It did pshiiit with a little smoke : help me for a surf pi 1.2 kit

[Skippy]

Quote:"No, I use solder with lead."
That's good. Now you need to learn to complete the joint before all the flux has boiled away. Without flux, your joints will be rubbish.

Diode D6 is not needed for the circuit to work. It is 100% there in case you incorrectly wire the entire circuit up wrongly. With the power applied correctly, it passes no electricity, and does nothing.
Do you have access to electronics scrap ? Most of us have a mountain of it - TV, HiFi, CD, computer, industrial equipment, etc. You should be able to find a suitable equivalent to the 1N4001 easily. Likely places include power-supply circuitry. Anything 1N4001, 4002, 4003 .... 4007 will be fine.

[Gamike]

ok, je regarde dans mon petit stock de d?butant ...

[Qiaozhi]

ok, je regarde dans mon petit stock de d?butant ...

Please read the forum rules -> Basic Rules of the Forums
and make your posts in English.

[Skippy]

Zut Alors ... He said "OK" , that's English, then something about his grandmothers horse being struck by lightning.

[Qiaozhi]

Zut Alors ... He said "OK" , that's English, then something about his grandmothers horse being struck by lightning.

I understand what he said (apart from the last word) and it wasn't that.

[Skippy]

My mistake, it's Yak, not Horse.

... or if you force me to translate sensibly, he said " ..... small beginners stock".

I didn't have a beginners stash for long, there was a government surplus store in my city, and one time they were closing down a storage yard, and my dad and I filled his car up with stuff for 7 Pounds ( about 10 US dollars ) this was 1980 I think.

[Gamike]

Hello,
Well, not better.
I redid all the bad welds, rechecked the battery poles, changed the diode with a found (1n4004) and tested again. I roasted the diode again. I do not understand why. I send you the pictures, I really need your help.
Thank you so much.
Here (http://www.adrianandgenese.com/blogg...rom-a-diy-kit/) is the assembly principle with the electronic schema.
Maybe you can find why I am so bored.

PS : My grandmother had a pig, rabbits, chicken and cow but no horse...

[Skippy]

You are just showing us the PCB. The error you are making is likely to be in the wiring to to your battery ? or Power supply ?
If you're using a battery, then you have no current limit, 20 Amps is possible. So insert a series resistor of 10 Ohms or 22 Ohms or whatever you can find in your debutante junk collection. Make sure it's high power.
If you have a voltmeter / multimeter, now is the time to use it to see why the voltages you would expect to find are not correct.

[waltr]

You are just showing us the PCB. The error you are making is likely to be in the wiring to to your battery ? or Power supply ?
If you're using a battery, then you have no current limit, 20 Amps is possible. So insert a series resistor of 10 Ohms or 22 Ohms or whatever you can find in your debutante junk collection. Make sure it's high power.
If you have a voltmeter / multimeter, now is the time to use it to see why the voltages you would expect to find are not correct.

An even better way to current limit is put a 20-40Watt light bulb in series with the battery. An automotive tail light bulb (filament not LED) work well.
When using batteries that have a high current output a limiter is a MUST and will pay for itself the first time you connect something wrong and the bulb lights up preventing smoke in your circuit.

[bklein]

Remove socketed IC’s, then test the board again for current draw. Put a meter in series and tell us the current.

[Skippy]

Tell us the current ? No, please don't, because the answer is clearly 5 Amps plus.
It seems pretty evident the power has been applied the wrong way round. Twice. He needs to seriously study his wiring to the battery.

[bklein]

Yeah you’re right. Got to have power backwards if that diode heats up.(twice eh?)
Don’t the instructions say to power without the IC’s first though?

[nonkapo]

Monamour, can you please show us where exactly you connect positive and negative of the battery? There is a capacitor near the power socket which can confuse you which is the positive. Do as Skippy tels you, show us how you connect the battery/power supply.

[Gamike]

Hello people

After research, I found my problem and now it's okay. I check the tension as it says in a post on http://treasurehunters.co.za/forums, and it's good. But when I connect, there is no sound. When I check the voltage across the coil, I have nothing. no current. Can you help me ? an idea ?
Apr?s de nombreuses recherches, j'ai trouv? mon probl?me et maintenant ?a va. Je v?rifie la tension comme il est dit dans un autre post, sur CI, et c'est bien. Mais quand je me connecte, il n'y a pas de son. Quand je v?rifie la tension ? travers la bobine, je n'ai rien. aucun courant. Pouvez-vous m'aider ? une id?e ?

[Skippy]

" I found my problem"
Are you going to tell us what you did, or do we have to guess ?
If you have applied the battery power reversed, AND you've destroyed the protection diode, then that means you have applied 12 Volts the wrong way round to the entire circuit. Which could easily destroy most of the Integrated Circuits on the board, and maybe some other parts too, like Q2, all bad news.

Remove all the socketed IC's, just have U5 fitted. Check if you have a 5 Volt power supply. Then fit U6, and see if you've got a negative 5V supply. Then fit U1 and see if it is still pulsing.