📣📪 🚚 Adafruit will not be shipping USPS orders Monday January 20, 2020 🗓. Expedited USPS orders placed after 11am ET 🕚 Friday January 17 will go out Tuesday January 21 📣📪🚚
0

Electromagnetic Field (EMF) finder (DIY bug detector)

3230858319 99F9279906 B
Electromagnetic Field (EMF) finder

This is very simple EMF detector. Modified (by Melih Karakelle) from here. Two Schottky diode (BAR10, 1N5711, etc.) for rectifier, an Op-Amp (LM10), a cap (100 nF), a resistor (1 Mohm), triger level adjust trimpot (220 Kohm), a driver transistor (BC550). Operated with 3 V battery (2 x AA). Very simple and working good. Can detect/find a cell phone (GSM) about 30-50 cm (when RF propagation), electricity cable (on load), tv/monitor etc…


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 15,000+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

What do you want from CircuitPython in 2020?

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7:30pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Apple’s Mac Pro doesn’t fall far from the tree

Wearables — How to twist light

Electronics — Linear Love

Biohacking — Vitamin-C + Gelatin for Accelerated Recovery

Python for Microcontrollers — CircuitPython snakes its way to Teensy 4.0, i.MX Feathers take flight and more! #Python #Adafruit #CircuitPython @circuitpython @micropython @ThePSF @Adafruit

Adafruit IoT Monthly — Learning from IoT Projects, Adafruit Joins the LoRa Alliance, Ring Ransoms, and more!

Microsoft MakeCode — MakeCode: Opening a World of Possibilities

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



6 Comments

  1. Yes! This is EXACTLY what I’ve been wanting to get/make for AGES! Thanks for posting this!

  2. Can this detect CDMA phone transmissions, too?

  3. Nice, you should definitely make a kit for this!!

  4. I would love a tutorial for this!

  5. If you set up a camera on a tripod and use long exposure or image compositing techniques, you can get an really cool effect by moving the sensor all over a room. You’ll end up with a visualization of the fields in the whole room.

  6. “Can this detect CDMA phone transmissions, too?”

    Yeah, if you place the device next to (12-18 inches) the antenna of the phone while it’s ringing or during a call. Any amplification would lead to unlimited false positives.

Sorry, the comment form is closed at this time.