1. Board size: 89*58mm
2. Board thickness: 1.6 mm
3. International standard board, all solder pads are tin-plated, high-strength fireproof and anti-drop material, which can be disassembled repeatedly.
4. The PCB board design is reasonable, and all commonly used SMD components are used.
5. The left and right 3 columns of components are used to practice soldering, and each column has test points.
6. The circuit in the middle circle is a water lamp circuit, which is composed of CD4017, NE555, and light-emitting diodes. It can work after the welding is correct.
7. There is a ruler on the back of the circuit, which is convenient for measuring components. There are examples of PCB wires to facilitate PCB design and use.
8. The working voltage of the circuit is 3~12V.
9. This kit contains all the components on the following photos.
Returns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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