Electronic prize winning machine circuit

Circuit working principle: This circuit consists of two ICs. IC1 constitutes a pulse source, because
it is powered by C1 after the key switch S is turned on momentarily to charge the capacitor C1,
so the pulse source composed of IC 1 only oscillates for a while (more than ten seconds) and then stops. But
its oscillation frequency is high first and then low. In this way
, the ten LEDs driven by the pulse counting, decoding and display driver composed of IC2 will also flash quickly, then slowly and then stop with the pulse output by IC2 .