Electromagnetic Water Descaler Creation
Budget: ₹600 – ₹1,500 INR
Looking for PCB Designer who can develop and design PCB for My project. here i have shared rough blueprint design PCB that fulfill my requirement
ESP32-Based Electromagnetic Water Descaler
(Agricultural Application — 10 HP Pump, 3–5 inch PVC Pipe)
This project develops an ESP32-controlled electromagnetic water descaler for agricultural irrigation systems. It uses 4–6 externally wound copper coils energized in pairs, switching at 15–40 kHz PWM frequencies. High-efficiency MOSFETs and gate drivers generate alternating magnetic fields to reduce scaling, improve water quality, and enhance irrigation efficiency in high-TDS water conditions.
1. System Overview
•
Supply Voltage: 12–15 V DC (regulated to 3.3 V for ESP32)
•
Controller: ESP32 (PWM generation, frequency sweep 3–40 kHz)
•
Outputs: 4 independent coil channels (A–D), operated in pairs (A+B or C+D)
•
Switching: High-speed MOSFETs with gate drivers (TC4427)
•
Objective: Minimize scaling and improve water quality in irrigation systems
2. Top-Level Block Flow
+12V IN → Fuse → TVS → Bulk Cap
|
+----> Gate Drivers → MOSFET H-bridges → Coils
|
Regulator → 3.3V → ESP32
ESP32 → Input Resistors → TC4427 Drivers → Gate Resistors → MOSFETs → Output Coils
3. Signal / Net Names
•
VIN_12V : Raw DC input
•
VIN_FUSED : Post-fuse supply
•
VCC_3V3 : ESP32 supply
•
OUT_A..D : Coil outputs (via coupling network)
•
GATE_A..D : MOSFET gate nets
•
DRV_VDD : Gate driver supply (12 V rail)
•
GND : Common return
4. Per-Channel Circuit Structure
•
Input: ESP32 GPIO → R_in (220 Ω) → TC4427 driver input
•
Output: TC4427 → Rg (10 Ω) → MOSFET gate, with Rpd (10 kΩ) to ground
•
H-Bridge MOSFET → R_series (4.7 Ω, 2 W) → C_cpl (1 μF, 50 V film) → Coil terminal
•
Optional RC snubber (47 Ω + 100 nF) across coil terminals
5. Coil Wiring & Logic
•
4 coils: Wrap_A, Wrap_B, Wrap_C, Wrap_D
•
Pairing:
o
Pair 1 = A + B
o
Pair 2 = C + D
•
Operation: ESP32 energizes one pair (10–60 s) while sweeping 3–32 kHz, then switches to the other pair.
6. Power & Decoupling
•
Bulk input capacitor: 470 μF, 25 V electrolytic
•
Driver decoupling: 0.1 μF ceramic + 10 μF electrolytic (near each TC4427)
•
Local decoupling at MOSFETs: 0.1 μF ceramic
•
Fuse: PPTC 2–3 A
7. PCB Placement Notes
•
Place input power (J1, fuse, TVS, bulk cap) at board edge
•
ESP32 + regulator near left-center
•
TC4427 drivers between ESP32 and MOSFET blocks
•
MOSFETs, R_series, C_cpl near coil screw terminals (board edge)
•
Use top = signals & power, bottom = solid GND plane
•
Provide test pads: TP_12V, TP_3V3, TP_GND, TP_GATES, TP_OUTS
8. Safety & Testing Steps
1.
Check polarity & continuity before power-up
2.
Power with current-limited 1 A supply, verify rails
3.
Run sweep without coils first (probe TP_GATES)
4.
Connect single coil, run low duty test (3 kHz, 10%)
5.
Gradually ramp frequency & duty; monitor temperatures
9. Compact BOM
•
ESP32-WROOM (1x)
•
TC4427 dual gate driver (2x)
•
N-channel MOSFET (AOD4184A / IRLZ44N) (4x)
•
R_in: 220 Ω (4x)
•
Rg: 10 Ω (4x)
•
Rpd: 10 kΩ (4x)
•
R_series: 4.7 Ω, 2 W (4x)
•
C_cpl: 1 μF, 50 V film (4x)
•
Bulk capacitor: 470 μF, 25 V (1x)
•
TVS diode: SMBJ15A (1x)
•
PPTC fuse: 2–3 A (1x)
•
Screw terminals: 4x
ESP32-Based Electromagnetic Water Descaler
(Agricultural Application — 10 HP Pump, 3–5 inch PVC Pipe)
This project develops an ESP32-controlled electromagnetic water descaler for agricultural irrigation systems. It uses 4–6 externally wound copper coils energized in pairs, switching at 15–40 kHz PWM frequencies. High-efficiency MOSFETs and gate drivers generate alternating magnetic fields to reduce scaling, improve water quality, and enhance irrigation efficiency in high-TDS water conditions.
1. System Overview
•
Supply Voltage: 12–15 V DC (regulated to 3.3 V for ESP32)
•
Controller: ESP32 (PWM generation, frequency sweep 3–40 kHz)
•
Outputs: 4 independent coil channels (A–D), operated in pairs (A+B or C+D)
•
Switching: High-speed MOSFETs with gate drivers (TC4427)
•
Objective: Minimize scaling and improve water quality in irrigation systems
2. Top-Level Block Flow
+12V IN → Fuse → TVS → Bulk Cap
|
+----> Gate Drivers → MOSFET H-bridges → Coils
|
Regulator → 3.3V → ESP32
ESP32 → Input Resistors → TC4427 Drivers → Gate Resistors → MOSFETs → Output Coils
3. Signal / Net Names
•
VIN_12V : Raw DC input
•
VIN_FUSED : Post-fuse supply
•
VCC_3V3 : ESP32 supply
•
OUT_A..D : Coil outputs (via coupling network)
•
GATE_A..D : MOSFET gate nets
•
DRV_VDD : Gate driver supply (12 V rail)
•
GND : Common return
4. Per-Channel Circuit Structure
•
Input: ESP32 GPIO → R_in (220 Ω) → TC4427 driver input
•
Output: TC4427 → Rg (10 Ω) → MOSFET gate, with Rpd (10 kΩ) to ground
•
H-Bridge MOSFET → R_series (4.7 Ω, 2 W) → C_cpl (1 μF, 50 V film) → Coil terminal
•
Optional RC snubber (47 Ω + 100 nF) across coil terminals
5. Coil Wiring & Logic
•
4 coils: Wrap_A, Wrap_B, Wrap_C, Wrap_D
•
Pairing:
o
Pair 1 = A + B
o
Pair 2 = C + D
•
Operation: ESP32 energizes one pair (10–60 s) while sweeping 3–32 kHz, then switches to the other pair.
6. Power & Decoupling
•
Bulk input capacitor: 470 μF, 25 V electrolytic
•
Driver decoupling: 0.1 μF ceramic + 10 μF electrolytic (near each TC4427)
•
Local decoupling at MOSFETs: 0.1 μF ceramic
•
Fuse: PPTC 2–3 A
7. PCB Placement Notes
•
Place input power (J1, fuse, TVS, bulk cap) at board edge
•
ESP32 + regulator near left-center
•
TC4427 drivers between ESP32 and MOSFET blocks
•
MOSFETs, R_series, C_cpl near coil screw terminals (board edge)
•
Use top = signals & power, bottom = solid GND plane
•
Provide test pads: TP_12V, TP_3V3, TP_GND, TP_GATES, TP_OUTS
8. Safety & Testing Steps
1.
Check polarity & continuity before power-up
2.
Power with current-limited 1 A supply, verify rails
3.
Run sweep without coils first (probe TP_GATES)
4.
Connect single coil, run low duty test (3 kHz, 10%)
5.
Gradually ramp frequency & duty; monitor temperatures
9. Compact BOM
•
ESP32-WROOM (1x)
•
TC4427 dual gate driver (2x)
•
N-channel MOSFET (AOD4184A / IRLZ44N) (4x)
•
R_in: 220 Ω (4x)
•
Rg: 10 Ω (4x)
•
Rpd: 10 kΩ (4x)
•
R_series: 4.7 Ω, 2 W (4x)
•
C_cpl: 1 μF, 50 V film (4x)
•
Bulk capacitor: 470 μF, 25 V (1x)
•
TVS diode: SMBJ15A (1x)
•
PPTC fuse: 2–3 A (1x)
•
Screw terminals: 4x