Cigarette pack cellphone jammer

[flickr 198384190 ]

At HOPE I got to look at a cell-phone jammer owned by a friend. This one is interesting because 1) its extremely well designed 2) it’s very small and 3) it actually has a PLL instead of just being open-loop controlled. The entire package fits into a pack of cigarettes.

(For more disassembly photos & comments…)

[flickr 198384118 ]

The design is made of 3 PCBs bolted together.

[flickr 198384044 ]

The silkscreened cover is also the microstripline antenna for the two VCOs

[flickr 198383962 ]
The battery is a large LiIon, there’s a protection circuit that looks like it was removed from something else and soldered on. And a somewhat questionable LM317 charger. I’d only trust a 317 for a lead acid, but I guess if you’ve got a protection circuit the worst is just that you’ll reduce the battery life

[flickr 198383843 ]

I didn’t get too much time with it so I just took photos of the disassembly. Looks like there’s some boost converters, 2 PLLs (16-TSSOP parts), a micro to control them, and the VCOs. A very nice design! And I like the idea fitting it into a cigarette pack.

Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here:

Join Adafruit on Mastodon

Adafruit is on Mastodon, join in!

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, 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.

Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm 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!

Join over 36,000+ makers on Adafruit’s Discord channels and be part of the community!

CircuitPython – The easiest way to program microcontrollers –

Maker Business — “Packaging” chips in the US

Wearables — Enclosures help fight body humidity in costumes

Electronics — Transformers: More than meets the eye!

Python for Microcontrollers — Python on Microcontrollers Newsletter: Silicon Labs introduces CircuitPython support, and more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi

Adafruit IoT Monthly — Guardian Robot, Weather-wise Umbrella Stand, and more!

Microsoft MakeCode — MakeCode Thank You!

EYE on NPI — Maxim’s Himalaya uSLIC Step-Down Power Module #EyeOnNPI @maximintegrated @digikey

New Products – Adafruit Industries – Makers, hackers, artists, designers and engineers! — #NewProds 7/19/23 Feat. Adafruit Matrix Portal S3 CircuitPython Powered Internet Display!

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


  1. Hello!
    It’s funny kit.
    I want a make this Kit, But I don’t know how to buy or get a kit..
    Please tell me how to make or buy.

  2. This is very cool, and I’m even interested in making the thing (even with the SMT soldering required! it would give me good practice)

    however, the concept of having it fit in a cigarette pack: I just want to warn (as I’m sure you know) that since this doesn’t even attempt o meet FCC safety guidelines (in fact, it’s designed to break FCC RF guidelines!) I’d NEVER put this in my pocket running. It is cool that you could have an innocuous altoid tin sitting in the seat next to you in the movie theater or on the counter at your favourite restaurant, but I’d just like to caution against putting unregulated, high-power RF devices right next to your reproductive organs! (paranoia? who knows!)

    anyway, nice stuff.

  3. Cool, but I think this type is better – it has no long rubber antenna and looks like a mobile: – it seems to be the smallest and most realistic one ive seen yet.

  4. LambdaUmoja, if you’re going to advertise your products here you should at least spam the right post! This jammer doesn’t have external antennas! 😉

  5. Hi everyone,


    I am a member of a Tactical paintball team in Ontario Canada and would like an RF Jammer that would block the signals from a basic hand held radio or throat mic.

    Any suggestions LadyADA?..anyone?

    Looking forward to hearing from you,


Sorry, the comment form is closed at this time.