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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
16 Pins 2.54mm DIP Straight Plug Double Row Circular Hole IC Socket (16 pin IC socket)
Package includes:

1 x Circular hole 16 pin IC socket
R14.90  Inc VAT
Sound Detection Sensor LM393 Chip (sensor sound detection)

Can be used for Acoustic control light; give sound and light alarm working with Photosensitive sensor
Note:The Maximum induction distance is 0.5M

Features
 
  • Main Chip: LM393, Electret condenser microphone
  • Working Voltage: DC 4-6V
  • Signal output indication
  • Single channel signal output
  • The output effective signal is low level
  • When there is sound,output low level and the signal lights
Find help with this sensor at https://www.instructables.com/id/Sound-Sensor-Raspberry-Pi/
R15.90  Inc VAT
13.56MHz RC522 Chip IC Card Induction Module RFID Reader (13.56MHz RC522 RFID reader)

Description:

RC522 chip:
MF RC522 is applied to the highly integrated read and write 13.56MHz contactless communication card chip, NXP launched by the company for the "table" application of a low-voltage, low-cost, small size of the non-contact card chip to read and write, smart meters and portable handheld devices developed better choice. The MF RC522 use of advanced modulation and demodulation concept completely integrated in all types of 13.56MHz passive contactless communication methods and protocols. 14443A compatible transponder signals. The digital part of to handle the ISO14443A frames and error detection. In addition, support rapid CRYPTO1 encryption algorithm, terminology validation MIFARE products. MFRC522 support MIFARE series of high-speed non-contact communication, two-way data transmission rate up to 424kbit/s. As new members of the 13.56MHz reader card series of highly integrated chip family, MF RC522 MF RC500 MF RC530 There are a lot of similarities, but also have many of the characteristics and differences. Communication between it and the host SPI mode helps to reduce the connection narrow PCB board volume, reduce costs.

RFID module:
The MF522-AN module uses the the original Philips MFRC522 chip design circuit card reader, easy to use, low cost, and applies to the user equipment development, the reader and the development of advanced applications, the need for the user RF card terminal design/production. This module can be directly loaded into the various reader molds. Utilizes a voltage of 3.3V, through the SPI interface simple few lines directly with any user CPU motherboard connected communication can ensure that the module is stable and reliable work, distance card reader

Specifications:

Electrical parameters:
Operating current :13-26mA/DC 3.3V
Idle current :10-13mA/DC 3.3V
Sleep current: <80uA
Peak current: <30mA
Operating Frequency: 13.56MHz
Supported card types: mifare1 S50, mifare1 S70 MIFARE Ultralight, mifare Pro, MIFARE DESFire
Product physical characteristics: size: 40mm×60mm
Environmental Operating temperature: -20 to +80°C
Environmental Storage Temperature: -40 to +85°C
Relative humidity: relative humidity 5%-95%

Module interfaces SPI Parameter:
Data transfer rate: maximum 10Mbit/s

Package includes:

1 x RFID-RC522 module
1 x Standard S50 blank card (Non-contact IC card)
1 x S50 special-shaped card (key ring shape)
1 x Straight and 1 x angled male to male header(Soldering required)

Our setup guide
R44.90  Inc VAT
PLCC IC Chip Extractor Motherboard Circuit Board Component Puller (chip extractor tool)
Description:

Appropriate for extracting PLCC, PGA, PCLL and IC packed by DIP from SOCKET or PCB
With gripping your hand you can extract the IC vertically and perfectly
Great for extracting dense IC
Metal and shielded plastic to avoid static charge damage to IC components
Small hook for easy extracting IC and installation
Perfect for repair man, such as TV / DVD / PC technicians or IC workers

Specifications:

Dimension: extractor L100mm, small hook L4 to 9mm (when you grip the extractor the hook will shorten to 4mm)
Material: stainless steel and plastic

Package includes:

1 x IC chip extractor
R29.90  Inc VAT
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