Don Froula

[Don Froula @donf99]

@RonRosenbaum1 Amazing film and cast. An even better book!I just re-watched for the first time in years. Anthony Quinn was great. Richard Harris was there for a few minutes. Also, the obligatory teen idol appearance of Jimmy Darren. He or Fabian seemed to pop up regularly in films of the era.

[Don Froula @donf99]

Can a Cap'n Crunch whistle really seize a telephone trunk and make a free call? #captaincrunch #johndraper #crunchman #bluebox #phreak #phonephreaking @ronrosenbaum #esquiremagazine

https://t.co/Ky6JVDCRTy

[Don Froula @donf99]

Two working replicas of the "Al Gilbertson" blue box, described in the October 1971 issue of Esquire magazine by author Ron Rosenbaum. #phonephreak #phreaking #telephone #hacking #esquiremagazine @RonRosenbaum1

[Don Froula @donf99]

@RonRosenbaum1 Can't beat Angela Lansbury in the original, but the remake is pretty good.

[Don Froula @donf99]

I finally repaired the backend server of my "Hotbits" true random number generator/server. It uses a Geiger counter and Americium source from an old household smoke detector. https://t.co/P2VayT9RPA #randomnumber #cryptography #randomness #radioactivedecay @Fourmilab

[Don Froula @donf99]

POTS phone line coupler. Couples 8 ohm audio output source to 600 ohm phone line. The phone line side has a 0.47uF DC blocking cap to avoid saturating the tiny Radio Shack 273-1380 transformer. Zener diodes protect the audio source from ringing. #telephone #phonephreak #bluebox

[Don Froula @donf99]

November 1960 Bell System Technical Journal - The issue that gave away the secret of controlling Ma Bell’s long distance network to early phone phreaks, like Ralph Barclay. #phonephreak #hacking #hackers #2600 #telephone #bluebox #stevewozniak #ronrosenbaum

[Don Froula @donf99]

@textfiles Perhaps add the Dutch Hack-Tic magazine archives, Google-translated?

[Don Froula @donf99]

@kr4shk4t Did it work? I know it did with the earlier model.

[Don Froula @donf99]

Arduino-based telephone switch “tone plant” generates 16 modern and vintage telephone switch tones and 16 cadences that may be applied to any tone. Relay allows interrupting power ring at any selected cadence. #telephone #telephoneswitch #vintagetelephone #telephonesounds

[Don Froula @donf99]

Re-created this Dutch Hack-Tic “Demon Dialer” phone phreaking tone box from the early 90s using the long-elusive source code and vintage microcontroller. #telephone #phonephreak #phreaking #hacktic

[Don Froula @donf99]

@museumofcomm Does the machine produce a modulated waveform, as compared to a simple mixing of frequencies? I’m curious which two frequencies are generated. 420x40? 500x40? Very neat. I recall seeing the old, damaged unit on a visit.

[Don Froula @donf99]

@ExplodeThePhone I did exactly that on my last visit around 2009! Great space.

[Don Froula @donf99]

@museumofcomm @ExplodeThePhone I have one too! Nice unit.

[Don Froula @donf99]

@ExplodeThePhone After decades, I finally located the source code for the Hack-Tic “Demon Dialer” Rainbow Box of the early 1990s. I managed to get the cross assembler functioning, as well as the old 68HC705C8 programmer and build one. https://t.co/UuLGkt3qw8

[Don Froula @donf99]

@mattburrough Also, check out: https://t.co/K3yyoadwdg and https://t.co/jlXc8BunuJ

[Don Froula @donf99]

@mattburrough I located the original Demon Dialer code author. He sent me the long-lost source code. I had the ancient MSDOS cross-assembler and Motorola programmer and created a tube of working chips and a brand new Demon Dialer: https://t.co/UuLGkt3qw8

[Don Froula @donf99]

#photochat Old Princess phone with cover off, shot on a 4x5 Graflex with 120 roll film back in expired film from 1958.

[Don Froula @donf99]

#PhotoChat Plenty of photography project here at home to keep me busy. Fortunately, have a good supply of darkroom chems, film, and paper!

[Don Froula @donf99]

Good afternoon!

[Don Froula @donf99]

#photochat Don here, in the Chicago area. First timer.