![PCB Recycling: The Core of Your Electronics Is More Valuable Than You Think - Open Electronics - Open Electronics PCB Recycling: The Core of Your Electronics Is More Valuable Than You Think - Open Electronics - Open Electronics](https://www.open-electronics.org/wp-content/uploads/2015/02/circuit-board.jpg)
PCB Recycling: The Core of Your Electronics Is More Valuable Than You Think - Open Electronics - Open Electronics
![Can anyone tell me what do "MF" and "DN" stand for on a pcb like this one? I know that CN means capacitor NETWORK, would DN mean diode NETWORK by any chance? Can anyone tell me what do "MF" and "DN" stand for on a pcb like this one? I know that CN means capacitor NETWORK, would DN mean diode NETWORK by any chance?](https://preview.redd.it/1fexyf5761o61.jpg?width=640&crop=smart&auto=webp&s=f17cb8d6bd1fa4b36b0b8e4ea729238499e00d0c)
Can anyone tell me what do "MF" and "DN" stand for on a pcb like this one? I know that CN means capacitor NETWORK, would DN mean diode NETWORK by any chance?
![What does mean E in a PCB component designation?I have some black components with E3, E6 and E7. I know that R are for resistor, Q transistors, L coils, but E, what What does mean E in a PCB component designation?I have some black components with E3, E6 and E7. I know that R are for resistor, Q transistors, L coils, but E, what](https://preview.redd.it/phkcxeqc49991.jpg?auto=webp&s=7d16e4da66915e6c7d8653ab8034fbc2bb01e6dc)