This schematic and Gerber files of PCB that is used for GSM alarm system. This is industrial-grade system with many features like 1-wire (iButton) interface, additional interface for video camera (UART JPEG camera is used), SD card to store pictures

electric lock with ibutton and master key

iButton or OneWire functions for Microchip PIC24 dsPIC30 dsPIC-iButton or OneWire functions for Microchip PIC24 dsPIC30 dsPIC33

What is it? • Protocol: to digitally communicate over twisted-pair cable with 1-Wire components over a 1-Wire network • network is defined with an open-drain (wired-AND) master/slave multidrop architecture with resistor pull-up to a n