mineoro special serie 2000

[brasilpb]

They do not have no linking in the circuit.

[Bill512]

They do not have no linking in the circuit.

so, it's one of those RF related loops, which they often use in mineoro's.
Thanks for the answer brasilpb.

[Geo]

so, it's one of those RF related loops, which they often use in mineoro's.
Thanks for the answer brasilpb.

No, i"ll contact and inform you.

[gaucho1961]

Hello friends,
What chip is this with a red circle ??
Does anyone in the forum know how to identify it ??
Or give some opinion or suggestion based on the scheme of this circuit.
Thanks to all who can help me.
.

[Geo]

If you interesting to construct it, you can make an oscillator at the same frequency (555. 4011 etc) and connect it to 4k7 resistance.

[gaucho1961]

If you interesting to construct it, you can make an oscillator at the same frequency (555. 4011 etc) and connect it to 4k7 resistance.

I am grateful for the attention.
I want to try to set up and see how this detector works.
I'll try some of these ICs, I hope it works.
But also I will be waiting for someone who knows that mysterious CI may appear.
Thank you my friend.

[GOLDEN LILLY]

What is the function of the other 555?

[Geo]

There are 3x (555).
One is for audio (buzzer driver), one for battery test (i think) and the other is for coil stimulator.

[humhum]

555

Hi Geo , I think One is for audio (buzzer driver), other Two are for Stop of Stimulator Transmitter with (S) Button Controller ,(maybe will works only so like Passive Receiver).

[Geo]

Yes you have right.
With the existing values the 555 gives a pulse of 110sec and turn on the 2 transistors.
Nice observation

[Geo]

If i remember good... it is for pinpoint when the signal is very strong.
But i don't think that we will locate so strong signal with this device ...

[humhum]

Yes you have right.
With the existing values the 555 gives a pulse of 110sec and turn on the 2 transistors.
Nice observation

Geo I write Wrong for works of 555, because Coil Stimulator works only if "S" button is pres.

[humhum]

If i remember good... it is for pinpoint when the signal is very strong.
But i don't think that we will locate so strong signal with this device ...

Yes , Pinpointing olny with inside BFO circuit and with minimum sensitivity so like MD.

[humhum]

so, it's one of those RF related loops, which they often use in mineoro's.
Thanks for the answer brasilpb.

Yes, You are Right Bill about Disc. My Two Version home made Mineoro works with same logic .

[GOLDEN LILLY]

What is the receiver coil used in DCH85? Please show some pictures...