New bara with no sound. Problem ahead.

[Koala]

Check the value of the resistor bottom right near the h in the word threshold just above the capacitor I have a different value there but the board is slightly different

[localbug]

Where's the threshold pot??

[Koala]

Check the value of the resistor bottom right near the h in the word threshold just above the capacitor I have a different value there but the board is slightly different

ignore this I have use a 4 band your is correct can't see anything obvious with the components that are lying flat to the board

[Psyborg]

Threshold pot is on the place.

[Koala]

Have you got a small speaker you can try instead of the buzzer I do remember someone having a problem with the buzzer recently.

[Psyborg]

I can try tomorrow morning put a speaker instead of a buzzer.
Must be at the exit of the coil some voltage ?

[Koala]

I can try tomorrow morning put a speaker instead of a buzzer.
Must be at the exit of the coil some voltage ?

Yes but very high and short pulse so need a scope to measure it. Not sure if your PC scope is safe don't want to blow up your scope or PC. If its pulsing the IRF top left on your board will be getting warm but not hot.

Try and get mine back up and running. Nicked some parts including the Pot and coil off it for a repair for someone. When it's back running I can post some of my values for you. Probably be a few days

[localbug]

Before u make this project better look at these:
-Check the value of the resistor, more precise better. Use multimeter, dont trust the color band.
-Check the diode.
-Read the datasheet. TC7660 input voltage 10.5V, some transistors can be replaced wth others but read before the datasheet.
-Buy extra components will help alot. extra 7660, TIP127/IRF9640, Op Amp, CD40106, and Transistor
-Read the Baracuda forum and identify the issues that u might be facing. Dont forget to take a note or make a screenshoot.
-I use a headphone not 8ohm speaker.
-Start from 9V, dont start with 12V.
-2N2222 when using plastic type reverse the leg.
-Adjust the offset, pin 6 5534 should be 0V.
-Secure the bottom of the PCB, use papertape to avoid short
-400uH-450uH coil inductance works for me, resistance less than 1.5ohm wire 0.7mm

[Psyborg]

I just check all resistors and diodes, all ok.
TC7665S max input voltage is +13V. I use buzzer for now.
I will change all IC with new one when comes.

I began to be angry because baracuda does not work. Should have been easy, just solder the components and everything works.

[jladre]

I just check all resistors and diodes, all ok.
TC7665S max input voltage is +13V. I use buzzer for now.
I will change all IC with new one when comes.

I began to be angry because baracuda does not work. Should have been easy, just solder the components and everything works.

Have you check the data sheet of 7665 maybe its differ from 7660 pinouts?

[Psyborg]

I accidentally wrote 7665. It is 7660S.

[localbug]

"should have been easy" I was thinking just like you.. and I know it is frustating. take your time...build it with a clear mind and focus on the detail and steps. Succeed with the 2nd board I made. Even guru failed dont worry this is what they usually called "a learning curve"

[paku]

KOLA. its working good now im use BF245 and BF256

Psyborg
now pull out all you IC from sockets
then put you battery then turn it on
now touch all of you component with you finger
first touch you all transistor
then touch other component
fill the component have going to hot or not

sorry my bad english.

[Psyborg]

Paku
I took your advice. Nothing warms.

[Koala]

Paku
I took your advice. Nothing warms.

IRF transistor should get warm with a coil connected.