Carlson's Super Probe

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About: Hi, i'm electronic technician but it's my hobby too. I like to do and try many projects just for fun :)

Hi everyone, recently i made the "Carlson Super Probe" and i'd like to share with you how to do this!

First of all, listen Paul's video. You will see why you should build this probe, how sensitive that is. Also if you like electronic you should see Mr Carlson patreon page here: https://www.patreon.com/MrCarlsonsLab and maybe support him.

So let's begins!

Step 1: Schematics

Here are the schematics. Those are exactly the same you saw in the Mr Carlson's lab video. If you find something different, just tell me.

Step 2: ​Doing the Probe

For the probe shell, i used copper. Go to hardware store and buy those pieces. The pipe size is 4/3 inches.

Step 3: Electronics Parts

You will need some specific part. This is the digikey part number.

The little switch:

CKN9559-ND OS102011MA1QN1

-----------------------------

Pot 100k

CT6EX104-ND CT6EX104

----------------------------

capacitor 1206 22uf

478-5798-1-ND

----------------------------

capacitor 4.7uf 0603

1276-1044-1-ND

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capacitor 360pf 0603

490-1440-1-ND

----------------------------

diode

1N5711WS-FDICT-ND

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Transistor 3904 sot23

MMBT3904LT3GOSCT-ND

----------------------------

Light bulb (optional) to put on supply vr. See Video 42:00 min

CM683-ND

----------------------------

Amplifier chip

LM4871MX/NOPBCT-ND

----------------------------

And for the resistor all are 0805 resistor.

Step 4: Probe PCB

To do the pcb, just print and etch the carlson probe.pdf. Refer to the component location to solder the part. You do not need to etch a double side pcb. The bottom side is ground, except for swtich, led and one pin of the pot. Refer to the probe bottom picture.

Step 5: Make Encavure

Make an encavure and solder the pcb right in the middle. Try and adjust the size of pcb to fit in the pipe.

Step 6: Install Wire

Here i'm using a mouse cable. You can use a headphone or mic cable if you like. Keep in mind that the probe will move very often. So use an appropriate cable. You will have 3 wire coming out from this Probe. Supply, Gnd and audio.

Step 7: Put the Probe in a Shell

For now i used black tape. But i'l probably put a little machine screw or a bit of solder.

Step 8: Probe Amplifier.

The pcb is single side. You can refer to the picture as per component location. Another picture is also available below in gerber section.

Step 9: Amplifier in a Box Plus Holder

Choose an appropriate box. I took an old power supply box and some paint.

Step 10: Conclusion

This is the whole project at the end. The speaker is where the psu fan was. The probe itself is very sensitive and a must to have it. I hope you will enjoy the project. See you!

Step 11: Gerber File.

In addition, these are gerber file. You can upload those files to a pcb manufacturer. You can see the future result here: https://gerber-viewer.easyeda.com/ by uploading the file.
Those picture can be use as component location.

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    40 Discussions

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    Virgil SeaberYannick99

    Reply 3 months ago

    Then, how am I supposed to figure that out? I'm a beginner.

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    Yannick99Virgil Seaber

    Reply 25 days ago

    If you look at the picture with the gerber file, you will see where component are installed

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    DonovanP

    10 months ago

    Hi, could you please add a component sheet that corresponds with the values in the gerber files ?

    3 replies
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    Virgil SeaberDonovanP

    Reply 4 months ago

    Did you ever get hold of a component sheet for the "Gerber" Carlson Super Probe PCB's. I sure would like a copy too!

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    Yannick99Virgil Seaber

    Reply 25 days ago

    If you look at the picture with the gerber file, you will see where component are installed

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    Yannick99DonovanP

    Reply 25 days ago

    If you look at the picture with the gerber file, you will see where component are installed.

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    RiccardoC43

    11 months ago

    Thanks for help with diodes :)

    I found the 2k potentiometer with switch (audio gain) ... but can not find the 4.7k with 3 pin + 2 on the back, which is for the probe gain, right? I've never seen this kind of potentiometer

    (I have only seen now that before I used to "ask a question" instead of "post comment")

    2 replies
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    Yannick99RiccardoC43

    Reply 25 days ago

    I found that add some diode pout a feedback noise at very low volume. I removed those diode.

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    Yannick99RiccardoC43

    Reply 11 months ago

    Sorry for delay, yYou can use regular pot and add a switch beside. So 2 regular pot, one on/off switch

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    timarlop

    Question 5 weeks ago on Step 4

    Hi Yannick, thank you for sharing this.
    Carlson's video shows a different Amplifier circuit from the one you posted, the schematic you have is a later revision made by him or by you?

    3 answers
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    Yannick99timarlop

    Answer 5 weeks ago

    Different ? Where ? Supposed to be the same

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    timarlopYannick99

    Reply 5 weeks ago

    I was wrong, the circuit is the same, Sorry for my mistake.
    Only difference visible is 22uF vs 1uF capacitor on amp bypass pin 2.

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    Yannick99timarlop

    Reply 25 days ago

    Thank you, your right. This is a mistake. Probably because of the 22k resistor just below. It sould be 1uf. I'll do the correction. thank again

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    t400

    2 months ago

    If any want to sell one I will buy it

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    GCeglia

    2 months ago

    Hi Yannick, is there any suggest watt (1/4, 1/8, 1/2...) for the resistors? Thanks for your reply :)

    1 reply
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    Yannick99GCeglia

    Reply 2 months ago

    All resistors are surface mount 1/8 watt

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    JohnF555

    Question 3 months ago on Introduction

    Yannick, I did check into the gerber viewer easy eda and it appears that the circuit top diagram appeared on my monitor but one thing i noticed is that what appeared on the easy eda is different than the pdf circuit I got from paul's patreon page. Why? Am wondering if the gerber is not the super probe pcb and the pdf clearly has carlson super probe written on it. Any ideas?

    1 answer
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    Yannick99JohnF555

    Answer 3 months ago

    John, I don’t know for the transparency. Never try that before. Now, for the Paul’s gerber vs mine. It’s not the same. The schematic is the same but pcbs are not. So, t’s Normal if you are seeing differences. I did my own version of this with paul’s Schematic. That’s why