New bara with no sound. Problem ahead.

[jladre]

Try turn 2n2222a 180 degree.. bara produce sound even without coil.

[Psyborg]

I check pinout of the 2n2222 and is correct.
I have an PC based oscilloscope. Never work before with oscilloscope. Where to measure?
I'd like to have the original scheme of the baracuda from silverdog.

[Koala]

Good news 7660 survived

Do you have an oscilloscope ?

Check you have installed the 2n2222 correctly don't trust the legend on the board as some have different pinouts

[Psyborg]

Status of my nonworking bara:
baracuda is connected to 12V lead acid baterry

79l05 In=10V
out=-5V
78l05 in=12V
out= 5V

TC 7660 Between pin 8 (V+) and pin 3 (gnd)=12.6V
Between pin 3 and pin 5= -10V

LF412 Between pin 8 (V+) and pin 4 (V-) = 10V
Between pin 4 and pin 1 = 5V
Between pin 4 and pin 7 = 1.5V

NE5534 pin 4 Vcc - pin 7 Vcc+ = 10V
pin 4 Vcc- pin 7 Out = 1,43V

CD4060 pin8 - pin 16 =5V

[Koala]

measure voltage pin 5 of the 7760
and outputs of the 79L05 and 78L05
Would be a start

[Psyborg]

I built baracuda from silverdog with original parts. I turned on and nothing happens, not a sound, not a beep. I noticed that the IC 7760 very warm. So I look all components and discovered that is IC LF412 is wrong inserted. After correction the heat of 7760 is gone. But still no sound.
I use 24cm diameter magnet wire coil with 400uH, 1.3 ohm.
Is maybe now 7760 faulty? Don’t know what to do? Where to look?

Help! Please.