Four-digit seven-segment indicator for 8 bit values

Rev C August 2019

• Reverse input protection
• Real decimal mode w/four digits
• Configurable modes via jumpers:
  • Decimal / HEX mode
    • Signed Decimal (-256-255)
    • Unsigned Decimal (0-255)
    • Hexadecimal (0-FF)
  • Latch mode
    • Latch value on L->H transition
    • Latch value on H->L transition
    • Unlatched (live display)

Note: This revision was produced and works

Rev B August 2019

• Added programming header
• Removed dim mode

Note: Never produced

Rev A July 2019

• ATmega328P microcontroller running at 8MHz (internal clock)
• 2 digit 7-segment display
• Configurable modes via solder jumper:
  • HEX mode (default)
    • 00-FF
  • Pseudo-decimal
    • 00-99, .00-.99, ..00-..55 (dot = 100)
• Unlatched (live display)

Images

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Schematics (pdf)

• Complete schematics

PCB Images (svg)

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