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12V 1/2" Inlet Feed Water Solenoid Valve N/C (1/2 straight valve)
Description:

Have you ever wanted to control the flow of a liquid using your computer or microcontroller, but didn’t know how?
Well, here’s how: The 12V solenoid controlled fluid valve. Simply connect a fluid source to the fluid input then once the 12Vdc is applied the fluid will start to exit until the 12Vdc signal is removed.

If your signal is 5V , then you can use relay 5Vdc to control the 12Vdc from your microcontroller.

Specifications:

Voltage: 12V DC
Rated Power: 5W
Pressure: Max 8 Bar
Operation model: Normally closed
Port Size: 1/2''
Fluid temperature: 0-100
Usage: water and low viscosity fluids
Flow characteristics: 0.2Bar>1.5L/min 1Bar>7L/min 3Bar>12L/min 8Bar>20L/min;

What's in the box?:

1 x Water Solenoid Valve

Please note:

The actual valve size in the unit is smaller than the port size as you will find with most taps.

R249.90  Inc VAT
DC 12V 5N Push-Pull Open Frame Solenoid Electric Magnet Holding (solenoid push pull 5N12V)
Description:

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
DC 12V 90 Degree Electric Solenoid Valve 1/2 Inch Hose Magnetic Water Air Inlet Flow Switch (1/2 angle valve)
Description:

The 1/2" 2 way, 90 Degree, 2 port 12 V DC NPT Normally Closed Electric Solenoid Valve converts electrical signals to pneumatic functions as part of a larger system that allows users to interlock, isolate, and connect individual units of a larger operation.


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
Adafruit ADS1015 12-Bit ADC (ADS1015 12-Bit ADC)
Description:

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

R249.90  Inc VAT
3/4" 12V PP Normally Closed Type Solenoid water Valve (3/4 straight valve)
Description:

This is made of PP material and it is water proof, damp-proof, temperature resistance,insulation and good thermolysis.
Solenoid valves are efficient and durable providing a cost effective and reliable method of controlling water flow in a wide range of uses; from irrigation, where they are suitable for watering large areas such as sports grounds, municipal gardens, agricultural and small gardens, to applications in water-saving devices, water treatment and general industry.

Specifications:


  • Material: PP
  • Voltage: about 12V DC
  • Rated power: about 5W
  • Operation model: normally closed (N/C)
  • Pressure: about 0.02 - 0.8Mpa
  • Port size: about G3/4
  • Fluid temperature: about 0-100 degrees Celsius
  • Usage: water and low viscosity fluids
  • Flow characteristics:
  • about 0.02Mpa>2L/min;
  • about 0.10Mpa>10L/min;
  • about 0.30Mpa>16L/min;
  • about 0.80Mpa>28L/min

Package Includes:
1 x Solenoid valve

Please note:

The actual valve size in the unit is smaller than the port size as you will find with most taps.
R155.90  Inc VAT
12V Electronic Door Lock Access Control for Cabinet Drawer (solenoid cabinet lock)
Description:

This highly secure and easy to operate door lock, makes a perfect match for desk, cabinet, window or safe box.

Connecting it to a stable power supply will open the lock when energized.

Specifications:

  • Voltage: DC12V
  • Current Draw: DC12V/60mA
  • Fail Secure: Locked when power off
  • Extension length: 9.8mm close
  • Lock Size: 53 x 39 x 25(mm)
  • Bolt Dimension: 9.8 x 9(mm)
  • Weight: 150g


Features:

Highly secure and easy to operate 
Fit for desk, cabinet, window or safe box
 
Package Includes:

1 x Electric Cabinet Lock
R229.90  Inc VAT
10-bit ADC (SPI) MCP3008 - 8 Channel (10-bit ADC 8 Channel)
Description:

The Raspberry Pi is a great computer but there's just one thing that most hardware hackers will find missing: a few inputs for connecting analog sensors. This is where the MCP3008 chip comes in handy, with eight 10-bit channels accessible over SPI. Thanks to the Raspberry Pi's SPI interfaces and its two 'Chip Select' pins available off of the main GPIO connector, the problem is solved.

Features

  • 10-bit resolution
  • ± 1 LSB max DNL
  • ± 1 LSB max INL
  • 8 input channels
  • Analog inputs programmable as single-ended or pseudo-differential pairs
  • On-chip sample and hold
  • SPI serial interface (modes 0,0 and 1,1)
  • Single supply operation: 2.7V - 5.5V
  • 200 ksps max. sampling rate at VDD=5V
  • 75 ksps max. sampling rate at VDD=2.7V
  • Low power CMOS technology
  • 5 nA typical standby current, 2 µA max.
  • 500 µA max. active current at 5V
  • Industrial temp range: -40°C to 85°C

Applications

  • Sensor Interface
  • Process Control
  • Data Acquisition
  • Battery Operated Systems

How-To

The following sample assumes that you're running the latest official Raspbian distribution, that you're logged in as root and that you haven't yet customized Raspbian to use SPI from a Python script. By default, the kernel module managing SPI communications is not loaded on Raspbian, so let's ensure that the 'spidev' device is available.

[email protected]:/# lsmodModule                  Size  Used by  snd_bcm2835            12808  0  snd_pcm                74834  1 snd_bcm2835  snd_seq                52536  0  snd_timer              19698  2 snd_seq,snd_pcm  snd_seq_device          6300  1 snd_seq  snd                    52489  5 snd_seq_device,snd_timer,snd_seq,snd_pcm,snd_bcm2835  snd_page_alloc          4951  1 snd_pcm  

If 'spidev' device is not listed, we need to remove it from the kernel module 'blacklist' so that it's automatically loaded on the next boot:

[email protected]:/# nano /etc/modprobe.d/raspi-blacklist.conf  

Put a hash character in front of the 'blacklist spi-bcm2708' statement and save the file:

#blacklist spi-bcm2708  

then, manually load the SPI device:

[email protected]:/# modprobe spidev  

The command should just complete without returning an error. Validate the list of modules:

[email protected]:/# lsmod  Module                  Size  Used by  spi_bcm2708             4401  0  spidev                  5136  0  snd_bcm2835            12808  0  snd_pcm                74834  1 snd_bcm2835  snd_seq                52536  0  snd_timer              19698  2 snd_seq,snd_pcm  snd_seq_device          6300  1 snd_seq  snd                    52489  5 snd_seq_device,snd_timer,snd_seq,snd_pcm,snd_bcm2835  snd_page_alloc          4951  1 snd_pcm  

The 'spidev' device should now be available.

Next, install the 'git' package. It will be needed to install other packages from Github.

apt-get install git-core  

Install the 'python-dev' package. It will be needed to compile the 'py-spidev' package.

apt-get install python-dev  

Download and compile the 'py-spidev' package.

[email protected]:/# cd /home  [email protected]:/home# git clone git://github.com/doceme/py-spidev  [email protected]:/home# cd py-spidev/  [email protected]:/home# python setup.py install  

At this point, SPI is available from Python 2.7. Assuming that you have wired the MCP3008 to the Raspberry Pi's SPI bus using CE0 as the 'chip select' pin, you can read all eight analog inputs using the following Python script.

[email protected]:/home# nano adc.py  

Paste the script below in the editor and save it.

import spidev  import time    spi = spidev.SpiDev()  spi.open(0,0)    # read SPI data from MCP3008 chip, 8 possible adc's (0 thru 7)  def readadc(adcnum):          if ((adcnum > 7) or (adcnum < 0)):                  return -1          r = spi.xfer2([1,(8 adcnum)<<4,0])          adcout = ((r[1]&3) << 8)   r[2]          return adcoutwhile True:          for adcInput in range(0,8):                  print "ADC(", adcInput,")=", readadc(adcInput)          time.sleep(1)  

To execute the script

[email protected]:/home# python adc.py  

Sample output using a 10K Ohm trimpot connected to the ADC's pin 3 and all other pins pulled down to ground using a 10k resistor.

ADC( 0 )= 0  ADC( 1 )= 0  ADC( 2 )= 0  ADC( 3 )= 507  ADC( 4 )= 0  ADC( 5 )= 0  ADC( 6 )= 0  ADC( 7 )= 0  

Credits go to Jeremy for his work on the 'py-spidev' Python module which makes working with the MCP3008 straight forward. Alternatively, checkout wiringPi's SPI functions if you prefer using a 'C' API.

Related Tutorials & Samples

R45.90  Inc VAT
GX16-8 16mm 8 Pin Male & Female Wire Panel Connector Circular Aviation Socket Plug (Aviation 8pin connector)
Description:

A great way to connect multiple sensors to your Raspberry Pi or MCU (microcontroller) over distances in a near efficient way.

Specifications:

Name: Aviation Connector Plug
Item: GX16-8 Pin Male & Female Connector
Model: GX16-8
Rated current: 5A
Interface type: AC / DC
Material: Zinc alloy
Shape: Round
Diameter: 16mm
Pin Quantity: 8

Package Includes:

1 x GX16-8 Pin Male & Female Connector
Perfect for your sensor cables
R39.90  Inc VAT
12V Alarm Red security Flashing Light (red flash light alarm)
Description:

Small red security alarm signal emergency warning strobe light excluding the mounting bracket. It can be used for anti-burglary alarm signal indication, entrance and construction site warning lights and other similar applications.

Specification:

Rated voltage: 12V DC
Rated current: 120mA
Strobe rate: 90s / minute
Diameter: 7.2cm
Height: 4cm
Lamp cover color: red

Features:

Led strobe flashing light
Suitable for security, status etc...
Also ideal for construction site as a warning light

Note:

This product only has a flashing light, no sound.

Package includes:

1 x Alarm Signal Lamp
2 x Bases
4 x Screws
R209.90  Inc VAT
PJ-392 3-Pin 3.5mm Stereo Headphone Audio Video Jack Socket Plug With Nut (headphone socket)
Description:

Jack plugs and sockets are widely found in audio and audio-video applications and are most commonly used for analogue audio signals like the 3.5mm jack found on your earphones. With this socket you can now add this funtionality to your project. 

Specifications:

Model: PJ-392
Size(LxWxH): Approx. 22.5mmx 8mm x 8mm/ 0.89x3.15x3.15"


Package Includes:

1 x Stereo Headphone Audio Video Jack Socket

R9.90  Inc VAT
DC 110db 12V Compact Siren (12V Red Siren)
Description:

This is a 110 dB alarming horn with a sound alarming system to avoid breaking in burglars or thieves and build a protection for home and valuables.
Made of premium plastic and metal materials for strong strength and long durability. Loud enough sound to frighten away those who are going to steal or do something bad. 

Features:

  • A true high quality, Heavy Duty, All Metal Air Raid Siren Horn.
  • 3 inch Diameter and features a rugged construction, easy mounting.
  • Applications Vehicle: Fits on Any 12 Volt Vehicle, such as Car, Truck, SUV, Motorcycle, Yacht, Boat,Vehicle, Bus,etc.
  • All metal body, durable use.

Specifications:
  • Voltage: 12V
  • Color: Red
  • Size: 77mm x 85mm x 75mm
  • Material: Metal
  • Outside use: Yes
  • Wattage: 30W
  • Sound Level: 110dB


Package includes:

1 x Siren Horn
Great for your DIY alarm project
R279.90  Inc VAT
Slip Ring with Flange - 22mm Diameter-6 Wires-Max 240V 2A (slip ring 22mm 6wire)

DESCRIPTION

With a slip ring assembly, your electronics can now twist and turn safely. Add wheel encoders, 360 degree sensors, rotating LEDs, rotors and more! We've seen a lot of people DIY slip ring's out of desperation but no longer, simply pick up one of these to solve any rotation needs you have.

Inside the plastic tube is a gold plated slip ring for 6 wires. There are six color coded wire sets made of 26 AWG and no matter how you twist the assembly, they will remain in continuity. Each of the wire sets can carry up to 2A at up to 240VAC or 240VDC. There's a 44mm (1.7") diameter flange with mounting holes to make it easy to attach or you can cut it off with a hacksaw and drill/machine as you wish it seems to just be ABS plastic. Rated to rotate up to 300 RPM (but you can probably go faster if you don't mind a reduced life and/or noise).

Note: Wire colors may vary.

TECHNICAL DETAILS

Rated voltage: 240VAC/240VDC
Rated current: 2 Amp
6 x 6" long 26 AWG wires

What's in the box

1 x Slip Ring with Flange - 22mm Diameter-6 Wires

R299.00  Inc VAT
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