3x Heat Sink Aluminium Adhesive A4988 DRV8825

40x Female-Female Cable 20cm features:
-Length: 20cm
-Quantity: 40 wires
-Dupont female connectors on both ends
-Compatible with 2.54mm male connectors
-High quality and good working condition
-Easy to install and use

Pulley GT2 16 Teeth 6mm Aluminium Pulley 3D Printer Reprap features:
- Number of teeth: 16
- Pitch: 2mm
- Material: aluminum alloy
- Outside diameter: 13mm
- Inner hole: 5mm
- Use with strap: 6mm
- Quantity: 1 unit of 16 teeth GT2 pulley, 6mm wide and 2 studs
- Ideal for fix on the axis of the motors of your 3D printer

Power Supply Transformer 220V AC/DC 2A 12V features:
- Input voltage: 100~240V 50Hz
- Output voltage: DC 12V
- Output current: 2A
- DC connector: 5.5 mm x 2.1 mm
- Cable length: Approx. 90 cm
- Indicator of operation: LED diode

It is very easy to make it work with an Arduino, PIC or any other microcontroller.
In its output pin we will be able to measure the PWM pulse width depending on the distance of the obstacle.
HC-SR04 Ultrasonic Sensor Distance Measuring Module features:
- Supply voltage: 5V (4.5V- 6V)
- Consumption: 30 mA typical, (35 mA max)
- Interface: VCC , GND, Signal
- Range: 2 cm to 3 meters
- Angle 15º
- LED indicator of measurement in progress
- Frequency: 40 kHz for 200 µs - Size: 30mm x 20mm
- Quantity: 1 unit
Useful links for Arduino / Raspberry programming and projects with boards Arduino / Raspberry:
Automatic robot operation with obstacle detection />

Isopropyl alcohol is used for cleaning: - of electronic devices, such as contact tips (such as those of ROM cartridges)
- magnetic tapes and disk heads (such as those of audio and video recorders and flexible disk drives)
- laser lenses in optical disk drives (for example: CD, DVD) and the removal of thermal grease from heat sinks and integrated circuit packages (for example: CPU)
-the keyboard and the LCD screen

M12 Inductive Proximity Sensor NPN DC 6-36V LJ12A3-4-Z/BX 3D Printer features:
- This sensor can be configured as Z axis auto level
- Inductive proximity sensor detection switch LJ12A3-4-Z / BX
- NPN DC6-36V
- Often used for 3D printer bed leveling
- Typical application: 3D printer bed level sensor
- Type of Cylindrical DC cable 3 type of cable (black, brown, blue)
- Inductive sensor type
- NPN NO (Normal Open)
- Detecting Distance 4mm
- DC supply voltage 6-36V
- 300mA current output
- 0.5KHz response frequency
- Detects iron / aluminum
- Operating temperature -25 ° C to + 55 ° C (Condition non-freezing)
- Head diameter 12 mm
- Size 6.2 x 2cm
- Cable length 100cm

Tower Pro Micro Servo 9g SG90 features:
- Operating voltage: 3.0-7.2V
- Speed (4.8V without load): 0.12sec / 60 degrees
- Strength: 1.2kg / 42.3oz (4.8V); 1.6 kg / 56.4oz (6.0V)
- Working temperature: -30 to +60 degrees C
- Cable length: approx. 23cm
- Includes photo accessories and screws
- Dimensions: 22x11.5x27mm

3A DC Converter 1,25-32V Adjustable LM2596 Step Down Module features:

- Based on the LM2596S-ADJ regulator
- Rectification: Asynchronous
- Output Voltage: 1.25v - 32v DC (adjustable)
- Voltage of Input: 3.2v - 35v DC
- Max Output Current: 3A (with heat sink)
- Ripple at output voltage: 30mV
- Frequency: 150KHz
- Max Conversion Efficiency: 92%
- Load Regulation: ± 0.5%
- Voltage Regulation: ± 2.5%
- Operating Temperature: -40ºC to + 85ºC
- Measurements 43x 21x 14 mm