Best Four Layer Pcb

Gikfun Electronic Hourglass led DIY Kits Welding Practice Board Blue Ray EK1886

This is a beautiful electronic hourglass that is fun to build and nice to look at when finished, it is not only a PCB board for practicing welding....
Comes with English user manual and online PDF file, which will guide you how to finish step by step, perfect for school basic electronics experiment....
The suite adopts double layer PCB, and the circuit consists of 30 pieces white LED blue ray..
Under the control of MCU program, it displays analog hourglass image..

250pcs standoffs are made of durable environmentally friendly nylon PA66, which has stable and long-lasting acid resistance, alkali resistance, insulation and signal interference resistance..
The waterproof nylon spacer support is rust-proof and easy to clean. You only need to clean it with a cloth..
There are 4 different kits to meet your building needs, including various male or female brackets, nuts and screws..
Threaded standoff is very suitable for installation between the PCB circuit board and the machine board. It is very suitable for creating hot channels between chips, or creating multi-layer and multi-layer "nerd" homemade circuit board arrays..
They are not easy to slip when used correctly. It is very suitable for installing boards between PCB circuit boards and machines, and is widely used in communications, electroplating, medical equipment, office equipment, electronic products and other industries..

Integrate 2560 and Ramps1.4 one PCB,which designed to avoid complicated connections, easier wiring and more stable Use high-quality 4 layer PCB&Use special power chip,support 12V-24V, also Use Run Marlin firmware,same as configuration way as Ramps1.4, it can replace Ramps1.4 directly..
Use high quality MOSFET tube,better cooling and more stable.Use special power chip,support 12-24V input,reduce the heated bed current to 1/4 that slove the Mosfet heat problem efficiently and power shortage..
Support a variety of stepper drivers: A4988,DRV8825,TMC2208 and TMC2100, and available to work with LCD2004,LCD12864,MKS TFT24/28/32/35 & Available to connect external large stepp drivers, A4988 driver board widely used in 3D printers and small CNC machines..
Support functions: Non-trace resumption after power off, run out filament ,and auto shut down, XTZ axis with different color terminal controls the motors and end stop,which is convenient to wire.Use high-quality 4 layer PCB&Use special power chip.Retail Servos,AUX-1 and AUX-2 interface of Ramps1.4 provide three 5V output and three 12V output interfaces..
Five different step resolutions: full-step, half-step, quarter-step, eighth-step, and sixteenth-step.Adjustable current control lets you set the maximum current ....

【Silencer Kit】- These four pieces of silencer pad silencer foam sound dampeners are to eliminate noise and improve the effect of consumers using mechanical keyboards. This will be an essential tool for those who are keen on DIY mechanical keyboards..
【Product Function】- Silencer pad is placed between the PCB and the positioning plate to reduce cavity noise. The switch pad reduces the gap between switches and eliminates cavity sounds. The bottom cotton eliminates the noise in the cavity between the PCB and the bottom shell of the keyboard and increases the sound thickness. The role of the gasket is also silence the sound..
【Compatibility】- 100% compatible with 61 keys ANSI mechanical keyboard layout. Please note that normal 61-key layout mechanical keyboards do not have no arrow keys..
【Advantage】- These four keyboard foams are made of soft sponge material, which can well protect the mechanical keyboard and switches, reduce noise and enhance the sound thickness of the keyboard..
【Package Included】- 1* Silencer Pad, 1* Switch Pad, 1* Bottom Cotton, 1* Gasket.

【FUNCTION】It is a new project to update the keyboard by filling the gap between the switch and the pcb, reducing vibrations and typing sounds..
【CHARACTERISTICS】We customize the bottom of the material has a layer of film plus non-stick adhesive backing will be more resistant to tearing, support repeatedly tear off and then stick on..
【SET MATCHING】You can place the Keyboard switch pads directly on the PCB with tweezers without disassembling the keyboard..
【MATERIAL】Made of 0.5mm thick Poron high-density memory foam..
【PACKAGE INCLUDES】Keyboard switch pads*120 x 1 , Tweezers x 1..

The SpeedyBee Advantage: Download SpeedyBee App on your mobile devices, free to change the settings of flight controller and ESC anywhere without a computer..
Wireless FC ESC Tuning: Connect the SpeedyBee app via Bluetooth, configure the UART Ports,PID,OSD and every other settings on this flight controller and BLHeli_S ESC in this stack wirelessly..
Change motor directions wirelessly: It’s convenient to change the motor directions just in a few simple steps on SpeedyBee app..
Real 35A BLHeli_S ESC: 6-layer 2oz PCB plus optimized circuit design equals stable and strong current output. The four-channel continuous 140A output can reach 30 seconds..
Revised CPU, More durable: SpeedyBee 35A Mini ESC designed to give your motors smooth power with great stability and durability, more affordable.When there is any question, please feel free tell me ,we will solve it for you soon!.