Digital Voltmeter Blue 0V to 30V DC 0.56 LED

2x Protoboard Breadboard 5x7cm EGPC features:
-PCB dimension: 5x7cm
-Hole diameter: 1mm
-Pitch: 2.54mm
-Bakelite with copper fields

L293D Quadruple Half-H Drivers STM features:
-Continue 0.6A half-h driver STM Arduino

Waterproof Electronic ABS Plastic Junction Prototype Box 84x60x34mm features:
- Excellent waterproof performance and moisture proof
- Dimension 84x60x34mm

On top of all the upgrades presented in Nano BLE (64 MHz clock, 1Mb flash memory, 256Kb SRAM) Nano BLE Sense Rev2 brings basic sensors to the table. It is truly impressive how Arduino team managed to fit those on such a small factor, nonetheless they did and did so for 5 basic modules.

In the package, you get 9 axis IMU, humidity and temperature sensor, barometric sensor, microphone and vision sensor (gesture, proximity, color and light intensity). Such a set together with TensorFlow compatibility enables basic machine learning functionalities straight after taking the board out of the box.

LED Diode Assortment Kit 50x Red Green Yellow Blue White features:
  
- Lens color: Red, green, yellow, blue - diffuse, light white
- Size: 5 mm
- Operating current: 20mA
- Voltage (red) 1.8V-2.3V
- Voltage (green) 3.2V-3.4V
- Voltage (yellow) 1.8V-2.3V
- Voltage (blue) 3.0V-3.2V
- Voltage (white) 3.2V - 3.4V
- Anode (A): Positive (long leg): 17mm
- Cathode (K): Negative (shorter leg): 15 mm
- Operating temperature: -25ºC / 80ºC
- Welding temperature: + 260ºC
- Quantity: - 50 units
                  - 10x red
                  - 10x green
                  - 10x yellow
                  - 10x blue
                  - 10x white

Power supply DC 12V 16.7A 200W features:
- Supply voltage: 110 / 230V AC
- Output voltage: 12V DC - Output amperage: 16.7A
- Power at 12V: 200W
- Dimensions: 200mm x 99mm x 43mm
- IP20 ROHS CE

Descent module.
Use a multimeter to check the output voltage and adjust the potentiometer.
Control of voltage and current.
DC Step-Down Converter 5A 4-38v to 1.25-36v XL4015 LED LiPo features:
- Input voltage: 4-38V
- Output voltage: 1.25-36V
- Current output: adjustable, 4.5A (max 5A)
- Output power: 75W maximum
- Operating temperature: -40 to + 85 ºC
- Operating frequency: 180KHz
- Efficiency conversion: up to 96%
- Short circuit protection: Yes (limited current 8A)
- Protection over temperature: the output switches off automatically
- Size: 62mm x 26mm x 14mm
Principal functions:
- Step-down converter with overcurrent protection
- Li-Po battery charger, Li-Ion

XY-V17B is a smart voice module, integrated IO segment trigger, control UART series, ONE_line control of a single serial bus, MP3 standard and other functions; Supports MP3, WAV format decoding, maximum storage capacity on 32G TF card, update audio files from TF memory card via USB data cable to connect computer.
Voice Module MP3 Player features:

- Support MP3, WAV decoder format.
- Support sample rate ( KHz): 8 / 11.025 / 12/16 / 22.05 / 24/32 / 44.1 / 48.
- 24-bit DAC output, support 90dB dynamic range, support 85dB signal-to-noise ratio.
- Fully compatible with FAT16 / FAT32 file system, 32G TF card with maximum support, 32G U disk support.