D.I.Y Arduino Shield

Projects General Guidance
1

Greetings brethren. Please check my design and kindly correct me where did I made mistake.

I created an Arduino shield which consist of DHT, RF module, LEDs, a couple of water level sensors and a fan controller.

This is my schematic;
http://postimg.org/image/amtmw0xzd/

These are my shield design;
http://postimg.org/image/7d8e9skij/
http://postimg.org/image/vv0hxon2z/
http://postimg.org/image/xo3em089n/
http://postimg.org/image/skfv28813/

I've tested the voltage provided from Arduino and it does gives 5v. Other components are not running, even the LEDs.

How should I rectify this?

2

Have you had the exact same circuit working properly on a breadboard?

You need to post your code. Use the code button </> so it looks like this

...R

3

yes sir i tested on a breadboard first. it works.

4

holymarder:
yes sir i tested on a breadboard first. it works.

Then my immediate assumption must be that you have made an error moving from your breadboard circuit to your shield circuit.

...R

5

Nothing jumps out at me as wrong in the schematic... I may be missing something.

are those connections to the pin header making good contact? Not knowing how it's fabricated (since there are no pics of the other side), I'm dubious about those connections... Check em with your multimeter.

6

Hi,
What is your 5V regulator, is it connected properly?
If you look at the data sheet for the regulator you will see that there should be bypass capacitors around it.

Also the gnd of the regulator power supply is not connected to the gnd of the arduino.

Your PCB pattern needs to have the component designators on it so we can check it against your "circuit".

You diagram needs to place the text away from the wiring, I know its fritzy and I'm getting slowly ill, but can you tidy it up so we can clearly see where wires go.

Google expresspcb
Its free and a proper schematic CAD.

Tom...
Can you show us a picture of the copper side of your PCB?
A good first try, but you need to establish some basics.

7

TomGeorge:
Hi,
What is your 5V regulator, is it connected properly?
If you look at the data sheet for the regulator you will see that there should be bypass capacitors around it.

Also the gnd of the regulator power supply is not connected to the gnd of the arduino.

Your PCB pattern needs to have the component designators on it so we can check it against your "circuit".

You diagram needs to place the text away from the wiring, I know its fritzy and I'm getting slowly ill, but can you tidy it up so we can clearly see where wires go.

Google expresspcb
Its free and a proper schematic CAD.

Tom...
Can you show us a picture of the copper side of your PCB?
A good first try, but you need to establish some basics.

here you go Tom.

http://postimg.org/image/4h9zjrvp9/

my 5v regulator is the voltage regulator lm7805, drawing current from 12v 5a step-down transformer.

I used fritzing to design this, I'll switch to expressPCb but may i ask what's the difference between these two?

8

i just realised i made the silliest mistake. this is the answer to my problem. Soldering Headers to Front of Circuit Board - YouTube

now the fan part though..

9

Hi,
Have you used a DMM and checked every track and pin to track connection.

Please check with the data sheet on your regulator.

With the reg facing you to show its part number, pins pointing down, the pins are left to right, INPUT, GND, OUTPUT.

On your PCB the right hand terminal only has one connection and that is to the socket pins, I presume from your power supply.

Tom.... :slight_smile:

10

Hi,

Tom... :slight_smile:

11

TomGeorge:
Hi,

https://www.youtube.com/watch?v=IIVo_jTGA3s

Tom... :slight_smile:

Hi Tom.

this is the latest pcb design. however is it safe to connect Gnd from pwer supply to Gnd of arduino like so..

http://postimg.org/image/9waxwlsth/

12

Hi,

Please read and check post #8 and #9 against your prototype and PCB design.
Can you post a picture of the regulator end of the board and mark what pins on the board are for the power supply to connect to?

If you use REPLY instead of QUICK REPLY, you will find at the bottom of the screen an attachment facility.
You can attach your files there please, it makes them easier to load and view.

Thanks ..Tom.... :slight_smile:

13

TomGeorge:
Hi,

Please read and check post #8 and #9 against your prototype and PCB design.
Can you post a picture of the regulator end of the board and mark what pins on the board are for the power supply to connect to?

If you use REPLY instead of QUICK REPLY, you will find at the bottom of the screen an attachment facility.
You can attach your files there please, it makes them easier to load and view.

Thanks ..Tom.... :slight_smile:

http://postimg.org/image/wpmpmvrf7/
Hi Tom.

Here you go.

What's your opinion on this? :slight_smile:

14

holymarder:
What's your opinion on this? :slight_smile:

It looks very neat but it is completely impossible to see how the components and the PCB track interact.

...R

15

Hi,

Thanks for the pic, you need to place component designators on the file screenprint overlay of your board, so we can identify components.

Tom... :slight_smile: