4 x 1.5V AA battery holder with cover and On/Off Switch XIAO Boards also known as veroboard or

also known as veroboard or DOT PCB

SanDisk 32GB Micro SDHC Memory Card

We chose a very high resistance resistor R1 because most of the light through the finger is absorbed

The CC3000 from TI (Texas Instruments) is a self-contained wireless network processor that makes incorporating internet connectivity into your project simple

4 x 1.5V AA battery holder with cover and On/Off Switch XIAO Boards also known as veroboard or4 x 1. 5V AA battery holder with cover and On Off Switch This 4 x AA 1. 5V battery holder case is ideal for projects that require a 3V external battery. It is designed to hold 4 AA batteries, which are connected in series to provide a combined output of 3V. The holder features a plastic cover that can be locked to protect the battery cells from environmental factors. A removable sliding cover is also included, which is secured by a small head screw.