This is the basic L7805 voltage regulator, a three-terminal positive regulator with a 5V fixed output voltage. This fixed regulator provides a local regulation, internal current limiting, thermal shut-down control, and safe area protection for your project. Each one of these voltage regulators can output a max current of 1.5A.
This is a MiFare Classic card - often used for electronic locks or customer identification but also found in other systems where a small and easy to carry tag is desired. The tag contains a NXP S50 chip and an antenna, and is passively powered by the reader/writer when placed a couple inches away.
This is a coin cell holder for the common CR2032 type battery. The holder has a neat pop-in, pop-out feature that makes changing the battery easy. The feet of the holder have a small hole that allow it to be sewn without modification.
The Potentiometer brick produces analog output between 0 and Vcc (5V DC witd Seeeduino) on its D1 connector. The D2 connector is not used. The angular range is 300 degrees witd a linear change in value. tde resistance value is 10k ohms, perfect for Arduino use. tdis may also be known as a rotary angle sensor.
A button is a button, and an LED is a LED, but this LED illuminated button is a lovely combination of both! it\'s a medium sized button, large enough to press easily but not too big that it gets in the way of your project panel. It has a built in LED that can be controlled separately from the switch action - either to indicate or just to look...