Best Pcb Layers

DollaTek StepStick 4-Layer DRV8825 Stepper Motor Driver Module for 3D Printer Reprap RP A4988

Simple step and direction control interface.
It can directly interface with 3.3V and 5V systems.
Thermal shutdown overtemperature, shutdown overcurrent, and under-voltage lockout.
4 layers, 2 oz copper PCB for better heat dissipation.

These PCB boards are great for assembly of a point to point style electronics board. Suitable for countless small electronics projects such as building a robot. If you are working with hobby electronics and want a more permanent circuit solution but don't want to design your own PCB, these are great for you!.
The prototyping boards we provide here are in the size of: Dimension: 80mm x 120mm / 3.15 x 4.72 inch (W*L).
They are made of FR-4 glass fiber, double sided with tinned through holes. This is a fast easy way to build small projects, the boards are durable and the tinned holes can take heat without lifting off..
Easy to cut with a rotary tool. The pre-drilled holes in each corner are great for building with two layers..
Please read the measurements before ordering if you are concerned about the size..

These PCB boards are great for assembly of a point to point style electronics board. Suitable for countless small electronics projects such as building a robot. If you are working with hobby electronics and want a more permanent circuit solution but don't want to design your own PCB, these are great for you!.
The prototyping boards we provide here are in the size of: Dimension: 20mm x 80mm / 0.79 x 3.15 inch (W*L).
They are made of FR-4 glass fiber, double sided with tinned through holes. This is a fast easy way to build small projects, the boards are durable and the tinned holes can take heat without lifting off..
Easy to cut with a rotary tool. The pre-drilled holes in each corner are great for building with two layers..
Please read the measurements before ordering if you are concerned about the size..

Terminal Block Breakout Module - for Arduino MEGA-2560 R3. the item has been soldered and assembled..
Terminal block pitch 3.5mm/0.138", wire size range 26AWG to 16AWG, strip length 5mm, screw M2 steel, pin header and cage copper..
With power on LED indicating. red reset button on the side. with a ICSP adapter connect header..
FR-4 fiber glass PCB, dual copper layers..
NOTE: the item not include Arduino Mega module.

Prototype Screw/Terminal Block Shield Board Kit For Arduino MEGA-2560 R3..
FR-4 fiber glass PCB, dual copper layers, size 120mm x 78mm..
Pads grid / pitch 2.54mm / 0.1", hole diameter 0.8mm. Terminal block pitch 3.5mm / 0.138", hole diameter 1.2mm..
Pitch 3.5mm / 0.138" mini terminal blocks, total 84 pins(3pole x24pcs, 2pole x6pcs )..

4 DPDT signal relay module. TAKAMISAWA RY24W-K high quality relays, switch contact material - gold overlay silver-palladium..
Darlington transistor circuits drive relay coil, LED indicator for each relay channel..
High quality screw terminal block. FR-4 fiber glass PCB, dual copper layers..
Taiwan DINKLE fireproof nylon material DIN rail mount carrier (not China low quality carrier), can support width 35mm / 32mm / 15mm rail, and the carrier can be taken apart for panel mount use..
Datasheet: https://images-na.ssl-images-amazon.com/images/I/91Ml0Tph-rL.pdf.

Supports New Intel Core i7 Processor Extreme Edition, Support for DDR4 XMP up to 3333MHz.
4-Way Graphics with Premium PCIe Lane, Dual M.2 Technology for SSD Drive and WIFI card.
Independent Right and Left Audio Channel PCB Layers, High end Nichicon audio capacitors.
SATA Express support for up to 10 Gb/s data transfer.
Thunderbolt Ready, Safer design around screw mounting holes.

2 DPDT signal relay module. TAKAMISAWA RY5W-K high quality relays, switch contact material - gold overlay silver-palladium..
Darlington transistor circuits drive relay coil, LED indicator for each relay channel..
FR-4 fiber glass PCB, dual copper layers..
Datasheet: https://images-na.ssl-images-amazon.com/images/I/91SnxaAOOnL.pdf.

Terminal Block Breakout Shield Module - for Arduino UNO R3. the item has been soldered and assembled..
Terminal block pitch 3.5mm/0.138", wire size range 26AWG to 16AWG, strip length 5mm, screw M2 steel, pin header and cage copper..
Standard IDC40 pitch 0.1" header, you can use 40pin FRC(flat ribbon cable) connector cable connect all Arduino Uno pins to peripheral equipment..
With power on LED indicating. red reset button on the side. with a ICSP adapter connect header. FR-4 fiber glass PCB, dual copper layers..
NOTE: the item not include Arduino Uno module..