the power connector
The power interface must be unplugged before welding, otherwise it is not safe.
2. Fixed Class D amplifier board
Before fixing, use high temperature resistant adhesive tape to protect the wafer.
Then fix the power amplifier board with a hot melt glue gun:
3. Start welding
First -solder the power amplifier board to the GNDpin, that is, the negative electrode is grounded
Then connect + 5v (positive) VCC-5V:
Then weld according to the following rules:
L->HPL
⊥->HPCOM
R->HPR
Next, fix the left and right speakers with a hot melt gun:
Then, the right speaker (the left speaker you see) is -connected to the power amplifier board R, -and the other side is connected to R+
Similarly, the positive and negative of the left speaker correspond to the positive and negative of L.
At this point, welding is complete! Plug in the battery interface, fight back, you can try to boot, open a sound game or software, test test.
In this way, the trouble of having to wear headphones is eliminated, but if I want to insert the headphones automatically, I still have to research.