I've made this PCB with the ATmega328p-AU. In case the chip is brand new and doesn't have bootloader, learn here how to burn it with Arduino IDE and an Arduino NANO with ISP code.

• burn
• bootloader
• Atmega328
• Arduino NANO
• how to

Working on VFD clock using standalone atmega328, SN74HC138N (3 to 8 line demultiplexer), CD4026BE (7 segment display driver) and a bunch of transistors. The idea is to switch different grids using demultiplexers, each of them is 3 to 8 line demux and I will wire them in series so they will be 4 t... view more

• Atmega328
• CD4026BE
• BC557C
• VFD
• NE555