12 Jan 2021

Motor Relay Board Hookup Guide. As gear like engines and relays need high present, microcontrollers cannot drive them.

Motor Relay Board Hookup Guide. As gear like engines and relays need high present, microcontrollers cannot drive them.

so that you can drive them, we truly need unique drivers that are current. Motor relay board comes to the photo due to these needs. Engine relay board drives engines and relays by providing adequate present. It could drive one relay and four DC engines or one stepper motor at a time. The engine relay board eases the job of interfacing outside engine and AC products aided by the ATmega32 microcontroller. This has ULN2003 motorists for high present applications like motor driving and relay driving circuits for AC unit interfacing.

You will find three sections that are main an engine relay board.

Relay Motorist

Utilising the supplied relay circuit, 230V products may be controlled. This part is useful for automating the off and on.

Engine Driver

The DC engine may be managed by using this area, there clearly was 4 driver that is ULN2003 lines for driving engines and every provides adequate present to manage the DC engine.

Exterior Interfaces

* Terminal block (3pin) –for linking relay IN and OUT * Terminal block(7pin) – for linking 4 lines of engine, 1 for energy and 2 pins for ground

Linking the Board

* switch on the board utilizing SW1, energy LED will glow. * Connect the port connector into the standard slot. * Shunt the jumpers in J4. * Use jumper caps to pick port pins. First four pins (0, 1, 2&3) are relay selectors. The relay may be linked to 4 pins. * Use port pins 4,5,6&7 for engines in the region of engine D, C, B&A. * Set the input slot pin correspondingly to make ON/OFF the relay/motor.


There was a header that is alternate for accessing specific pins.

The Jumper description can be below for J4.

The motor and relay inputs may be straight accessed by the header J5.

Terminal Obstructs

Terminal obstructs are employed for linking engine, outside supply, and relay managed equipment.

There are three terminal obstructs. A person is when it comes to engine which will be a device that is 7-pin a different one a 2-pin device to get in touch external 12V supply and 3-pin terminal block is employed allowing you to connect relay inputs and outputs.

Pin plans in terminal obstructs are since below.

Relay Block

NC – Normally closed COM – Common NO – Typically open

Engine Block

VCC – Supply from external 12V or 9V that are internal is greater

External Supply Block

12V – outside energy for motor GND – Ground

Energy Headers

There’s two energy headers obtainable in this board, J9 for 9V and J7 for 5V.

Motor Procedure

You can find 4 lines for engine control and both DC stepper and engine engine could be interfaced towards the board. The engine may be interfaced to block that is terminal. The pins 2, 3, 4 and 5 are for engine lines.

Stepper Engine

For a unipolar stepper engine, connect 4 lines to your engine terminals and a standard terminal to your VCC. Place the jumper limit over 5, 6, 7 and 8 pins of J4 in order to connect pins to your microcontroller slot. For the bipolar stepper engine, link 4 lines to every associated with terminals. Place the jumper cap over 5, 6, 7 and 8 pins of J4.

DC Motor

For DC engine, link the motor line to virtually any one of many engine terminals and mail order wife VCC into the typical. Link the jumper limit from the J4 for the matching pin.

Relay Procedure

The relay are operated by shorting some of the first four-port pin pairs of connector J4 with the aid of a jumper.

Relay has 3 terminals in order to connect,

* NO – Normally available * COM – Common terminal * NC – Normally closed

Link the input in COM terminal. NO terminal will get in touch to the COM terminal through the relay OFF condition and NC is likely to be attached to the COM terminal during ON condition. The relay could be used to get a handle on energy products working up to 230V /7 A.