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Parallel port dongle (12C508A) By using the PIC 12C508 MCU from Microchip, we can make a cheap and simple hardware protection key (dongle).

    
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Parallel port dongle (12C508A) By using the PIC 12C508 MCU from Microchip, we can make a cheap and simple hardware protection key (dongle).

[ Parallel port dongle (12C508A) By using the PIC 12C508 MCU from Microchip, we can make a cheap and simple hardware protection key (dongle). ]

Источник: Fumil's digital stuff




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Также предлагаем просмотреть другие схемы, содержащие в назании одно или несколько слов из данной схемы:

Pic24C programmer. Pic 16C/F84 ,24Cxx and 12C508 Combi programmer. Full mouse support, user friendly interface with pulldown menu, HEX save, Bin save, all popular programming interfaces supported PicBust option

24 Line Parallel Interface for the PC (15k) - only schematic

The Audio Note Conquest 300B parallel single ended power amplifier

Audio-video switch. This is an 8-input x-output audio/video switch module to be controlled from a computer, for example from the parallel port.

Speaker Microphone Circuit- allows you to use a cheap loudspeaker as a microphone.

Parallel port dongle (12C508A) By using the PIC 12C508 MCU from Microchip, we can make a cheap and simple hardware protection key (dongle).

Dongle -serial port (12C508A) This device is NOT a professional dongle. You can use it to protect your software , but you must agree with its major disadvantage: it needs one of the COM ports on your PC. The advantages are the low cost and simplicity.

Smart lock (12C508A). The base sends a data sequency (the password) which is recognized by the key. The key checks the sequency and -if it recognises it -sends to the base another data sequency, as an answer to the password. At the time when the base gets a correct answer (which means that the key has been introduced), the relay is put into action, and it can command a number of consummers.

Dynamic lights (12C508A) (Christmas)

Cheap 40KHz clock
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