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

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

to be able to drive them, we truly need unique present motorists. Motor relay board comes in to the image due to these needs. Engine relay board drives engines and online-brides.net sign in relays by providing enough present. It could drive one relay and four DC engines or one motor that is stepper a time. The engine relay board eases the duty of interfacing motor that is external AC products with all the ATmega32 microcontroller. This has ULN2003 drivers for high applications that are current motor driving and relay driving circuits for AC unit interfacing.

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

Relay Motorist

Making use of the supplied relay circuit, 230V devices may be managed. This area is useful for automating the on / off.

Engine Driver

The DC engine could be controlled by using this part, there was 4 ULN2003 driver managed lines for driving motors 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 slot connector to your standard slot. * Shunt the jumpers in J4. * Use jumper caps to pick pins that are port. First four pins (0, 1, 2&3) are relay selectors. The relay are attached to 4 pins. * Use port pins 4,5,6&7 for engines in the near order of engine D, C, B&A. * Set the input slot pin correspondingly to show 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 could be straight accessed by the header J5.

Terminal Obstructs

Terminal blocks can be used for linking engine, outside supply, and relay equipment that is controlled.

There are three terminal blocks. A person is when it comes to engine that 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 can be used to get in touch relay inputs and outputs.

Pin plans in terminal obstructs are as below.

Relay Block

NC – Normally closed COM – Common NO – Ordinarily open

Motor Block

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

Exterior Supply Block

12V – outside energy for motor GND – Ground

Power Headers

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

Engine Procedure

You will find 4 lines for motor control and both DC stepper and motor engine may be interfaced to your board. The engine may be interfaced to terminal block J8. The pins 2, 3, 4 and 5 are for motor lines.

Stepper Engine

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

DC Engine

For DC engine, link the motor line to virtually any among the engine terminals and VCC towards the typical. Link the jumper limit in the J4 when it comes to pin that is corresponding.

Relay Procedure

The relay could be operated by shorting some of the four-port that is first 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 towards the COM terminal through the relay OFF condition and NC would 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.