Abstract: Timing adjustment for accurate zero-crossing determination includes obtaining time offset(s) representing amounts of time between (i) zero-crossings of an input signal waveform, representative of an input AC waveform, input to a zero-crossing detector circuit and (ii) corresponding transitions of an output signal from an output of the circuit to a microcontroller, and determining times of the zero-crossings of the input AC waveform, which includes determining times of the corresponding transitions as detected by the microcontroller and adjusting the determined times using the time offset(s) to produce the times of the zero-crossings of the input AC waveform. In another aspect, input AC frequency is determined by determining pulse width(s) of pulse(s) of the output signal, and adjusting a half-cycle time corresponding to the pulse width(s) using the time offset(s) to provide a duration of half-cycles of the input AC waveform and inform a frequency of the input AC waveform.

Abstract: A lottery instant win game card simulating a Hold'Em Poker styled card game with multiple chances of winning for a player. The instant game card includes at least two sets of player hands and at least two sets of opponent hands, with at least two sets of community cards, and at least two prizes. The player can combine one set of the player hands with either set of community cards to form a strongest hand for that set of player hands. The strongest player hand is compared against the strongest opponent hand. If the player wins, the player wins the prize associated with that winning player hand.

Abstract: Interactive games provide a player with an opportunity to use skill and knowledge of conventional game strategy to facilitate greater player interest. The games described herein include simulated versions of blackjack, draw poker, hold'em, pick seven and roulette which are playable on video display terminals, scratch-off cards or pull tab cards interchangeably. Each casino game described herein has been modified for use with the card and video format to provide a simulated game which incorporates the strategy of the related casino game.

Abstract: Interactive games provide a player with an opportunity to use skill and knowledge of conventional game strategy to facilitate greater player interest. The games described herein include simulated versions of blackjack, draw poker, hold'em, pick seven and roulette which are playable on video display terminals, scratch-off cards or pull tab cards interchangeably. Each casino game described herein has been modified for use with the card and video format to provide a simulated game which incorporates the strategy of the related casino game.

Abstract: An instant poker game card having portions thereof covered with a removable scratch-off coating, which when removed, reveals symbols indicating the cards of a poker hand. The card also includes other scratch-off portions which indicate possible combinations which can be kept from the initial starting hand which allows a player to draw any number of additional cards in an effort to improve the rankings of the final hand. The result of the game is judged according to the normal poker rankings of one pair, two pair, three of a kind, straight, flush, full house, four of a kind, straight flush, and royal flush.