# gym agility simple strategy

Posted on Feb 5, 2014

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 push-button which, when pressed, lights up the corresponding LED. The aim of the game is for a player to illuminate all four of their LEDs in a row, in which

case the circuit declares a winner. However, there is a catch. As soon as you light one of your own LEDs, the other player`s corresponding LED goes out - and vice versa. The game begins by giving each player two illuminated LEDs. Consider now that this game is scaled up and used in a gym. If the LEDs in the circuit are directly replaced with N-channel power MOSFETs, then 12V globes can be illuminated (a MOSFET`s gate is wired in place of a LED`s anode, the source goes to negative, and the load is wired between the drain and positive). If four large push-buttons are mounted on one wall and four on another, this could become a game of agility - if not a physical tussle to keep the other player away from critical push-buttons. Schmitt NAND gate IC1a and IC1b (4093) form a simple bistable latch. When one output (pin 3) goes "high", the other output (pin 4) goes "low" and vice versa. The main advantage of using a bistable latch (as opposed to a flipflop) is that it does not suffer from switch bounce. Four such bistable latches are fed to inputs A-D of IC2. However, for the sake of simplicity, only one of these is shown; ie, IC1a-IC1b. We now need to identify when all four bistable latches go either "high" or "low". This is done using IC2, a 4067 16-channel multiplexer. When inputs A-D are all "low" (binary 0000), this opens decimal channel 0. Conversely, when all are "high" (binary 1111), this opens decimal channel 15. Channels...

Leave Comment

characters left:

• ## New Circuits

.

Popular Circuits

LED Dice circuit
3-30V 3A Adjustable Regulated DC Power Supply
am transmitter circuits
Argon/Krypton Ion Lasers
op amp Why does this current limiter circuit oscillate
universal high resistance voltmeter
Digital Bike Tachometer Circuit
Telephone privacy circuit
Odd application of neon glow lamps
Build an Experimenters Power Supply
Low Cost Burglar Alarm For Boats
How to Measure Analog Distance Sensor
Circuit RF Amplifier
Two electric motors has started manual and automatic control circuit
Intelligent sensor signal processor configured MAX1463 precision pressure detection circuit
LM4561 LM4562 consisting of 170W power amplifier circuit

Top