This TTL dice is from an old publication from 1978, but it can still be assembled, as the components are common. The LEDs are mounted in an arrangement like to the face of a die and when pressing and releasing PB1 a number is drawn. The circuit must be supplied with 5 V and not 6 V as indicated, as it is a TTL circuit. A 6 V supply with a 1N4002 diode in series can be used to reduce the supply to 5.4 V, which is accepted by TTL circuits.
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