circuit diagram

hey i have to give a presentation about the working of microcontroller in train announcement system . i just have a block diagram which has a buzzer,rf cardreader and a voice chip interfaced to 8051...
circuit diagram

hey i have to give a presentation about the working of microcontroller in train announcement system . i just have a block diagram which has a buzzer,rf cardreader and a voice chip interfaced to 8051...
oximeter circuit diagram

hi... i want some diagram of pulse oximeter circuit... where the best way to get this..? any advise ? thanks a lot!
oximeter circuit diagram

hi... i want some diagram of pulse oximeter circuit... where the best way to get this..? any advise ? thanks a lot!
Atmel ISP Cable circuit diagram

I want the circuit diagram of the ISP cable that works with Atmels "Microcontroller ISP Software".