333 Water Quality Classifier Core
333 : Water Quality Classifier Core
- Author: AG1 - Ghani Lab - Emirates Chips Competence
- Description: Low-cost ASIC for water quality classification using signal behavior analysis
- GitHub repository
- Open in 3D viewer
- Clock: 50000000 Hz
How it works
This design implements a simple water quality classification system using two internal engines.
Engine 1 extracts signal features from incoming sensor data:
- peak value detection
- running average
- signal variation tracking
Engine 2 classifies the water condition into three states:
- 00 = CLEAN water (low variation, low signal level)
- 01 = WARNING (moderate instability or contamination level)
- 10 = UNSAFE (high signal amplitude or instability)
The system does not require chemical analysis. Instead, it uses electrical signal behavior as a proxy for water quality.
How to test
-
Run simulation using cocotb: make -B
-
View waveform: gtkwave tb.vcd
-
Test input behavior:
- Set uio_in to low stable values → CLEAN output expected
- Vary uio_in slowly → WARNING expected
- Apply high constant or noisy values → UNSAFE expected
You can also use a function generator (FNIRSI) to simulate:
- sine wave = clean water
- distorted wave = warning
- square/noisy wave = unsafe
Connect generator output through a simple comparator or ADC stage into uio_in pins.
External hardware
No external hardware required for simulation.
For lab testing:
- FNIRSI function generator
- optional comparator circuit
- optional Arduino or ADC interface to convert analog signal into 8-bit digital input
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | Sample Enable | STATE0 | Sensor0 |
| 1 | Unused | STATE1 | Sensor1 |
| 2 | DBG0 | Sensor2 | |
| 3 | DBG1 | Sensor3 | |
| 4 | AVG0 | Sensor4 | |
| 5 | AVG1 | Sensor5 | |
| 6 | AVG2 | Sensor6 | |
| 7 | AVG3 | Sensor7 |