ECG amplifier board and PCB in altium designer format USB Interface, PIC18F4550 Microcontroller, Right-Leg Drive Circuit and Ready for Optical Isolation. Operates with 2 x 9 V batteries. Important: Do not use this circuit with any other DC or A

蓄电池充电器电路，包含原理图和PCB图，很经典，值得使用-Battery charger circuit, including schematic and PCB diagram, classic, worthy of use

Dual Power Supply Single 9V Battery : Copied a Japaneese unidetified PCB Dump yard...Good one and its working 100 .-Dual Power Supply Single 9V Battery : Copied a Japaneese unidetified PCB Dump yard...Good one and its working 100 .