It consists of seven npn darlington pairs that features highvoltage outputs with commoncathode clamp diode for switching. Microcontroller interfacing to relays using uln2003 relay. Edgefx provides a video tutorial on relay driver uln2003 circuit ic pin description and used to drive relay switch on and off. The elecrow uln2003 stepper motor driver board is using the uln2003 darlington arrays to drive the 4phase 5wire stepper motor 5 12 v. Applications include relay drivers,hammer drivers, lampdrivers,display driversled gas discharge,linedrivers,andlogicbuffers.
I am using the uln2003 driver to spin 28byj48 stepper motor. Uln2003lv 7channel relay and inductive load sink driver. Uln2002a uln2003a uln2004a january 2017 document number. Ensure that battery power has been disconnected before installing or removing the relay driver. Here we will explore using the versatile uln2003a darlington transistor array with a typical microcontroller such as arduino. Free tools for electronics designers, eagle libraries. The diode d1 is to prevent kickback when deactivating the relay. Complete technical details can be found at the uln2003 datasheet given at the end of this page.
Uln200x, ulq200x highvoltage, highcurrent darlington. Jun 09, 2017 some of the other applications of uln2003 include logic buffers, lamp drivers, line drivers, led display, motor driver circuits etc. The uln2003 is a monolithic high voltage and high current. The pcb provides 4 inputs for connection to your microcontroller, power supply connection for the stepper motor voltage, and onoff jumper, a direct connect stepper motor header. For the uln2003 to sink 200 ma through the output transistors it needs at least 2. Seven darlington arrays, uln2003 datasheet, uln2003 circuit, uln2003 data sheet.
Uln2003 stepper driver board and 12v 28byj48 motor test. We can use seven relays with relay driver circuit using uln2003 and the relay driver circuit using uln2803 enables to use eight relays. I am wondering if this driver allows me to disconnect the motor from the 9v while its not being used. These versatile devices are useful for driving a wide range of loads including solenoids, relay dc motors, led display filament lamps, thermal. Relay driver circuit using ic uln2003 and its working. Uln2003a ic is one of the most commonly used motor driver ic. Uln2003a, ulq2003a high voltage, high current darlington transistor arrays the seven npn darlington connected transistors in these arrays are well suited for driving lamps, relays, or printer hammers in a variety of industrial and consumer applications. How to drive relay using uln2003 electrical engineering. Uln2003 high voltage and current darlington transistor array. Relay driver circuit using ic uln2003 with applications. Its easy to use arduino or other development platform to drive the stepper motor by this diver board.
Technically this diode is built into the uln2003, but it never hurts to have an extra. Relay driver circuit using uln2003 and its applications. Uln2003 is a relay driver ic consisting of a darlington array. These devices are capable of driving a wide range of loads including solenoids, relays, dc. The relay driver circuit using uln2003 is given below. In this circuit diagram, the pic microcontroller is providing a signal to 4 relays through relay driver ic uln2003. Applications include relay drivers, hammer drivers, lamp drivers, display drivers led and gas discharge, line drivers, and logic buffers. I am using this stepper for only 3 seconds every 2 minutes. Their high breakdown voltage and internal suppression diodes insure freedom from problems.
The uln2003a is a highvoltage, highcurrent darlington transistor array consisting of seven npn darlington pairs that feature highvoltage outputs with commoncathode clamp diodes for switching inductive loads. The uln2002a is designed specifically for use with 14v to 25v pmos devices. Coil resistance is usually provided in the datasheet of a relay which can be used. The darlington pairs can be paralleled for higher current capability. Diodes incorporated uln2002a uln2003a uln2004a high voltage. I am using 9v to drive this motor and it gets very very hot after 5 minutes. Uln2003lv 7channel relay and inductive load sink driver 1 features 3 description the uln2003lv is a lowvoltage and low power 1 7channel high current sink drivers upgrade oftis popular uln2003 family 7channel supports up to 8v ouput pullup voltage darlington transistor array. Ltd 1 high voltage and high current darlington transistor array description the uln2003 is a monolithic high voltage and high current darlington transistor arrays.
It is difficult to use a number of relays with transistors, so, relay driver ic uln2003a can be used for availing more relays. The relay driver uln2003 ic is a high voltage and current darlington array ic, it comprises of 7open collector darlington pairs with common emitters. Uln2003 pdf, uln2003 description, uln2003 datasheets, uln2003. For 100v otherwise interchangeable versions of the ulx2003a devices, see the slrs023 data sheet for the sn75468 and sn75469 devices. Arduino out to the uln2003, and out of uln2003 to the 12v of leds. Tpic2701, uln2001, uln2002, uln2004, l293d, motor driver shield. Relaydriver applications 2 applications relay drivers stepper and dc brushed motor drivers lamp drivers display drivers led and gas discharge line drivers logic buffers 3 description the ulx200xa devices are highvoltage, highcurrent darlington transistor arrays. The circuit below takes into account the open collector operation of the uln2003.
Input pins placed opposite to output pins to simplify layout. If you want to know more about relay driver circuit uln2003, relay working and relay interfacing with arduino check these articles. Relay driver circuit using ic uln2003 with applications elprocus. Uln2003 ic is one of the most commonly used motor driver ic. Uln2001 each driver uln2002 each driver uln2003 each driver uln2004 each driver pin configuration uln2001, uln2002, uln2003, uln2004 417 docid5279 rev 12.
It is made up of seven open collector darlington pairs with common emitter. Sep 03, 2012 edgefx provides a video tutorial on relay driver uln2003 circuit ic pin description and used to drive relay switch on and off. Uln2003 pdf, uln2003 description, uln2003 datasheets. Uln2003 datasheet, uln2003 datasheets, uln2003 pdf, uln2003 circuit. Uln2003 relay driver datasheet, cross reference, circuit and application notes in pdf format. Elecrow uln2003 stepper motor driver board robotshop. This ic belongs to the family of uln200x ics and various types of this family interface to various. Relay driver uln2003 relay driver ic electrical projects. Uln2001, uln2002 uln2003, uln2004 stmicroelectronics. General safety information read all the instructions and cautions in the manual before starting the installation. Uln2003a darlington transistor array circuit examples.
Arduino library for 28byj48 stepper motor and uln2003 driver. My concern was the amount of heat that is generated by the uln2003. The collectorcurrent rating of a single darlington pair. This ic comes in handy when we need to drive high current loads. A uln2003 installed in a breakout board to be used as a unipolar stepper motor driver with a 28byj stepper motor on the left. Stmicroelectronics seven darlington arrays,alldatasheet, datasheet, datasheet search site for.
Apr 25, 2015 the relay driver circuit using uln2003 is given below. To test the full strength and speed of the stepper motor connect a separate 12vdc power supply to the vcc and gnd on the uln2003 stepper driver board. There are no user serviceable parts in the relay driver. The darlington pairs may be parrlleled for higher current capability. This ic is commonly used to drive relay modules, motors, high current. For 100v otherwise interchangeable versions of the uln2003a and uln2004a, see the sn75468 and sn75469, respectively. Revised june 2004 2 post office box 655303 dallas, texas 75265 descriptionordering information continued the uln2001a is a generalpurpose array and can be used with ttl and cmos technologies. Uln2003a, ulq2003a high voltage, high current darlington. The uln2002a, uln2003a, uln2003ai, uln2004a, ulq2003a.
A pair of darlington is an arrangement of two bipolar transistors. Make sure the gnd is common to both the arduino and the uln2003 driver board. Uln2003 application note uln2003 ac uln2003apg ic connection uln2004apg uln2003 relay driver pdf free download uln2003 relay driver application notes test board uln2003 uln2003 relay driver relay driver ic uln2003. Uln2003 datasheet, uln2003 pdf, uln2003 data sheet, uln2003 manual, uln2003 pdf, uln2003, datenblatt, electronics uln2003, alldatasheet, free, datasheet, datasheets. Microcontroller interfacing to relays using uln2003, in this article, you will learn how to interface microcontroller to relays using uln2003 relay driver circuit. The uln2003 is a monolithic ic consists of seven npn darlington transistor pairs with high voltage and current capability. Uln2003 stepper motor driver board is to use the uln2003 darlington arrays to drive the 4phase 5wire stepper motor 5v12v. These versatile devices are useful for driving a wide range of loads including solenoids, relays. Typical usage of the uln2003a is in driver circuits for relays, lamp and led displays, stepper motors, logic buffers and line drivers. Stmicroelectronics, alldatasheet, datasheet, datasheet search site for electronic. Its easy to use arduino or other development platforms to drive the stepper motor by this driver board. It is commonly used for applications such as relay drivers, motor, display drivers, led lamp drivers, logic buffers, line drivers, hammer drivers and other high voltage current applications.