Listen to sounds from electromagnetic fields with this Electronic ear. Sluch = Ears in Slovak.
The device allows to discover the sonic worlds of electromagnetic fields. Listen to the electromagnetic fields from the various devices like PCs, mobile phones, cameras etc.
The project appeared in MAKE: MAGAZINE in an article titled:"Weekend Project: Listen to Weird Sounds from Electromagnetic Fields". The article provides the instructions to buil the device on a Perfboard. I created a PCB version and I am making it available here.
See it in action in this video: https://youtu.be/9AdUj3FRL2c
GET STARTED:
To make the "Ear" you will need a Breadboard or Perfboard or print the PCB file (in the latest version) or have the PCB printed for you. The PCB file in the "Fritzing" format is called "Sluch YYYY-MM-DD.fzz. Open it in "Fritzing" (download the SW from https://fritzing.org/) to first check it, modify it as you wish and then have it printed by a PCB printing service of your choice, such as AISLER (https://aisler.net/) in Germany. The file "gerber-files .zip" contains the files required to make the same PCB but in Gerber (Extended Gerber RS-274X) format. Gerber files can printed by a PCB printing service of your choice, such as JLCPCP (https://jlcpcb.com/) in Honk Kong, China or OSHPark (https://oshpark.com) in the U.S., just for example.
You will need the componets listed below if you are soldering.
PARTS:
1pc - Stereo jack - PRT-08032 RoHS
HALJIA Stereo-Buchse für Leiterplatte, für Kopfhörer, Audio-Verbinder, 20 Stück, 3,5 mm, 5 Pins, DIP, PCB, Buchse
@ https://www.amazon.de/-/en/silver-colours/dp/B07422MCSX/ref=psdc_571760_t3_B07L3P93ZD
3.5mm PCB Mountable 5 Pins Stereo Female Audio Jack Socket
@ https://arduino-projects4u.com/s/dcf77-msf60/
1pc - prototyping PCB
4pcs - 2.2uF or 1.5uF (Metalised Polyester Capacitor)
2pcs - 1kOhm Resistor
2pcs - 390kOhm Resistor
2pcs - 22mH Inductor
1pc - OPA2134PA-ND Integrated circuit
4x 8-Pin High Audio Operational Amplifier OPA2134PA for Integrators Crossover Networks Multimedia Audio 20 Volt 18 Volt
@ https://www.amazon.de/-/en/gp/product/B0C5CTNBF3/ref=ox_sc_act_title_2?smid=A1YGM623B7CCLI&psc=1
1pc - 9V battery snap
2pcs - 100uF (Electrolytic Capacitor) = 0.1 mF
2pcs - 100k Resistor
1pc - Res
1pc - Green LED
1pc - 9V battery snap
1pc - stereo headphones
NOTES ON AUDIO:
PIN1 S Sleeve GND goes to Virtual Ground PIN5 R Right RNG goes to C3 PIN2 T Left TIP goes to C4
PIN4 RSH: Ring shunt. When there's no plug in the jack, RSH is connected to RNG - Not used here, for future uses PIN3 TSH: Tip shunt. When there's no plug in the jack, TSH is connected to TIP - Not used here, for future uses
NOTES ON MAKING:
There is no on/off switch. If desired place it in between the connection from the battery and the rest of the circuit.
SOURCES:
https://makezine.com/projects/weekend-project-sample-weird-sounds-electromagnetic-fields/ https://makezine.com/author/jonas_gruska https://www.youtube.com/watch?v=rrDtBW1FyJo
LICENSE:
I quote from the source: "Elektrosluch is an open-source device for electromagnetic listening", by Jonas Gruska. So I licence it accordingly:
This work is dedicated to the public domain.