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Voice activated LED Water Light Kit CD4017 Lantern Control Fun Electronic Production Teaching Training Diy Electronic Kit Module

원래 가격: $4.현재 가격: $0.

설명

Price: [price_with_discount]

Parameter:

Circuit board: thickness 1.5mm, length 65mm, width 27mm
Power supply voltage: 4-12V DC voltage, the higher the voltage, the brighter the LED will be.

Features:
The circuit of this kit uses sound to control 10 LED flowing water, which can display the function of CD4017 very intuitively. It is a kit for learning counter, frequency divider, and color light controller. At the same time, the kit has a very good effect, very interesting and practical.

Precautions:

Identification of the positive and negative poles of the microphone (the pin with three wires at the bottom connected to the shell is the negative pole!)

Precautions:

1. Note that the components on the board should be soldered from the smaller size, and then solder the larger ones.

2. Individual components such as resistors and capacitors are temporarily out of stock. We will replace them with components of other nearby values based on the symbol circuit principle. The blue metal film resistors may be replaced with gray carbon film resistors, and gray carbon film resistors. It may also be replaced by a blue metal film resistor. It is the same effect.

3. After welding, please debug it by yourself. If the welding is correct, the welding will usually be successful. If the welding fails, our shop can only assist you to check the problem. We cannot guarantee that you will be successful as soon as the welding is completed. This is why the factory production line needs repairs. Because of the workmanship, electronic products are broken down by static electricity, because the positive and negative electrodes of the power supply are connected incorrectly and burned out, because of false welding, because of the wrong position of the component welding, etc., there is a high probability of problems. Don't always say that there is a problem with the board circuit. Yes, this board has sold tens of thousands of people, and dozens of people have problems! We promise to do our best to achieve good after-sales service, and do our best to assist all friends to complete the production. Therefore, when the finished product does not reach the effect we describe, please do not rush to give us an evaluation, remember to contact our after-sales service, we will do our best.

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