Homes, hostels and schools lose treated water and electricity when pumps run after overhead tanks are full. Manual checking is unreliable, especially when occupants are away.
PRACTICAL PROJECT · Beginner–Intermediate
AquaGuard
Build a smart protector that stops water-tank overflow.
◷ 4–6 weeks✎ 5 stages
A working ESP32-based tank monitor that detects high and low water levels, controls a low-voltage demonstration pump and presents a tested product offer to a real customer.
Homes, schools, hostels, farms and small facilities in Ibadan.
THE BUILD JOURNEY
01Every stage ends with evidence.
Find the problem · 1–2 days
02Investigate the overflow problem
Prove that the problem is real before building anything.
Plan & source · 2–3 days
03Plan the system and source components
Turn the problem into a safe block diagram and affordable bill of materials.
Wire · 3–5 days
04Wire and assemble the prototype
Build a tidy low-voltage prototype that can be inspected and repaired.
Code & test · 4–6 days
05Program, calibrate and test
Make the controller respond reliably across realistic water levels.
Install & sell · 1 week
Package, validate and sell
Convert the prototype into an offer a customer can understand and buy.
LIVE COSTING LAB
Will the idea make money?
Adjust labour and profit assumptions. These September 2026 planning figures are illustrative; obtain current Nigerian supplier quotations before buying.
ESP32 development board₦12,500
Waterproof level sensor₦9,500
Relay module₦3,500
Demo DC pump and tubing₦8,500
Power supply and wiring₦6,500
Enclosure and fittings₦7,500
Materials per prototype₦48,000
Suggested selling price per unit₦72,0001 unit: ₦72,000 projected revenue · update prices with supplier quotations