Delta Pulse

[misko]

Delta pulse 2. LCD initially worked ok. Now there is an error on the LCD. viewing on youtube. Can anyone help me.

http://youtu.be/8pqYkuDI14o

[VUJO]

Hi VUJO
-DP the scheme & PCB Son1 true , no mistakes .(Mistake in implementation)
---The cause ringing frequency What are the size , specifications of your coil?-- may need to change the resistance=R5 1k ~ 2.2k /1w of each suitable coil!!!!!
best time
j.

Characteristisc of the search coil are:
-250mm-diameter coil
-number of turns 25
-wire diameter of 0.4mm
-coil resistance of 2.5Ω
-500µH inductance
-Pulse frequency 400Hz
-Resistor R5 of 820Ω/2W

[jap]

Hi VUJO
-DP the scheme & PCB Son1 true , no mistakes .(Mistake in implementation)
---The cause ringing frequency What are the size , specifications of your coil?-- may need to change the resistance=R5 1k ~ 2.2k /1w of each suitable coil!!!!!
best time
j.

[VUJO]

full of errors

That schematic is full of errors.

I am an amateur electronics and I did Delta-Pulse in the file that was declared valid in this forum..PCB I did Son1.Basic indicators to show that everything is ok (amperage voltage levels ...), but not detected by metal detectors. when the search coil is closer to a large metal surface can be heard ringing frequency TX.You you said that the scheme has many mistakes and would like you to reap where they would and my detector worked.Sorry for my English langue
many thanks advense

[apocalypto]

Hi KT315
Have you news about the nex PCB ?
Best times

[jap]

Hi kt315
This is clear - thanks
best time
j.

[kt315]

whether the two diodes facing correctly?

fixed.

[jap]

mistake for VD8,9.

Correct the mistake for VD8,9.
Can be an alternative to the two by zd.
best time
j.

[VUJO]

Hi kt315
I have two choices 1 , 2 to get a -E.
I hope their research.
best time
j.

whether the two diodes facing correctly?

[jap]

Hi kt315
I have two choices 1 , 2 to get a -E.
I hope their research.
best time
j.

[kt315]

PEOPLE, CAN YOU WAIT A LITTLE? I do all as far as in me lies you all will get NORMAL WORKING AND TESTED PCB.

[apocalypto]

the schematic now is ABSOLIUTELY and CLEARLY without mistakes.

do not abuse the people, PLEASE.

Hi KT315
is this the last revised PCB ?

[raff33]

thanks

the schematic now is ABSOLIUTELY and CLEARLY without mistakes.

do not abuse the people, PLEASE.

Hi kt315;
many thanks for reply i will try to do this shielding ......
REGARDS

[kt315]

the schematic now is ABSOLIUTELY and CLEARLY without mistakes.

do not abuse the people, PLEASE.

[satdaveuk]

It seems pretty doomed this project, ever since the first version came out a few years ago, its been full of pitfalls errors, but saying that, them who dares wins maybe oneday.

The Minipulse 3 was full of half truths and failures but with determination and not giving up, I turned it around and made quite a nice machine, far as I know proberly the only engineer thats actually made a fully working version of it on Geotech.

All im doing now is perfecting a nice coil to marry up to it, then shall post a fully working project of it on here with all the errors missed out.

O and by the way this one does detect small gold rings etc even with a very basic 6" coil unlike this project.