Time relay, 0-99 min

Time relay based on PIC12C508.
Dual 7-segment indicator for showing the remaining time.
Two push buttons for setting relay operation time /NC and NO contacts/
B1 for the first digit, B2 for the second digit

When relay is off, the LDD is 00
Progarmming 7 minutes delay (example):  push B1 7 times, wait for 10sec for switchin the relay on and starting countdown
Progarmming 59 minutes delay (example): push B1 5 times, B2 nine times
Resetting with same buttons
LED blink when the unit is ON
Power suplly: 9-12V