Question about Wiring

[ghost]

Here are my standard informations about connecting an Arduino Mega ( I use an Arduino Mega Rev 3 for this) to an DS 1307, an Analog Microphone or an 16x32 RGB Matrix. But there are more GND Inputs on the Mega required than there actually are. These are the informations about wiring the DS 1307 and the Microphone
Píns Pins on the Patine
DS1307 GND GND
5V 5V
Digital Pin 4 Digital Pin 4
Digital Pin 5 Digital Pin 5
Microphone AO AI
GND GND
VCL Power

And this is about wiring the RGB Matrix
R0 2
G0 3
B0 4
GND GND
R1 5
G1 6
B1 7
GND GND
A A0
B A1
C A2
D A3
CLK 11
STB 10
OE 9
GND GND
Can you tell me how your wired it or which pins ar useless for the clock or spectrum analyzer or which pin can get on another Input pin on the Mega?
Grateful,
Revedar

[ghost]

I found this Graphic on the Adafruit website: https://learn.adafruit.com/system/assets/assets/000/023/826/medium800/led_matrix_plug2.png?1426392350

[ghost]

Sorry. I solved it with this :http://cdn.instructables.com/FDY/DDW9/HQVLDSGJ/FDYDDW9HQVLDSGJ.LARGE.jpg

[twonk]

Apologies for not getting back to you sooner. Here are all of the connections in use:

For the grounds, you'll need to combine some of them together and then attache to a ground pin.

RTC
SDA -> D20
SCL -> D21
MOS -> not connected
VCC -> 5v
GND -> GND

Button 1
D2 and GND

Button 2
D3 and GND

Microphone board
VCC -> 3.3v & AREF
ANALOG OUT -> A0
GND->GND

Matrix Connector

Left	Right
G1 -> 25	R1 -> 24
GND	B1 -> 26
G2 -> 28	R2 -> 27
GND	B2 -> 29
B -> A1	A -> A4
D -> GND	C -> A2
LAT -> A3	CLK -> D12
GND	OE -> D8

[ghost]

Last question: Do you use 2 or 4 pin buttons?
Sorry that i have so much questions i just came in the last 9 moth into electronics and in school we will just talk about this theme in 2 year and the next opportunity to learn programming for me is on the university and then the also the next time when i have enough time to come into coding.

[twonk]

No problem at all.
I used two pin buttons, but usually on four pin buttons the pins are in two
pairs, so as long as you use one pin from each side it will be fine.
These are great projects to get started with. There is nothing better than
an LED display!

On 20 April 2015 at 15:41, Revedar notifications@github.com wrote:

Last question: Do you use 2 or 4 pin buttons?
Sorry that i have so much questions i just came in the last 9 moth into
electronics and in school we will just talk about this theme in 2 year and
the next opportunity to learn programming for me is on the university and
then the also the next time when i have enough time to come into coding.

—
Reply to this email directly or view it on GitHub
#3 (comment).

[ghost]

I agree :D