Need help Gary metal detector

[yhl]

Hello chemelec

Hello chemelec I answered your question. IC9.6 pin voltage is 0.2V. the coil close to the big iron, can go to 0.6V. IC10, 6 pin from -0.3V to-3V.

[yhl]

IC9 to AD811.

IC9 to AD811. Depth increases / 10 * 20cm of iron can be detected 70 cm. Cans in 50 cm. But the AD8116 pin voltage is not adjusted.

[yhl]

Again 30CM coil, the maximum depth of no more than 75CM.

[WM6]

Again 30CM coil, the maximum depth of no more than 75CM.

Very good results.

[chemelec]

Hello chemelec I answered your question. IC9.6 pin voltage is 0.2V. the coil close to the big iron, can go to 0.6V. IC10, 6 pin from -0.3V to-3V.

Well NOW you answered it, But you didn't Previously.
Those results are Normal!

Again 30CM coil, the maximum depth of no more than 75CM.

And your Distances also Sound OK.

So What's your Problem?
What Distance do you Expect?

[yhl]

What I mean is, you detect a coin is a long time in the 20CM tweet it? Slowly to the beeps, or just sensitive?
I think it is low sensitivity. Coins in the air 13CM long beep.

[chemelec]

What I mean is, you detect a coin is a long time in the 20CM tweet it? Slowly to the beeps, or just sensitive?
I think it is low sensitivity. Coins in the air 13CM long beep.

It is REALLY Difficult to Understand: What your trying to say?

FOR BEST SENSITIVITY:
With NO Metal Near the Coil, You should set VR2 for a Low Audio Tone (Tweet) from the piezo of around 50 to 150 Hz.
When Metal comes near the Coil this Frequency will Increase.

If you set VR2 so you have No Tone (No Tweet) with No Metal, It will NOT Give you good Sensitivity!

[maikl]

What I mean is, you detect a coin is a long time in the 20CM tweet it? Slowly to the beeps, or just sensitive?
I think it is low sensitivity. Coins in the air 13CM long beep.

yhl gets clear shift in tone at 130mm in the earpiece, and a perceptible shift in
tons at up to 200mm (diameter of coin ???). yhl probably interested in it, which is the maximum sensitivity of the coin.

[chemelec]

yhl gets clear shift in tone at 130mm in the earpiece, and a perceptible shift in
tons at up to 200mm (diameter of coin ???). yhl probably interested in it, which is the maximum sensitivity of the coin.

Well Depending on the Size of the Coin, That may be Good or Bad.

But What I Wrote PREVIOUSLY, Will Give Maximum Sensitivity.

Using an 8 inch Coil:
I can Detect a Canadian Quarter (15/16 inch Diameter and made of Nickel Metal) at 30 Cm in Air.
Or a US Quarter (Same Diameter and I Believe they are Zinc metal) at 25 Cm in Air.

[yhl]

I know, I mean 2.5 cm of nickel coin, detected in 20 cm, just sensing.
When the 13 cm has been crying. The next question is sensitive?

[yhl]

Hello my friend

Hello, your 8-inch coil can detect how far the large metal?

[chemelec]

Hello, your 8-inch coil can detect how far the large metal?

Depends on the Type of Metal, And How Good your Coil is and if your using 100 or 1000Hz.

[yhl]

The power of your detector, you can use the 14.8V it?
I have four mobile phone battery is 3.7V1000 mA.
PI and IB/ metal detectors , who is the best?

[yhl]

HELLO CHELMELEC

Can you give me your detector IC used in the correct name? I do not need substitution.
I use all parts of your reproduction of a detector.

[chemelec]

Can you give me your detector IC used in the correct name? I do not need substitution.
I use all parts of your reproduction of a detector.

Sorry, Don't understand.
All Parts are Listed in my parts list!

A 555 is a 555.
It Doesn't matter if its a ua555 or an MC555 or a TL555.
Those letters are just the Manufacturer.