555 Ding Dong Doorbell Kit (teaching Kit | Training Kit | Electronic production) Simulation Ding Bucket Doorbell Module Board

The main purpose of the DIY production kit is to learn to use, through the hands-on practice, to provide their own knowledge and skills, assembly has a certain risk, need to have a certain electronic basis and practical ability. And each of the hands-on ability, technical level is very big. We can not guarantee that everyone can DIY success, but we can guarantee the circuit principle, PCB wiring is correct. If you have a certain ability, can understand the circuit and know how to judge and repair possible circuit failure, you can 100% successful production, as long as the instructions on the drawings will be installed on the electronic components welding, you can enjoy the success of welding To the infinite fun! The kit is not finished and can not be of the same quality as the finished product. If you can not accept it, or if you have no confidence in your own technology and hands-on ability, please buy it carefully. But we are committed to 100 percent after-sales service, make the greatest efforts to help friends to complete the production. Therefore, when the finished product encountered did not meet the effect we described, please do not rush to our evaluation, remember to contact our after-sales service.

Precautions:
1. Parts of the components are more, if there are individual small pieces inside the package, and hope that buyers understand what, not because of a small capacitor smallResistance to the negative feedback, so very boring, you say it is, we play electronic, this small components are generally prepared, if it is not prepared, findA waste circuit board demolition, of course, we will try to do, try not to let this happen.

2. Components from the small start welding, and then welding large, first welded horizontal, and then welded vertical.
3. Individual components such as resistors and capacitors temporarily out of stock, the seller will send other components near the value of the replacement, the components are not the same batch, the color appearance and so will not and pictures, hope buyers understand the color requirements, Please do not shoot, thank you.