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USB Detector Current Voltage 3V-9V Tester Dual USB Dual display (USB Docter Dual)

Use the USB Charger Doctor to measure the working voltage and current output for any USB port and project. This plastic dongle plugs between a USB device, and passes the data lines through. There's a 0.05 ohm resistor in line with the power pin that is used to measure current draw. The Doctor's digital display instantly reads the numbers out for testing devices such as chargers, cables, and cell phones.

You can use this device from 3.5-7VDC input voltage (although most USB devices tend to hover around 4.75 to 5.25) and up to 3A of current. It displays both voltage and current readouts. It's a very handy tool for testing USB devices, checking load levels and debugging battery chargers and boost converters.


Voltage range: 3.3V-9V
Current range: 0-3A
Voltage display: red
Current display: blue
Out put : 2 USB
Size: 52mm x 34mm x12mm
Weight: 16g
Shell color: Dark black

What's in the box?:

1 x Voltage Tester Dual USB

R179.90  Inc VAT
8-Channel 3.3V to 5V Voltage Converter Module for Raspberry Pi - Blue (8ch blue convert logic)
Raspberry Pi and jumper cables are not included.

A DC-to-DC converter is an electronic circuit or electromechanical device that converts a source of direct current (DC) from one voltage level to another. It is a type of electric power converter. 

Ideal for reading high 5V sensors on your SBC or Microcontrollers, or sending signals to 5V input devices


- Mutual conversion between 3V and 5V, It's convenient for PI connected to external 5V sensors or modules
- Supports total of 8 channels
- Range of voltage converted: 1.8V~6VDC

How to Use:

In the case of translating between 3.3V and 5V system:
VCCA connects to 3.3V power supply
VCCB connects to 5V power supply
GND connects to power negative pole respectively, the two power supply should be common-grounded with each other
When Ax has 3.3V input, Bx will get 5V output
When Bx has 5V input, Ax will get 3.3V output
NO direction control required

What's in the box?:

 1 x Voltage Converter Module
R47.90  Inc VAT
DC 3V Mini Motor 130 (3V dc motor mini)

This high-power, 130-size brushed DC motor can be used as a direct replacement for lower-power 130-size motors to get more torque and speed out of your gearmotor, but it will also draw more current and typically wear out faster.

It has a recommended operating voltage of 1.5 V to 3 V, but it can operate at higher voltages to provide more power in exchange for longevity of the motor.

Approximate specifications at 3 V: free-run speed of 20,000 RPM, free-run current of 350 mA, stall current of 4 A, stall torque of 55 gf-cm (0.75 oz-in).

Motor size: 38x20x15mm
Shaft diameter: 2mm 
Axial length: 9mm 
Voltage: 3-6V
Package Includes:
1 x DC 3V Mini Motor


Getting started with Raspberry Pi gpiozeroMotors
Controlling DC Motors Using Python With a Raspberry Pi
R13.90  Inc VAT
Battery Box 2xAA (3V) No Switch (3V AA switch battery box)


This battery box is designed for use as a nice switchable, portable power pack, and fits any two alkaline or rechargeable AA batteries in series. The body is moulded in black ABS Resin and has a slide on detachable lid which can be locked for extra security through use of a small provided screw. Connection is via two flexible stranded red (positive) & black (negative) 26AWG wire leads, which are approximately 150mm in length.

The two batteries are held in series, for a nominal output of 3V DC (AA Batteries @ 1.5V each).
  • Battery Cell Size AA
  • Number of Cells 2
  • Body Material ABS Resin
  • Height 19.0 mm, Length 68.0 mm, Width 33.0 mm
  • Terminal Type Wire Lead
  • Type Battery Box
  • Weight 0.01900 kg

What's in the box?

1 x battery box
R34.90  Inc VAT
3V-7V DIY Light Shock Absorbed Tank Robot Chassis With 130 Motors (tank chassis shocks)

This is an excellent lightweight plastic tank frame used for the manufacture of tank toys or robot projects. It has a good shock absorption effect, you can press up to 0.7cm on it.  With a general 130 motors which you can replace with the same high quality motor. This plastic tank frame supports a voltage of 3V to 7V and can be used with many systems.


1. Only 166g in weight
2. Good damping effect, you can press down to 0.7cm
3. With general motors 130, support 3-7V voltage
4. With the DC charging port at the bottom of the tail


  • Size: wide 9.7cm* long 18.5cm* high 5cm
  • Voltage: 3-7V
  • Motors: 130
  • Weight: 166g

Package Included:

1x Tank Robot Chassis

Read the Docs
R419.90  Inc VAT
DC 4x8mm DC1.5-3V Micro Coreless Vibration Motor (vibration motor)

Vibration motor is a compact size coreless DC motor used to informs the users of receiving the signal by vibrating, no sound. Vibration motors are widely used in a variety of applications including cell phones, and many other hobby projects.

Motor Diameter: 4mm
Motor Length: 8mm
Eccentric Wheel Size: 4.4x4.4mm
Voltage: DC1.5-3V
Current: 0.15-0.23A

Stable and reliable performance.
Easy disassembly type.
Easy to clean and maintain.
Excellent quality and long service life.
Has been widely applied in RC car, RC aircraft.
Package Includes:
1 x  Vibration Motor
R35.90  Inc VAT
RPIZ_CT3V1 3 current and 1 Volt 30A AC adapter for Raspberry Pi zero (lec zero 3 current 1 volt)

The RPIZ_CT3T1 is the same unit as the RPICT3V1 in the Raspberry pi Zero format.

Refer to the RPICT3V1 for full documentation.

Use with sct-013-000 split core current sensor and 230VAC to 9VAC power adapter

Please note: Raspberry Pi Zero and sensors are not included

R679.90  Inc VAT
3.3V ADS1115 ADC Module for Raspberry Pi 3/2 / B I2C RPI ADS1115 ADC Analog to Digital Converter (ADS1115 ADC Module for RPi)

RPi-ADS1115-ADC Module is a precision analog-to-digital converter (ADC), one of them ADS1115 Is able to offer 16Bit sampling accuracy of the chip, using a very small sizeMSOP - 10Package.

Data passed I2C Compatible serial interface for transmission, owned 4 road I2C Address can be selected, work power only need3.3VYou can. Its main function is that it can be used to detect analog signals and convert them to digital signals.

You can put analog signals on joysticks or other analog sensors such as NTC, Temperature, dust sensors and other equipment through this RPi-ADS1115-ADC Module access raspberry faction, through the raspberry dispatch device to collect the analog signal.




65.0 mm 30.0 mm 18.0 mm

Operating voltage


Analog input voltage


Programmable data rate

8 sps To 860 sps

internal PGA

stand by


Sampling accuracy

16 Bit

I2c interface

Select the address by pin

Number of channels

4 Single-ended or 2
Differential input

Programmable Comparator (PGA)

2/3 ~ 16

internal NTC

R245.90  Inc VAT
GY-302 BH1750 BH1750FVI light intensity illumination module 3V-5V (light intensity sensor board)

For a wide range of brightness for 1 lux high precision measurement.
This sensor module is the most suitable to receive the ambient light data for adjusting LCD and other related projects. It is possible to detect wide range at High resolution.

The sensor is a calibrated digital light sensor that measures the intensity of the ambient light and stores it as a 16-bit number.


Type: GY - 302
Size: 13.9 mm X 18.5 mm
The original BH1750FVI ROHM chip
Power supply: 3-5 V
Data range: 0-65535
Sensor built-in and bitad converter
Direct digital output, bypassing the complicated calculation, omit calibration
Do not distinguish between ambient light
Close to the visual sensitivity of spectral characteristics

Package Includes:

1 x GY-302 Module
R39.90  Inc VAT
3V 650NM 5mW Red Dot Laser Head 6mm with Leads (Laser Diode)

This is a low cost Red Laser Diode in Copper Casing. The Mean Wave Length is 650nm and the Power Rating is 5mW.


Material: Copper plastic.
Laser shape: dot.
Outer diameter: 6 mm.
Wavelength: 650nm.
Working voltage: 3V.
Total length: 9cm/3.54inch
Wavelength: 650nm
Operating Current: less than 20 mA
Output Power: 5mW
Housing material: High quality Copper
Laser Shape: Dot
Outside diameter: 6mm
Dimensions: 6.5 x 18mm
Working temperature: -10 degree-40 degree
Lens and housing: Plastic
Wire connection: Red wire connect to Positive, Blue wire connect to Negative

What's in the box?

1 x 3V 650nm 5mW Red Dot Diode Laser Heads
R17.90  Inc VAT
Slider for micro:bit (Slider for micro:bit)

The MonkMakes Slider for micro:bit allows you to interact with your micro:bit by sliding a control left and right.

The board uses a 10kΩ linear variable resistor (pot) to output a voltage between 0 and 3V that can be measured in your micro:bit programs using one of the micro:bit connections as an analog input.

The kit includes the Slider for micro:bit itself plus a set of 5 alligator clip leads. 


What's in the box ?

1 x 3v Slider 
5 x Alligator clip leads 

(* micro:bit not included) 

Resources :

 - Instructions (PDF)
 - Data Sheet (PDF)
 - Lesson Plans (Google file share)

(* micro:bit and not included) 

R169.90  Inc VAT
RGB for micro:bit (RGB for micro:bit)

The MonkMakes RGB LED for micro:bit can be used to make any Colour by controlling the red green and blue levels. Handily mounted on a PCB it connects to the micro:bit using alligator clips.

Connect it up with alligator clips and then use the three outputs of your micro:bit to control the red, green and blue channels to mix up any color of light you want.


• Easy to connect
• Powered directly from micro:bit pins
• Useful for teaching color mixing.


Each LED channel has a 1kΩ series resistor to limit the current.

What's in the box ?

1 x RGB LED For micro:bit 

(*micro:bit not included )

R59.90  Inc VAT
Power for micro:bit (Power for micro:bit)

The MonkMakes Power for micro:bit opens up lots of ways of powering your micro:bit.

The board has a standard DC barrel jack that accepts between 4.5 and 12V and provides a regulated 3V output to the micro:bit via its JST battery connector.


What's in the box ?

1 x power for micro bit board (*Batteries and micro:bit not included)


Instructions (PDF)
Datasheet (PDF)

R149.90  Inc VAT
Monkmakes SSR (Monkmakes SSR)

The MonkMakes SSR is a low voltage solid state relay (no moving parts). This makes it super-easy to control loads of up to 2A at 16V from an Arduino, Raspberry Pi or other 3 or 5V microcontroller or single board computer.

This modern take on the electro-mechanical relay can even be used for low frequency PWM to control the power to its load.


This relay can be used to switch low voltage devices such as light bulbs, a motor, a small heating element or even a string of 12V LED lighting. The voltage needs to be kept under 16V, but the relay will automatically protect itself against too much current.

• Solid-sate relay up to 2 Amp Peak 1A continuous AC/DC
• Active LED indicator
• Resettable ‘polyfuse’ to protect against over-current
• Great for Arduino and Raspberry Pi
• Suitable for low frequency PWM

What's in the box ?

1 x Monkmakes SSR board



(* ONLY SSR -Solid State Relay - Included - all other products are for reference use only*)
R179.90  Inc VAT
CR2032 Button Battery Holder Case With On/Off Switch 3V single (CR2032 single enclosure)

Button/Coin compact design enclosure with On and Off Switch.
Perfect for soldering, perfect for robotic ,electronic, and restoration projects.
It can hold one CR2032 coin batteries.


Output: 3V
Color: Black
Model: For CR2032 x 1

What's in the box?

1 x CR2032 Battery enclosure (Battery not included)
R13.90  Inc VAT
LCD1602 RGB Module, 16x2 Characters LCD, RGB Backlight, 3.3V/5V, I2C Bus (WS LCD1602 RGB)
Features at a glance:
  • Incorporates character LCD panel LCD1602
  • Adjustable RGB backlight color, up to 16M (2563) backlight colors in theory
  • I2C control interface, only two signal pins are required, saving the IO resource
  • Compatible with 3.3V/5V operating voltage
  • Comes with development resources and manual (Raspberry Pi/Jetson Nano/Arduino examples)

Operating voltage3.3 ~ 5VLCD controllerAiP31068
Communication InterfaceI2CRGB driverPCA9633
Display Panelcharacter LCDDisplay size64.5 × 16.0mm
Characters16 × 2Dimensions87.0 × 32.0 × 13.0mm
Backlight colors16MOperating voltage-20 ~ 70℃


Wiki: LCD1602_RGB_Module

Adjustable RGB backlight color - up to 16M colors available
I2C control interface

for connecting with host boards like Raspberry Pi / Arduino...

VCC3.3V ~ 5V power input
SCLI2C clock pin
SDAI2C data pin

Hardware connection

connecting with Raspberry Pi Pico

connecting with Raspberry Pi

connecting with Arduino board

connecting with Jetson Nano Developer Kit

Outline dimensions:
What's in the box?

1 x RGB 1602 LCD
R189.90  Inc VAT
3V-5.5V HC-SR04P Ultrasonic Ranging Module (sensor ultrasonic 3V)

Ultrasonic Range finder has been very useful in many electronic project. It is low cost and teaches us the propagation of sound wave, learning about science while completing your project:) While it is popular, HC-SR04 ultrasonic sensor is 5V operated, so it is difficult to be used with 3.3V system like NodeMCU, Wemos, Raspberry pi, micro:bit or 3.3V Arduino board. No more waiting, we bring you the 3.0V to 5.5V Ultrasonic Ranging Module.

Using your echo-location abilities to detect tasty fish treats. Until genetic modifications catches up with our desires, we'll just have to make do with these handy 3V Ultrasonic Sonar Distance Sensor and a pair of flippers. These ubiquitous sensors are really common in robotics projects, but they can also be used for automation, interactive art and motion sensing. They work at about 2cm to 450cm(5V) or 400cm(3V) away, but we think 10cm-250cm will get you the best results.

These sensors are fast, fairly easy to use, and low cost. Unlike the more common HC-SR04 series, this model can be powered by 3V or 5V and the logic level will be the same. This makes this model great for use with just about any microcontroller or microcomputer. And, its HC-SR04 software compatible so just plug it in and it works the same! (Note the size is different from the HC-SR04 so you may need to make mounting adjustments)

Of course you can also use with 5V system such as Arduino UNO, Arduino Mini and Maker UNO.


  • Voltage: 3V - 5.5VDC
  • Current: 2.2mA
  • Measuring Range: 2cm - 450cm
  • Working Temperature: 0ºC to 70ºC
  • Compatible with HC-SR04 Ultrasonic Sonar Distance Sensor
  • Properly labelled pin assignment
  • Arduino and Raspberry Pi compatible

What's in the box?

1 x 3V - 5.5V Ultrasonic Ranging Module


Perfect for use with your 3.3V system like NodeMCU, Wemos, Raspberry pi and micro:bit
R36.90  Inc VAT
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