Build Your Digital Roulette Circuit Diagram

Description

This circuit represents a miniature digital “wheel of fortune”. It’s constructed utilizing an oscillator IC1, a counter IC2, and transistors Q1 through Q8 which control the display, a common cathode DSP1. Power is supplied primarily through a 9V battery, but can also originate from an external power supply. Frequency regulation is achieved through a combination of potentiometer TR1 with capacitor C1, allowing for adjustment of the capacitance, and consequently, the oscillator’s frequency. Higher frequencies result in a faster "rolling" of the indicator on the display. Utilizing TR2, the duration of the measurement and subsequent release of S1 is modified. The S2 button initiates a reset of the display. When S1 is pressed, the circuit commences operation simultaneously triggering a reset. Upon releasing S1, the meter halts at a numerical value. To restart the game cycle, S1 must be pressed again, or the display can be reset using S2, resulting in a zero reading and offering the player the opportunity to claim all accumulated “profits.” The game accommodates two to nine players. TR1 and TR2 can be implemented as trimmer potentiometers, configurable to suit specific needs.

IC1 - 4011

The 4011 is a versatile quad timer IC. In this circuit, it serves as the oscillator and counter, providing the timing and counting functionality necessary for the digital “wheel of fortune” game. Its integrated timer circuits allow for precise control of the display updates and the overall game cycle.

IC2 - 4026

The 4026 is a versatile digital delay/pulse stretcher. In this circuit, it serves as the counter, providing the counting functionality necessary for the digital “wheel of fortune” game. Its integrated timer circuits allow for precise control of the display updates and the overall game cycle.

Circuit diagram

Part list