Item Category: Electrical Equipment & Supplies

☆ Welcome☆ to ☆ my ☆ shop ☆ 【Great School Science Project】: The DIY Clock Kits are used to installed to a 6-Digit Digital Electronic Clock. It is widely used in schools to help students learn basic mechanical and electronic skills. It's a great Science Fair project. Highly recommended to practice soldering skills enjoyably for you and your kids.【Easy Assembly】: In addition to teaching basic mechanical and electronic principles, the clock kit is easy to build and is so simple. The connection that was clearly mapped and labeled on the board makes it easy to assemble. It's often used to teach basic soldering skills. It's a great first kit for any STEM student. No programming is required.【Wide Time Functions】: Wide functions with clock, time set, alarm set, countdown timer, stopwatch, counter, hourly chime, precise time display, and 24 hours format. Accurate Travel Time--the error range ±1 sec every 24 hours.【Parameters】: This Electronic Clock Kit is equipped with AT89C2051 master chip. Military-Grade FR-4 PCB board(Size: 7"x2"(92x49mm)). Comes with a 150mm power supply wire for DC 7~12V voltage input, typical applications is 9V. You can connect the power cable with a battery box with 5xAA batteries or power adapter that can supply 7-12V voltage to make it work.【Perfect After-Sale Service, Supports Wholesale】: This product is DIY kits, not the end product! This Soldering Project requires basic electronic knowledge and hands-on ability. Please read the manual before soldering. Any issues, please do not hesitate to contact us directly for further help. WHDTS has long been engaged in Electronics Related Products wholesale and retail business. Welcome letter to discuss the wholesale business. The bigger the amount is, the more favorable the price is. Product Description6-Digit DIY Digital Clock Soldering KitsGreat School Science ProjectEquipped with AT89C2051 master chip, DC 7~12V voltage input. 24 hour display format.The connection that was clearly mapped and labeled on the board makes it easy to assemble.The DIY Clock Kits are used to installed to a 6-Digit Digital Electronic Clock. It is widely used in schools to help students learn basic mechanical and electronic skills. Highly recommended to practice soldering skills enjoyably for you and your kids.Features1>.Alarm clock2>.Stopwatch3>.Countdown4>.Counter5>.Pure work soldering6>.Integrated practice area and functional test area7>.LED demonstration exercise results8>.Easy operationSchematic as below pictureMore tips about the DIY soldering that will directly affect the performance effect of the finished product as followed:1). Pay attention to the positive and negative of some certain components. Make sure that all the components were soldered at right place in the right direction.2). Make sure bonding pad not peel off and no pseudo /float soldering. (If it's not, you can repair the welding or reconnect adjacent components with superfluous metal pins to work things out.)3). The soldering iron mustn't touch the components more than one second, or the high temperature of the soldering iron will damage the components.4). Strictly prohibit short circuit.5). If the soldering failed, it can be repaired through sucking out the components and re-soldering by means of a solder sucker.6). User must install the LED according to the specified rules. Otherwise some LED will not give out light.7). Install complex components preferentially. Package included:1pcs 6-Digit DIY Digital Electronic Clock Kit Alarm Clock Kit for Soldering PracticeShipping> We ship to worldwide.> Orders processed within 24-48 hours after payment verification.> We only ship to confirmed Paypal addresses. Your Paypal address MUST MATCH your Shipping address.CountryShipping WayShipping TimeTrackable United StatesUSPS(ePacket)7-18Yes RussiaChina Post15-35Yes Other CountryEconomic Air Mail15-40NoIf you need register mail or other express shipping, Pls contact us. Warranty & Guarantee> Good good quality. Buy with confidence!> Returned & Guarantee. If not satisfied with the item, you can choose to return it for a replacement or money back. We afford all cost if it's our fault. Exchange or refund.Please contact me before you return it. full refund after we receive our original item.> We maintain high standards of excellence and strive for 100% customer satisfaction! Positive feedback is very important to us. We request that you contact us BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns Contact us> Our goal is customer satisfaction!> Our Working-time From 8:30 AM to 21:30 PM(GMT+08) .> We strive to provide you with the best service, we will reply your question within 24 hours.( IF have any problem, we will appreciate that you contact us first BEFORE open a dispute or request, we will try our best to solve the problem with you. ) Payment> We accept Paypal only, It is fast, easy and safe.> Payment must be completed within 7 days.> PLEASE NOTE: S&H DOES NOT INCLUDE DUTIES, LOCATL TAXES OR ANY OTHER IMPORTATION FEES. About me Please contact me first before you leave a negative review if my item are damaged or defective when you got it, I'll do resend or refund (as your choice) once I confirm with that, which is a most kind of favourable way to both of us work things out together.Your support and comprehension are highly appreciated for me. Thanks for everything, and at last, I full of expectation to do business with you!!!!