Avt 1916 User manual

Schematic diagram of the switch is shown in Figure 1.

It must be supplied with 12VDC. Operation of the

switch is controlled by an Atmega8 microcontroller.

The ULN2003A circuit is used to power relays.

LED1...LED4 indicate which relay is energised. Relays

are switched using the S1...S4 buttons.

The "MODE" jumper is used to select the operation

mode, while the way of switching on a particular

relay is made using jumpers 1...4, switching them to

the "B" position - bistable operation or "M" -

monostable

operation.

The "MODE" jumper set in "SW" mode configures

the device to operate in the switch mode with the

possibility of setting any channel as a monostable

switch (jumper in "M" position - relay

is switched on as long as the button is held down) or

bistable (jumper in "B" position - each time the

button is pressed, the relay changes to the opposite

state). In the next mode, the switch can operate as a

dependent. To activate this function, switch the

"MODE" jumper to the "SEL" position. In this mode,

the 'S' sync input is activated and there is a low level

on this line every time a button is pressed. This

causes all relays to switch off and only the currently

selected relay to switch on. In addition, it is possible

to deactivate dependent operation for a channel in

this mode. It is then necessary to move the selected

jumper to the "B" position - from then on, each press

of the button will change the state of the assigned

relay to the opposite without affecting the other

channels, which will continue to operate in a

dependent manner.

A configurable 4-channel switch circuit, allowing the

attached devices to be controlled in any way. Each

output can operate in monostable, bistable and

dependent modes, and due to the synchronisation

output and input, it is possible to link multiple such

switches together.

• multiple such switches can be connected together

• supply: 12 VDC

dependent

Specifications

• output circuit: 4 relays 230 VAC / 10 A (NC/NO)

• board size: 68×75 mm

• independent configuration of each of the four outputs

• 3 operating modes: monostable, bistable and

Circuit description

Configurable 4-Channel Switch

AVT 1916

kits

ASSEMBLY DIFFICULTY

PDF

DOWNLOAD

Fig. 2 Arrangement of components on the PCB

Fig. 1 Schematic diagram

GND

1 2

ULN2003AN

GND +12V

+12V

O1 16

O2 15

O3 14

O4 13

O5 12

O6 11

O7 10

CD+ 9

GND

IC3

REL1

REL2

REL3

REL4

OUT1

OUT2

OUT3

OUT4

10k

+5V

MEGA8

GND

100nF

GND

PB5(SCK) 19

PB7(XTAL2/TOSC2)

PB6(XTAL1/TOSC1)

GND

VCC

GND

AREF

AVCC

PB4(MISO) 18

PB3(MOSI/OC2) 17

PB2(SS/OC1B) 16

PB1(OC1A) 15

PB0(ICP) 14

PD7(AIN1) 13

PD6(AIN0) 12

PD5(T1) 11

PD4(XCK/T0) 6

PD3(INT1) 5

PD2(INT0) 4

PD1(TXD) 3

PD0(RXD) 2

PC5(ADC5/SCL) 28

PC4(ADC4/SDA) 27

PC3(ADC3) 26

PC2(ADC2) 25

PC1(ADC1) 24

PC0(ADC0) 23

PC6(/RESET)

IC2

LED1

LED2

LED3

LED4

LED5

SYN

SEL

PK1

PK2

PK3

PK4

100uF

100nF100nF

+5V

GND

100uF

+12V

1N4007

78L05

C4C3

GND

VO 1

IC1

VCC

GND

+5V

LED1

LED2

LED3

LED4

LED1

LED2

LED3

LED4

GND

+5V

SV1

SV2

SV3

SEL

PK1

PK2

PK3

PK4

10k

+5V

SYN

Schematic diagram of the switch is shown in Figure 2.

Start by soldering resistors and other small

components onto the board and finish by fitting

electrolytic capacitors, screw connectors and relays. A

properly assembled circuit, once the configuration

jumpers have been properly set, is immediately ready

for operation. Changing the operating configuration

of a particular relay is possible at any time during

system operation and takes place independently for

each of the 4 channels.

IC2:............................ATmega8

Other:Resistors:

Semiconductors:

LED1-LED4: ............LED 3 mm

IC3:............................ULN2003

REL1-REL4:......................................JQC3FF/012-1ZS

VCC, VCC2, OUT1-OUT4: ..........ARK3/500

C3-C5: .....................100 nF

SV1-SV3:..........................................goldpin 1×5 + jumper

Capacitors:

S1-S4: ...............................................buttonR1, R2:......................10 kΩ

R3-R7: ...................... 1kΩ

D1:.............................1N4007

C1, C2: ....................100 μF

IC1:............................78L05

List of elements

Begin assembly by soldering the components onto the board in order of size from smallest

to largest. When mounting components marked with an exclamation mark, pay attention to

their polarity. Photographs of the assembled kit may be helpful. To access high-resolution images,

download the PDF file.

PDF

DOWNLOAD

Notes

The self-assembly kits are intended for educational and demonstration purposes only. They are not intended for use in commercial applications. If they are used in such applications, the

purchaser assumes all responsibility for ensuring compliance with all regulations

AVT SPV reserves the right to make changes without prior notice.Installation and connection of the appliance not in accordance with the instructions, unauthorised modification of

components and any structural alterations may cause damage to the appliance and endanger persons using it. In such a case, the manufacturer and its authorised representatives shall

not be liable for any damage arising directly or indirectly from the use or malfunction of the product.

This symbol means do not dispose of your

product with your other household waste.

Instead, you should protect human health

and the environment by handing over your

waste equipment to a designated collection

point for the recycling of waste electrical

and electronic equipment.

Leszczynowa 11 Street,

03-197 Warsaw, Poland

https://sklep.avt.pl/

AVT SPV Sp. z o.o.