1x4 Matrix Keypad MembraneDC 12V 14 Key Matrix Membrane Switch Keypad is a high quality product at a very low cost for your Applications needs. This 4 button keypad provides a useful human interface component for microcontroller projects. Convenient adhesive backing provides a simple way to mount the keypad in a variety of Applications. The Keypad 14 features a total of 4 buttons in Matrix form. This is a membrane keypad with no moving parts. A female 5 pin berg connector is

CTR > 44% at IF = 10 mA

The tape is solderable

so if you're looking for an IC to provide optical isolation in your circuit design

Mini Square Voltmeter AC

Load Voltage: AC 250V/10A

ON and OFF

Item Type Liquid Flux Colour Clear Volume 100ml

10A @125V AC Maximum DC Load Current 10A @28V DC Coil Power Consumption 0

power supply can effectively reduce the operating current of the pixel LED and decrease the voltage drop of the PCB

These are Metal Film Resistor with a value of 200k ohm 1/4W and tolerance of ±1%

jointing insulation panels

The 2E SMD Resistor is a conventional thick film chip resistor and is a type of surface-mount resistor