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This module can simultaneously drive two DC motors or a 4-wire 2-phase stepper motor
R34.90  Inc VAT
UBEC's (Universal Battery Eliminator Circuit's) are simply DC to DC step down voltage regulators! This UBEC is perfect for the Raspberry Pi, as it's able to take high voltages (5.5V up to 26V), and outputs a consistent safe voltage of 5V at up to 3A nominal or 5A max!
R69.90  Inc VAT
The L293D Dual H-Bridge IC is able to run four solenoids, two DC motors or one bi-polar or uni-polar stepper motor, with up to 600mA per channel!
R14.90  Inc VAT
R39.90  Inc VAT
40 PIN IDC SOCKET CABLE MOUNT HEADER (40-PIN IDC SOCKET)

40-PIN IDC SOCKET CABLE MOUNT

R11.90  Inc VAT
Eight channel 5V DC Relay Module (8 channel relay)

Description:

This is an eight channel 5V DC relay module with active low. It can be controlled by variety of microcontrollers such as Arduino, Raspberry Pi, PIC, DSP, AVR or ARM etc.

  • Has the ability to control eight separate appliances or pieces of equipment
  • Eight on-board optoisolators enable direct interfacing to microcontrollers
  • Eight red LED status lights on-board show relay activity
  • Widely used in PLC control or smart home control
  • 4 x M3 mounting holes for easy fixing via standoffs

Specifications:

  • 15-20mA drive current needed per channel
  • Relay coil maximum operating voltage: 5V
  • Relay coil maximum current: 89.3mA
  • Relay contact maximum: AC250V at 10A or DC30V at 10A
  • No. of relays/channels: 8
  • Item size: 134 x 55 x 20mm
  • Item weight: 116g

Contents:

  • 1 x 8 Channel Relay Module

Resources:

 

Warning
Exercise proper caution when connecting mains driven equipment or appliances to relay module as lethal current will be present.

R129.90  Inc VAT
Four channel 5V DC Relay Module (4 channel relay)

Description:

Use this relay board with your Arduino, Raspberry Pi or your custom micro-controller projects!

Specifications:

  • Each Relay has LED indication when ON
  • SPDT Relays with terminal block outputs.
  • Relay Coil voltage: 5 VDC
  • Power Requirement: 5 VDC
  • 10A 250V AC / 10A 30V DC

Contents:

  • 1 x Four channel 5V DC Relay Module

Resources:


R75.90  Inc VAT
Two Channel 5V DC Relay Module (2 channel relay)

Description:

This is a two channel 5V DC relay module with active low. It can be controlled by variety of microcontrollers such as Arduino, Raspberry Pi, PIC, DSP, AVR or ARM etc.

  • Has the ability to control two separate appliances or pieces of equipment
  • Two on-board optoisolators enable direct interfacing to microcontrollers.
  • Two red LED status lights on-board show relay activity.
  • Widely used in PLC control or smart home control
  • 4 x M3 mounting holes for easy fixing via standoffs

Specifications:

  • 15-20mA drive current needed per channel
  • Relay coil maximum operating voltage: 5V
  • Relay coil maximum current: 89.3mA
  • Relay contact maximum:  AC250V at 10A or DC30V at 10A
  • No. of relays/channels: 2
  • Item size: 57 x 55 x 20mm
  • Item weight: 57g

Contents:

  • 1 x 2 Channel Relay Module

Resources:

 

Warning
Exercise proper caution when connecting mains driven equipment or appliances to relay module as lethal current will be present.

R37.90  Inc VAT
DC 4.5-30V 3 Wire LED Voltmeter Digital Display Panel Volt Meter (dc 3 wire volt meter)
Features:
 
Display Color: Red
The black line connects to the negative electrode, red line connects to positive pole of power supply, white line connects to positive pole of tested power supply
Material: Plastic Shell
Display Digit: 3
Measuring Range: DC 4.5-30V
Working voltage: 4.5-30V
Overall Dimension: Approx 28mm x 47mm x 21mm
 
Package Includes:
 
1 x Digital LED Display Voltmeter
R32.90  Inc VAT
Stepper Motor with ULN2003 Driver (DC 5V) (Stepper and pcb driver)
- High quality stepper motor with ULN2003 driver
- Suitable for microcontroller development
- Voltage: DC 5V
- Diameter: 28mm
- Step Angle: 5.625 x 1/64
- Reduction Ratio: 1/64
 
Dimensions: 1.38 in x 1.18 in x 0.39 in (3.5 cm x 3.0 cm x 1.0 cm)
Weight: 1.45 oz (41 g)

How to control a
ULN2003 stepper motor with Raspberry Pi

The maximum speed for a 28byj-48 stepper motor is roughly 10-15 rpm at 5 V.

the 28BYJ-48 motor runs in full step mode, each step corresponds to a rotation of 11.25°. That means there are 32 steps per revolution (360°/11.25° = 32). In addition, the motor has a 1/64 reduction gear set.

The power consumption of the motor is around 240mA.


The ULN2003 is one of the most common motor driver ICs, consisting of an array of 7 Darlington transistor pairs, each pair is capable of driving loads of up to 500mA and 50V. Four out of seven pairs are used on this board.


The board has four LEDs that show activity on the four control input lines (to indicate stepping state). They provide a nice visual when stepping.

The board also comes with an ON/OFF jumper to isolate power to the stepper Motor.




R59.90  Inc VAT
L9110S H Bridge Stepper Motor Dual DC Driver Controller Module (L9110S small H Bridge)

Description:

There are two L9110S motor controller chips onboard
This module can simultaneously drive two DC motors or a 4-wire 2-phase stepper motor

Feature:

Work under low static current
Power supply voltage: DC 2.5V - 12V
Each channel has 800mA continuous current output
Low saturation pressure drop
TTL / CMOS output level compatible, can be connected directly to the CPU
Output built-in clamping diode, apply to the perceptual load
Control and drive integrate in IC
Pin high pressure protection function
Working temperature: 0°C - 80°C
Size: 29 x 21mm(L x W)

Circuit diagram:

 


Package includes:

  1x L9110S stepper motor driver

Robot control with Python

This module can simultaneously drive two DC motors or a 4-wire 2-phase stepper motor
R34.90  Inc VAT
Hobbywing 5V 3A UBEC Step-Down Converter (Hobbywing power converter)

UBEC's (Universal Battery Eliminator Circuit's) are simply DC to DC step down voltage regulators! This UBEC is perfect for the Raspberry Pi, as it's able to take high voltages (5.5V up to 26V), and outputs a consistent safe voltage of 5V at up to 3A nominal or 5A max! The Hobbywing 5V 3A UBEC is a switch-mode type, which results in it being much more efficient than linear type UBEC's (so your batteries will last longer!)

UBEC's are perfect for applications where you plan to use the Raspberry Pi in a circuit with high voltages such as robots where you'll be driving motors!

Due to the voltage drop caused by the Raspberry Pi, it is recommended to input a minimum of 6.5V to receive a stable 5V output. Anything lower than 6.5V will result in a low voltage warning on the Pi.

Please Note. The Hobbywing UBEC can be set to output either 5V or 6V using an onboard jumper select! Please DOUBLE CHECK your output voltage is correct before connecting your microcontroller or circuit! 

Features

  • Designed with an advanced switch mode DC-DC regulator IC.
  • Battery polarity reversal protection.
  • A metal shield covers almost all the electronic components, and a specially made filter is attached to the output wires to significantly reduce the electromagnetic interference.
  • The working status is shown by an indicator (LED), which lights when the output is in normal range.
  • Output Voltage: [email protected] or [email protected] (Changeable with an output-voltage select jumper)
  • Continuous output current: 3 Amps
  • Maximum output current: 5 Amps
  • Input: 5.5V - 26V (2 - 6 cells lithium battery pack or 5 - 18 cells NiMH /NiCd battery)
  • Size: 43mm*17mm*7mm (L*W*H)
  • Weight: 11g

Check out our tutorial here: https://www.modmypi.com/blog/using-a-ubec-with-a-raspberry-pi

UBEC's (Universal Battery Eliminator Circuit's) are simply DC to DC step down voltage regulators! This UBEC is perfect for the Raspberry Pi, as it's able to take high voltages (5.5V up to 26V), and outputs a consistent safe voltage of 5V at up to 3A nominal or 5A max!
R69.90  Inc VAT
DC 9V 1A Battery Button Power Cable Tieline For Arduino (9VDC Batt arduino power clip)

Description:

This is a DC 9V Battery Button Power Cable Tieline For Arduino

Barrel adapter is negative on the outside

Package includes:

1 x DC 9V Battery Button Power Cable 
R9.90  Inc VAT
Adafruit TB6612 1.2A DC/Stepper Motor Driver Breakout Board (Adaf TB6612 stepper driver)

Fire four solenoids, spin two DC motors or step one bi-polar or uni-polar stepper with 1.2A per channel (3A peak) using the TB6612.

 We really like these dual H-bridges, so if you want to control motors without a shield or HAT these are easy to include on any solderless breadboard or perma-proto.

We solder on TB6612 onto a breakout board for you here, with a polarity protection FET on the motor voltage input and a pullup on the "standby" enable pin. Each breakout chip contains two full H-bridges (four half H-bridges). That means you can drive four solenoids, two DC motors bi-directionally, or one stepper motor. Just make sure they're good for 1.2 Amp or less of current, since that's the limit of this chip. They do handle a peak of 3A but that's just for a short amount of time. What we like most about this particular driver is that it comes with built in kick-back diodes internally so you dont have to worry about the inductive kick damaging your project or driver!

There's two digital inputs per H-bridge (one for each half of the bridge) as well as a PWM input per driver so you can control motor speed. Runs at 2.7V-5V logic. The motor voltage is separate from the logic voltage. Good for motor voltages from 4.5V up to 13.5V! This wont work well for 3V motors.

Comes as one assembled and tested breakout plus a small strip of header. You'll need to do some light soldering to attach the header onto the breakout PCB. Arduino, motors, and power supply not included. Check out the handy tutorial on assembly and wiring!

R119.90  Inc VAT
ULN2803A: 8 Channel Darlington IC - Solenoid, DC & Stepper Motor Driver (Darlington stepper driver IC)
Bring in some muscle to your output pins with 8 mighty Darlingtons! This DIP chip contains 8 drivers that can sink 500mA from a 50V supply and has kickback diodes included inside for driving coils. This will let your little microcontroller or microcomputer power solenoids, DC motors (in one direction) and unipolar stepper motors. The inputs can be driven by 3.3V or 5V logic and the IC fits nicely in any breadboard or perfboard.
 
Please note, this is an 'open collector' driver - it can only be used to connect the load to ground and there will be a 1 Volt (or more) 'drop' across the internal transistors.
 
This is a genuine Toshiba part, not a cheap replica! 
 
The ULN2803: 8 Channel Darlington IC (Solenoid/Unipolar Stepper Driver) Features:
  • The ULN2803APG / AFWG Series are high−voltage,high−current darlington drivers comprised of eight NPN darlington pairs.
  • All units feature integral clamp diodes for switching inductive loads.
  • Applications include relays, hammer, solenoid, unipolar steppers, lamp and display (LED) drivers etc.
  • Output current (single output): 500 mA (max)
  • High sustaining voltage output: 50 V (min)
  • Output clamp diodes
  • Inputs compatible with various types of logic.
  • Package Type−APG : DIP−18pin

Downloads

ULN2803 Data Sheet

Tutorials

How to Control a Stepper Motor using your Raspberry Pi & the ULN2803 Driver Chip

R28.90  Inc VAT
L293D Dual H-Bridge IC - Solenoid, DC & Stepper Motor Driver (L293D IC H-bridge)
The L293DNE Dual H-Bridge IC is able to run four solenoids, two DC motors or one bi-polar or uni-polar stepper motor, with up to 600mA per channel!
 
Each chip contains two full H-bridges (four half H-bridges) which means you can drive four solenoids, two DC motors bi-directionally, or one stepper motor. Just make sure they're good for under 600 mA since that's the limit of this chip. They do handle a peak of 1.2A but that's just for a short amount of time. What we like most about this particular driver is that it comes with built in kick-back diodes internally so you dont have to worry about the inductive kick damaging your project or driver
 
 
The L293D Dual H-Bridge IC - Stepper & DC Motor Driver Features:
  • Dual H-Bridges - run four solenoids, two DC motors, or one uni-polar or bi-polar stepper motor
  • Output Current: 600mA per channel (1.2A Max)
  • No of Channels: 4
  • Input: 5V Logic
  • Supply Voltage Range: 4.5V to 36V
  • No. of Pins: 16
  • Operating Temperature Range: 0°C to +70°C

Downloads

L293DNE Data Sheet

Tutorials

Controlling a Stepper Motor with the L293D

Raspberry Pi: Controlling a DC Motor

Arduino: Stepper Motors

Arduino: DC Motor Reversing

The L293D Dual H-Bridge IC is able to run four solenoids, two DC motors or one bi-polar or uni-polar stepper motor, with up to 600mA per channel!
R14.90  Inc VAT
DC 12V 5N Push-Pull Open Frame Solenoid Electric Magnet Holding (solenoid push pull 5N12V)
This solenoid electric magnet is suitable for vending machines, office facilities, transport equipment, appliances and much more.
It can be fixed and connect load easily, heat up stablely to prolong life of product and ensure good performance.

Specification :

Input Voltage : 12V DC
Holding Force : 5N
Operating Temperature : -5 - 40℃ non-condensing
Operating Humidity : relative humidity 45%-85% non-condensing
Saving Temperature : -45 - 75℃ non-condensing
Saving Humidity : relative humidity 0%-95% non-condensing

Stroke : 10mm
Fram Size : 30(L)x13(W)x15(H)mm

Package Includes :

1 x DC 12V 0.4N Push-Pull Open Frame Solenoid Electric Magnet
R249.90  Inc VAT
12V DC 40mm Cooling Fan 40x40x10mm (12V fan 40x40x10)
Voltage: DC 12V
Current: 0.08A
Size: 40mm x 40mm x 10mm
Color: Black
 
Package Includes:
 
1 x 12V DC Brushless 40mm fan
R39.90  Inc VAT
5V DC Fan 30x30x7mm (5V DC Fan 30x30x7mm)
 Description:

  •     Dimensions: 30x30x7mm
  •     Connector:  Dupont 2Pin
  •     Rated Voltage: DC 5V
  •     Rated Current: 0.1±10%Amp
  •     Rated Speed: 11000±10%RPM
  •     Air flow:3.25CFM
  •     Noise: 26±10%dBA
  •     Bearing Type: Sleeve
  •     Cable Lenght: 13cm
  •     Weight: 7g


Package Includes:
1 x Cooling Fan
R39.90  Inc VAT
DC 5V Waterproof Ultrasonic Module Distance Measuring Transducer Sensor (waterproof ultrasonic)
Specifications:

Operating voltage: DC 5V
Total current work: 40mA
Acoustic emission frequency: 40khz
Maximumdistance: 4.5m
Blind: 25cm

Wiring:
+ 5V (positive power supply)
Trig (control side) RX
Echo (the receiver) TX
GND (negative)

Resolution: about 0.5cm
Angle: 70 degrees
Working temperature: -10 ~ 70 ℃
Storage temperature: -20 ~ 80 ℃

Product Features:

- small size, easy to use;
- low voltage, low power consumption;
- high accuracy;
- strong anti-jamming;
- integrated with wire enclosed waterproof probe, suitable for wet, harsh measuring conditions.

Application:

1 Horizontal distance;
2 obstacle avoidance, automatic control;
3 traffic control;
4 security, industrial control;
5 artificial intelligence, and research

Basic working principle:
(1) using IO port TRIG trigger location, to the high level signal of at least 10us;
(2) module automatically sends 8 40KHz pulse, automatic detecting whether a signal returns;
(3) on signal return, a high level is output through the IO port ECHO, the time duration of the high level is ultrasonic from launch to return. The test distance = (high level time * speed of sound (340M/S)) /2;

Usage

Package Includes:

1 x DC 5V Waterproof Ultrasonic Module Distance Measuring Transducer Sensor
R169.90  Inc VAT
DC 12V 90 Degree Electric Solenoid Valve 1/2 Inch Hose Magnetic Water Air Inlet Flow Switch (1/2 angle valve)
Description:
DC 12V Electric Solenoid Valve 1/2 Inch Hose Magnetic Water Air Inlet Flow Switch

Specification:
MaterialMetal + Plastic
ColorAs per picture
VoltageDC12V
Rated Power5W
Pressure0.02- 0.8Mpa
Interface Modes1/2'' Hose
Working Time5 hours at once (Max)
Insulation ClassE
Fluid Temperature0-90°C
SizeL*W*H/75*60*45mm/2.95*2.36*1.77''
Inner diameter14mm/0.55''
External diameter of thread20mm/0.78'' 
 
Features:
Durable and practical.
Made of high quality plastic and metal for long life.
Very convenient to use, open or close when power on or off.
 
Package Includes:
1 x Electric Solenoid Valve

Please note:

The actual valve size in the unit is smaller than the port size as you will find with most taps.
R139.90  Inc VAT
Switched Battery Box 4xAA (6V) (switch batt box 4xAA)

This battery box is designed for use as a nice switchable, portable power pack, and fits any four 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. It even includes a very useful miniature on-off slide switch which is very handy for wiring to projects that don't have a switch! Connection is via two flexible stranded red (positive) & black (negative) 26AWG wire leads, which are approximately 150mm in length.

The four batteries are held in series, for a nominal output of 6V DC (6.4V when fresh, 4V when dead), and 4.8V DC for rechargeables (5.2V when fully charged, 4.4V when discharged). Using rechargeables will make this work nicely with nearly any 5V project, with alkalines you may want to put a 1N4001 in series to drop the voltage from 6V down to 5.3V.
 
Specification
  • Battery Cell Size AA
  • Number of Cells 4
  • Body Material ABS Resin
  • Height 19.0 mm, Length 69.0 mm, Width 64.5 mm
  • Terminal Type Wire Lead
  • Type Battery Box
  • Weight 0.03300 kg
R41.90  Inc VAT
Adafruit ADS1015 12-Bit ADC (ADS1015 12-Bit ADC)

The Raspberry Pi does not feature an Analog-to-Digital Converter (ADC), so if you want to measure analogue singals, you'll need this 12-Bit ADC!

The Adafruit 4-Channel I2C 12-Bit ADC is a high-precision ADC and features the ADS1015 chip, which provides 12-bit precision at 3300 samples/second over I2C. The chip can be configured as 4 single-ended input channels, or two differential channels. As a nice bonus, it even includes a programmable gain amplifier,with up to x16, to help boost smaller single/differential signals to the full range. We like this ADC because it can run from 2V to 5V power/logic, can measure a large range of signals and its super easy to use. It is a great general purpose 12 bit converter. 

The chip's fairly small so it comes on a breakout board with ferrites to keep the AVDD and AGND quiet and interfacing is done via I2C. The address can be changed to one of four options (see the datasheet table 5 in downloads below) so you can have up to 4 ADS1015's connected on a single 2-wire I2C bus for 16 single ended inputs. 
 
To get you started, we have example code for the Raspberry Pi - Simply connect GND to ground, VDD to your logic power supply, and SCL/SDA to your microcontroller's I2C port and run the example code to start reading data.
 
The Adafruit 4-Channel I2C 12-Bit ADC Features:
  • Wide Supply Range: 2.0V to 5.5V
  • Low Current Consumption: Continuous Mode: Only 150µA Single-Shot Mode: Auto Shut-Down
  • Programmable Data Rate: 128SPS to 3.3kSPS
  • Internal Low-Drift Voltage Reference
  • Internal Oscillator
  • Internal PGA
  • I2C Interface: Pin-Selectable Addresses
  • Can run from 2V to 5V power/logic
  • Measures a large range of signals and is super easy to use.
  • 12-bit precision at 3300 samples/second over I2C.
  • Configurable as 4 single-ended input channels, or two differential channels.
  • Includes a programmable gain amplifier, up to x16, to help boost up smaller single/differential signals to the full range.
  • Breakout Board equipped with ferrites to keep the AVDD and AGND quiet

Tutorials

Four Channel ADC Breakout

Example Code for the Raspberry Pi

R229.90  Inc VAT
5.5 x 2.1mm Pair Male Female 12V DC Power Plug Jack Adapter Connector for CCTV (male female cctv connector)
Description:
Simple & Professional appearance for power cabling
Easier for camera installation, save time and more securer cable connection
5.5mm x 2.1mm Female power plug connector
Clearly marked positive and negative to avoid reversal.


Package Includes:

1 x Pair Male Female 12V DC Power Plug Jack Adapter Connector
R25.90  Inc VAT
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