Ultra-micro audio, miniature headset production, with original map and PCB ----- mini headphones

Keywords: miniature headset, miniature answer Author: xdy12530 When you are bored, you think out, and successfully produce a supermaphilic audio, a miniature receiver. Amount with Bluetooth headset, huh, huh. Pure entertainment. You can make a play in accordance with the circuit map, but don't use it in the examination room! This miniature receiver is very small, so miniature! The size of only 1/4 size of the coin, most of the original parts of 0402 encapsulated resistance capacitors. Therefore, the welding requirements are relatively high. On the left is a charger interface, you can charge the micro-lithium battery, a yellow-yellow inductor on the right. The middle is the chip TDA7021. This headset, spent 10 dollars to buy miniuro, remove it in the plate and battery Lithium battery and earphone housing. Lithium batteries are 3V voltage. You can look at the size of the board, the battery, and headphones and one dollar coin. Come very small. Put the receiving circuit board into the headset housing, just embedded. I put them all in one by one, the bottom is the headset speaker, the middle is the battery, and the above is the receiving board. A small one. Look up with the coin than the size This is the top layer diagram of the mini-receiver and the underlying map. The miniature receiver is made of double-laminate, how to make a circuit board, huh, this, I don't say it, e-enthusiast knows how to do it. Only on the size of the nail size board, I think everyone is definitely difficult. In fact, it is very simple, just put it 0.5mm turns again to grind it finer. 0.2mm turning head is ok, although it is trouble, it is very practical. However, be careful, 0.2mm is easy to break. I hope everyone can succeed.

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