Carlson's Super Probe

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Introduction: Carlson's Super Probe

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. Except for the amplifier. I added some diodes to lower the voltage, if you are using alkaline batteries instead rechargeable. Alkaline batterie are 1.5v. Nica or nimh are 1.2 only. The amp chip 4871 need a MAX of 5.5V. So add diode lower the voltage by 0,6v each.

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

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Pot 100k

CT6EX104-ND CT6EX104

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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

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diode

1N5711WS-FDICT-ND

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Transistor 3904 sot23

MMBT3904LT3GOSCT-ND

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

CM683-ND

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Amplifier chip

LM4871MX/NOPBCT-ND

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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.

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. No jumper at all.

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!

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4 Comments

great job looks fantastic, gotta love Mr. Carlson's Lab :)

what does it do?

It's an sensitive noise amplifier probe. It can catch wire noise without touch the wire itself. Look at the video for more detail and exemple :)