pistol dch

[Pahom]

hello everyone. I was playing again with the receiver circuit with the 741 and I couldn't help myself I took the screwdriver and turned the trimmer again and it was flashing again I tried it many times and it always flashes. Am I breaking a component??? I also checked the circuit and saw that I had connected pin 4 of the 741 to the output of the 1MΩ trimmer. Now I fixed it at -9 volts. It flashes and so on when I turn the trimmer. What does the trimmer adjust in the circuit??

What scheme do you use?

[Zicos]

the circuit used now is this.

[Zicos]

This

[Zicos]

now I have completely removed the 741 circuit and it works the same as before and better... conclusion,,,,the 741 circuit was not working because pin 4 was not connected correctly. now that it is connected correctly it still does not work. maybe the chip is broken. what does the 741 circuit do as a function in the entire circuit ??????

[Pahom]

the circuit used now is this.

I did it with one transistor at the input of the tda7000, there are problems with this circuit. By the way, look at the beginning of the first page of the 5th post in the kind of hum hum I did according to this scheme and everything worked.

[Pahom]

now I have completely removed the 741 circuit and it works the same as before and better... conclusion,,,,the 741 circuit was not working because pin 4 was not connected correctly. now that it is connected correctly it still does not work. maybe the chip is broken. what does the 741 circuit do as a function in the entire circuit ??????

Well, it's a microvoltmeter of its kind.

[Pahom]

still, yes, you burned down the lm 741, your resistor is glowing, it does not glow, it dies in the wake of the microcircuit

[Zicos]

I will put a resistor before the trimmer for protection. I will change 741 and see if I will also change the circuit.

[Dubulumach]

static

[Geo]

As i remeber frequency of stimulator is near to 1Khz

[Zicos]

static

how many volts should I measure on the 741 on pin 3 on pin 2 and on pin 6???

[abdou2014]

The DCH must capture short electromagnetic waves or static and you can confirm this with an electrical switch. it's very easy project , i built a circuit better than this, the TDA output is like white noise for hear any peak

[abdou2014]

there is nothing hard, almost all the diagrams are drawn by other engineers with no relation with LRLs, and some members made small modifications that's all,

[Pahom]

there is nothing hard, almost all the diagrams are drawn by other engineers with no relation with LRLs, and some members made small modifications that's all,

Of course, it's not a problem to make it from scratch if you understand the principle.It's confusing and full of mistakes on purpose.Franco Italy's only open-source project. Even then , not many people brought it to a working sample .It seems to have all the data and the author helps.

[Dubulumach]

Of course, it's not a problem to make it from scratch if you understand the principle.It's confusing and full of mistakes on purpose.Franco Italy's only open-source project. Even then , not many people brought it to a working sample .It seems to have all the data and the author helps.

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