Gigameter 1.2 Wiring

Wiring:
Ground is coming in from all over - Tie all together at -Batt, not the Arduino.

Same for +Batt, run wires out to the devices (Arduino, Amplifier)

Glue wires down for strain/vibration prevention.

Pot:
Gang Switch: One side to the battery, the output becomes -Batt for the rest of the prop.
Actual Pot: This thing is 50k and consumes almost no current.
One end of the pot to +5v at the Arduino, the other to ground. Wiper to the Analog In pin specified in the sketch.
For wiring simplicity, you can hook one side of the pot and the gang switch to the same ground wire.

Relay Coil: Side 1 to Arduino Signal, Side 2 to /Ground on Arduino. Coil should be ~10ma tops. DIODE ACROSS COIL REVERSE BIAS for spike snubbing. 1N4148, etc.
Relay Contacts: NO to -Led, Common to -Batt. Easy wiring - connect COM and Coil ground together - 1 wire.

Dome LED's: Position and wire LED's so that you have two red and two white LED's in series chains. Parallel them.
Put 100 ohm resistors in series with each pair.
Connect the + Side to +Batt, and - side to COM on Relay

Motor: Parallel with the LED's power source at the Relay.

Ears: Each LED has a dedicated digital pin with a 20ma recommended load - which our LED's are.
LED's should be common Anode (to +Batt) and Cathodes to signal lines on Arduino.

Display, Sound, and Servo Power Sections:
Hook up a 5v switching module, and chain a 3.3v regulator off of it. Mount in the battery tray. Run wires to power the display/audio chip (3.3v) and Servo (5v).
Make sure to put a ~100uF 25v cap in parallel with the input to the 5v regulator to prevent inductive spike blowout.

Display Wiring:
Tie Brightness (18) to VDD (17). Tie DE (14) to Ground (1).
Run Serial Data (15) and Clock (16) to pins on Arduino.
Outputs for bit 24 + 25, pins 4 & 5, are SINK on enable, so they need to be hooked to the face LED Cathodes. Hook anodes to +3.3v on the display.

Servo Wiring:
Just run the PWM Input (Signal) to the arduino by itself. Easy.

Sound Chip Wiring:
Sound 1 and 2 to Signals on Arduino. Sound Chip DAC to Amp In. Amp out to Speaker. You may need to put a pot in line with DAC Out to cut the level down.

Electrical BOM:
Name 					-	Quantity	-	Part #
3mm Ear LED				-		6		-	Digikey 160-1664-ND
5mm White Dome LED		-	   	4		-	Digikey 1080-1005-ND
5mm Red Dome LED		-	   	4		-	Digikey 516-3531-1-ND
Serial LED Display		-	   	1		-	Digikey 160-1980-5-ND
Display Face LED		-	   	2		-	eBay - 2x5x7 White LED
Scan Microswitch		-	   	1		-	Digikey Z5074-ND
50k Gang Switch Pot		-	   	1		-	Digikey 987-1284-ND
Speaker					-		1		-	Digikey 102-1300-ND
Arduino Nano			-		1		-	eBay - Arduino Nano
WT588 Prop Sound Chip	-		1		-	eBay - WT588-16p
WT588 Programmer		-  		1		-	eBay - WT588 Programmer
LM1117-3.3v Regulator   -		1		-	Digikey LM1117T-3.3/NOPB-ND
5v Switching Regulator  - 		1		-	eBay - Matek 5v Regulator
Dome Motor - 300rpm 12v -		1		-	eBay - N20 12v 300rpm Gear Motor
LM386 Amplifier			-		1		-	eBay - LM386 Amplifier

Mechanical BOM:
Name 					-	Quantity	-	Part #
Heat-Set Inserts/Plas   -	   8		-	McMaster 94180A323
Metric M4 Nut			-	   2		-	Anywhere
Metric M2.5x20mm SHCS   -	   6		-	Anywhere
Metric M2.5x12mm SHCS   -	   2+		-	Anywhere
Metric M4x16mm BH		-	   2		-	Anywhere
Metric M1.6x4mm SHCS    -	   2		-	eBay
Metric M2.5x6mm SHCS    -	   2		-	eBay
4.0mm Drill Bit			-	   1		-	Anywhere
3/16 Drill Bit			-	   1		-	Anywhere
3/16 Acrylic Rod		-	   1		-	eBay