Switch lcd relays

Using Arduino Project Guidance
1

I want make a unit for my van that allows control over 4 12v power lines 3 buttons 4 relays and a little lcd text screen to display whats on and off like a status screen

i have the 5-32v dropper to 5v

the screen and a 4 relay modual

this is my first of a few projects i wana make

after i make it on bread board can i write it to a micro chip after or is it to early to tell i wana try make it small and mount it on a dash

3 buttons

1 for beacons , 2 modes (2 wires) 1 tow beacon 2 full beacons
2 for aux power supply
3 for inverter

lcd 2 lines top company name
2'nd line will flick through saying beacon : OFF : TOW : ALL
Inverter : ON : OFF
Aux Power : ON : OFF

thats all it will do and then to make board and case for it

duno if i missed anythink

any suggestions on stuff i could change i want it to be low power use as i dont want switches

any input will be great

2

What experience do you have in electronics and programming? Provide a basic circuit and program the members to comment or improve.

What type of display are you using? IE, is it a basic parallel data input or I2C?
The second line would need to scroll as I assume the display is 16x2.

What version Arduino are you using for development? There are circuits around to show how to use the MPU from the Arduino board on a home made board. Just develop the program and once you are happy, buy another MPU to suit your Arduino, program it and use in your own board.

Weedpharma

3

i do C++ programming , i do electrics , never used arduino before so be a first , latest ide and have uno r3 and Leonardo dont know what to use

duno cam in a kit for 2 line display

well needs 3 push buttons 4 relay and the screen
i have the relays and a modual x4 relays 4 signal wire
push buttons to trigger relay and lcd read

like Beacon then var to indicate the On or Off state

i want lcd to cycle so if write to it every 2 second - 5 seconds so referee to var to change state

the resisters ect is going to be my issue for switches and after i hope to make the board and ad the chip to it

4

Your basic switch read requires that you have a R (10k) from 5v to the input and the switch to gnd. Read the digital input value as 0 (switch closed) and do what ever you want.

The output from the Arduino feeds into the input of the relay board. I assume the relay board has its own power supply and you have the gnd from it connected to the Arduino gnd.

Without knowing the details of the display we cannot tell you how to drive it. Can you give the details of the kit?

As you are new to Arduino, you need to play with the basics of reading switches and turning on relays before going into the display. Use Serial.print() to output to the PC screen for fault finding.

Weedpharma

5

the relays board uses 5v for switching , of arduino or power reg , yea output is important need a debug type output as screen only displaying status

lcd is this
http://www.ebay.co.uk/itm/HD44780-Backlit-1602-LCD-Display-Blue-Yellow-Green-16x2-Arduino-Raspberry-Pi-AVR-/281211020326?pt=UK_BOI_Electrical_Components_Supplies_ET&var=&hash=item41797ba426

relay is this
http://www.ebay.co.uk/itm/5V-DC-Four-4-Channel-Relay-Module-for-Arduino-Raspberry-Pi-Pic-AVR-/271422236701?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item3f3206a81d

i duno if worth getting this for smaller foot print
http://www.ebay.co.uk/itm/Blue-1-3-IIC-Serial-128X64-OLED-LCD-LED-Display-Module-Arduino-dwy-/310909078200?tfrom=261433793901&tpos=top&ttype=price&talgo=undefined

hope this helps
waiting on female jumpers to start playing with the code then all the screen output

6

witch of my 2 ardunios should i use ? uno or Leonardo

7

I am also new to Arduino so cannot recommend the model Arduino to use.

The LCD is a parallel data type and there details on the forum etc on using it. I have only used an I2C series LCD from Deal Extreme. I was able to find data on it in one of the reviews on the site.

The relay board looks ok, just remember to join the gnd to the Arduino gnd.

Weedpharma