Replies to Minipulse Plus

[johnandles]

Usually scopes has calibrating connection point at front control plate with standardized signal by shape and voltage.

You can check scope by external source of standardized signal (signal generator) too.

Thanks for your reply.
The scope has a connection for a square wave, 1khz, and 2v p-p. output test .
Just tried it,and reads correctly.
I will look into it Tomorrow...
Thanks

[WM6]

is there a test for my scope?..(in case it is telling me porkies)?

Usually scopes has calibrating connection point at front control plate with standardized signal by shape and voltage.

You can check scope by external source of standardized signal (signal generator) too.

[johnandles]

Does the detector actually work as it is?
If so, I suspect your scope is lying to you.

Yes the detector works. not getting the distances as others reported.
is there a test for my scope?..(in case it is telling me porkies)?

[WM6]

If so, I suspect your scope is lying to you.

Probably he should post scope settings photo here.

[Qiaozhi]

Untwisted the figure 8, but still the same flyback voltage so...
More investigating

Does the detector actually work as it is?
If so, I suspect your scope is lying to you.

[johnandles]

Good Question, I will test and let you know.

Untwisted the figure 8, but still the same flyback voltage so...
More investigating

[johnandles]

Is the flyback voltage correct for a normal mono (not figure coil?

Good Question, I will test and let you know.

[Qiaozhi]

The coil is a hand wound magnet wire formed to a fiqure 8 to reduce chatter in my interference infested room. lol
cheers

Is the flyback voltage correct for a normal mono (not figure 8 ) coil?

[WM6]

Software reading multiplier should be set at 10x to get correct results, cause sofware don't know how your probe is set.
With probe x10 and software reading multiplier x1 you cannot get correct results.

[johnandles]

In that case your PC scope is working differently to a normal oscilloscope. In fact, I see what you say is correct, as the charging period appears to be the right voltage.
Is the detector completed, or are you part way through the construction?

The board is completed,not housed.
Trying to find the problem.
The scope is a Hantec usb scope.
The coil is a hand wound magnet wire formed to a fiqure 8 to reduce chatter in my interference infested room. lol
cheers

[Qiaozhi]

The probe is set to 10x, but the software being set at 10x only multiplies the actual reading by 10.
If I leave the probe at 10x and put the software at 1x it reads 5.9 volts.
So I believe my flyback is too low?
Any ideas?

In that case your PC scope is working differently to a normal oscilloscope. In fact, I see what you say is correct, as the charging period appears to be the right voltage.
Is the detector completed, or are you part way through the construction?

[johnandles]

Your probe is set to x10 in the flyback image, so the voltage is actually 10 times higher than displayed.

The probe is set to 10x, but the software being set at 10x only multiplies the actual reading by 10.
If I leave the probe at 10x and put the software at 1x it reads 5.9 volts.
So I believe my flyback is too low?
Any ideas?

[Qiaozhi]

Low flyback voltage.??
coil 398 uh
1.1 ohms
scope shots with coil and without. (10nf cap)
[ATTACH]31183[/ATTACH] [ATTACH]31181[/ATTACH] [ATTACH]31182[/ATTACH]

Your probe is set to x10 in the flyback image, so the voltage is actually 10 times higher than displayed.

[johnandles]

Low flyback voltage.??
coil 398 uh
1.1 ohms
scope shots with coil and without. (10nf cap)

[multieagle]

Sorry, stupid question. !