After several tests I have made our version 1 model using 400 to 1000v pulse.
Opto isolated pic will read pulse to the low voltage size and separate cycle voltage result in eight samples with 1024 levels.
Those eight samples are depth and 1024 value is target size.

This model will have
- LCD screen and sound monitoring.
- microprocessor programmed system.
- Manual and auto Ground balancing.
- Surface trash and iron filtering system
- Target depth and size calculating.

Patience, I can show results soon..

Rest 5000 shares will be available after that.