Tag Archives: 4093

Gym Agility: A Simple Strategy Game

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This simple circuit is a two-person game of strategy and speed – and potentially, agility and athletic fitness. Each player has a row of four LEDs before him/her. Beside each LED, there is a pushbutton which, when pressed, lights up the corresponding LED. The aim of the game is for… Read more »

Time Switch

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This circuit is especially designed for those who often need to wake up early in the morning. Ordinary alarms in electronic watches are not loud enough and very often they fail to wake up. The switch circuit described here will come handy; it can be used to switch on a… Read more »

X9CMME Digital Potentiometer Circuit

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Xicor’s digitally controlled E²POT ICs provide ergonomic and long-lasting alternatives to mechanical potentiometers. The ICs in the X9CMME series have a 7-bit counter with reversible count direction and a decoder that enables one of the 100 analogue switches. The outputs of the analogue switches serve as the wiper of a… Read more »

Door Sensor Circuit

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This compact and affordable door sensor mechanism uses a Hall-effect sensor fixed at the corner of the door frame and a standard bar magnet fixed on the door panel close to the Hall-effect sensor. When the door is opened, the magnet moves away from the sensor to generate a wake-up… Read more »