Pleas help me in my hammer head opt1

[marthen337]

Hello
my name is marthen and i live in syria am30 years old. And i made hammer head 1 but its didnt work and i dont know why if any one can help me i ll bee thankfull for all
the sound not work and i dont know how to make it
i use nee555p
icl7660s
cd4016be
ne5534p
tl072cp
and cd 74hc221
i made every thing right and i dont know
why its didnt work
pleas help me

[waltr]

Did you follow Carl's setup instructions???
Checked for shorts, parts in correctly, pin 1 in pin 1).
Check the Pulses with a O'scope?
Read the many other HH Help threads?

[Carl-NC]

1. Do you have an oscilloscope?

[dbanner]

Maybe you can upload some pics of your pcb(top and bottom side).

[marthen337]

hi

thank you for reply me
i dont have any oscilloscope
and am new in this hoppy and there is no sound when i turn it on
the irf 740 its didnt go hot i chech it by volt meter its give 12 volt out to the coil can i massege you by email to give you some pic
You dont know how much i need this project its for helping the people here to save them life
many kids die here cus there is no metal detector here and its now allow here also
i live in war country and 7 years of war here
pleas if any one have made this detector can help me

[kt315]

contact with electronics guy in your neigbour. give him the article of Carl to read.

[marthen337]

Thank you for your reply
i send to carl some pic of my pcb and
i want to put some pic here but i dont know how
Thank you so much

[marthen337]

[marthen337]

[marthen337]

I use this pcb

[marthen337]

This new pic i take it now

[Carl-NC]

You will need to find an oscilloscope. Not much you can do without one.

[marthen337]

Can i use a laptop app oscilloscope
i find some app for laptop mapy its work . What you think

[6666]

give it a try, with a proper voltage limiting probe, DO NOT TRY and measure the coil volts, the app may be fast enough to see some wave form's.

[waltr]

A PC, Audio card, O'scope can tell you if an output is clocking which is what you need to do. First step is to check all the timing outputs.

However, as 666 said - Do Not try measuring the coil. Best to have the Coil Disconnected to check the timing chips.

Also, use AC coupling (Cap is series with line-in) and doesn't hurt to have a series resistor.