Hearing aid kit audio amplifier amplifier practical teaching competition electronic DIY interest in making pieces
Features:
Hearing aid kit is composed of microphone, front low, power amplifier circuit and headphone jack and other parts, has the characteristics of high sensitivity of sound reception, for people with certain hearing impairment is very practical, and simple production, low cost. This kit is also an ideal training kit doe learning analog circuits.
Use tips:
After plugging in the headset, there may be scream when the electricity is powered on, you can not put it the ear, at this time to adjust the potentiometer, adjust to the position od not screaming, and then put it in the ear and the adjust until the sound is clear.
The kit does not come with power supply, you need to buy it from our store, thank you
Note that the components on the board should be welded from the small volume to the large one.
Individual components such as resistors and capacitors are temporarily out of stock, we will send the symbol circuit principle of his nearby value of the components instead, the blue metal film resistance may be replaced by gray carbon film resistance, gray carbon film resistance may also be replaced by blue metal film resistance. It has the same effect.
If the welding fails, our shop can only help you to check the problem. We cannot guarantee that you can successfully weld. This is also the reason why maintenance workers are needed on the factory production line. Because the components are welded in the wrong position and other reasons, there is a large chance of problems. Therefore, when the finished products produced.
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