Rotondo Farms

Power Flow

Click watt values to edit · live budget updates below

AC MAINS SUPPLY

Wall outlet

120V AC

15 A · 120V

6-outlet strip

Max: 1,800 W

Strip load: 107.90 W · 6%

↓ USB charger (pump)
↓ USB charger (Pi)
↓ Mars Hydro TS600
↓ other devices

PUMP CIRCUIT (5V DC)

USB charger

5V · 1-2A

6-outlet strip
Max:10W

Relay (K1)

COM → NO switch

Draw:0.36W

Pump motor

5V DC

Draw:5W

Water flow

drip emitters

— passive —

PI CIRCUIT (5V DC)

USB charger

5V · 2A

6-outlet strip
Max:10W

Raspberry Pi Zero 2W

5V · ~1W idle

6-outlet strip
Draw:2.5W

Float switch

GPIO17 · 3.3V

Draw:0.01W

SENSOR CIRCUIT (3.3V VIA PI)

ADS1115 ADC

3.3V · I2C · 0x48

Max:0.001W

Moisture sensor

A0 · wet ~10900

Draw:0.033W

GROW LIGHT CIRCUIT (120V AC)

Wall outlet

120V AC

Max:120W

Mars Hydro TS600

120V · 100W actual

6-outlet strip
Draw:100W
Power flow
Control / data signal
GPIO signal

POWER BUDGET

All circuits within limits

PUMP CIRCUIT (5V)

Relay coil0.360 W
Pump motor5.00 W
Draw5.36 W
Charger max10.00 W

54% utilized

PI CIRCUIT (5V)

Pi Zero 2W2.50 W
Float switch0.010 W
ADS1115 ADC0.001 W
Moisture sensor0.033 W
Draw2.54 W
Charger max10.00 W

25% utilized

TOTAL SYSTEM

Peak draw107.90 W
Combined supply120.00 W

6-OUTLET STRIP · WALL CIRCUIT

Farm system107.90 W
Other devices0.000 W
Strip total107.90 W
Strip rated max1800.00 W
Wall circuit15 A · 1800.00 W
Wall draw107.90 W

<6% of wall circuit

△ Pump inrush may spike 2–3× rated watts at startup.

△ Sensor draw routes through Pi's 3.3V regulator, included in Pi total.