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Game Show Who's First Indicator Lights - The circuit above turns on a light corresponding to the first of several buttons pressed in a "Who's First" game. Three stages are shown but the circuit can be extended to include any number of buttons and lamps. Three SCRs (silicon controlled rectifiers) are connected with a common cathode resistor (50 ohm) so that when any SCR conducts, the voltage on the cathodes will rise about 7 volts above the voltage at the junction of the 51K and 1K ohm resistors and prevent triggering of a second SCR. When all lamps are off, and a button is pressed, the corresponding SCR is triggered due __ Designed by Bill Bowden
GameBoy Camera Parallel Port Interface - ok here it is the A/D part of the circuit. If you get anything going please mail me with the results so i can upload them __
GameCube Cop Keeps the Peace - 15-Jun-09 -Design News: Three siblings and one GameCube is a recipe for territorial skirmishes. Many games only support two users. Jeremy Willden bought his three kids a GameCube for Christmas and quickly discovered parental intervention was critical. He initially used a kitchen timer, but soon opted for a more technology __ Gadget Freak-Case #142
Gym Agility: a Simple Circuit Strategy Game using a 4067 multiplexer & 4093 Schmitt NAND gate - This simple circuit is a two-person game of strategy and speedand 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 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 outand vice versa.___ Learning Electronics
Gyrus Arcade Game - Schematic only, no circuit description included. __ Contact: jrokweb @ san.rr.com
Hacking a Gameboy camera - Making a cheap 128x128 B&W digital camera. __ Designed by Rowan from Melbourne, Austrailia
Hangman game - This project covers 7 building blocks and makes a very interesting game for two players. __ Designed by Collin Mitchell
Heads Or Tails Coin Toss - a simple hand held heads or tails decision maker. __ Contact: P. Townshend EduTek Ltd
High Power LED Mood Lamp - In this page we will introduce a great project designed by Toon Beerten. His project named "DIY Led Mood Lamp" can become a very interesting add-on for your room that's absolutely sure it will impress everyone. As you can see on the photos, we talk about a color fading lamp, that looks amazing! __ Designed by Toon Beerten
How to use a SCART TV as a Monitor for MAME arcade game emulator - As the title suggests this is guide to connecting a PC to a TV via it's SCART (aka Peritel or Euroconnector) socket. Specifically, for use with the arcade game emulator AdvanceMame (a port of MAME specially for arcade monitors and TVs) though the info is just as valid for other applications. __ Designed by Tim Worthington
Improve Further On First-Event Detector - 06/27/02 EDN-Design Ideas The circuits in Figure 1have certain advantages over those in a previous Design Ideas(Reference 1]. The first-event detector with autoreset (Figure 1a] consists of N sets of monostable multivibrators, using 4001 logic circuits with L__ Circuit Design by Vasiliy Borodai, Zaporozhje, Ukraine
Improve On First-Event Detection - 08/16/01 EDN-Design Ideas The circuits in Figure 1 and Figure 2 exhibit certain advantages over the circuit shown in the Design Ideasin__ Circuit Design by Lawrence Arendt, Oak Bluff, MN, Canada
Interactive Beer Pong Table - 13-Apr-11 -Design News: Since Cameron Hoerig is an engineering student at the University of Cincinnati, the idea of building a typical beer pong table was out of the question. "I'm an electrical engineering student, so I should have a table that stands out," says Hoerig. He built an interactive table. On either end of the __ Gadget Freak-Case #184
Interactive, Arcade-Style Sandbox - 29-Sep-14 -Design News: Cabe AtwellHuman-Machine Interfaces (HMIs) are a passion of mine. I am forever looking for a better way to use the PC that's faster than the old keyboard and mouse. Capacitive touch screens showed me much is possible. Kinect, Leap Motion, and a few others tried, but failed to replace the standard. Sega has __ Video-Gadget Freak
Interfacing Sony Control stick to Empeg - After discovering that others had interfaced wired remote controls to their Empegs (including Sony control sticks) I decided to try to do it with the fewest components possible. You may find that there are too few, if your power is very noisy (as can happen in a car environment) it may help to place a 0.1uF and/or 10uF capacitor before and/or after the voltage regulator. At the moment I'm not using these but at this point I've only tested it on the bench, not in the car. I'll update this web page after it's all installed. __ Designed by charlie @ armory.com
JAM(Just a Minute) Quiz Game - This jam circuit can be used in quiz contests wherein any par- ticipant who presses his button (switch) before the other contestants, gets the first chance to answer a question. The circuit given here permits up to eight contestants with each one allotted a distinct number (1 to 8). The display will show the number of the contestant pressing his button before the others. Simultaneously, a buzzer will also sound. __
Jeopardy (Fastest Finger First) - This project describes a "Fastest Finger First" system that is cheap to build, has high noise immunity, is reliable and is also extensible. Note that whilst the schematic below may look complicated, its actually a very simple & cheap interlock based round a single 4013 dual d-type flip-flop and an output driver that is replicated for each positionin this example, 8 times. The buzzer is also optional and can be omitted, along with all its associated components. The few extra resistors & capacitors used for improving the noise immunity are very cheap but improve the reliability of the design greatly. i.e. it's a proper design rather than a hack! __ Designed by Nick de Smith
Joystick Interfaces - This is a very simple circuit to interface a current loop sensor to an input which is designed for a voltage, such as that from a standard potentiometer. This page is technical so that interested persons can build the circuit themselves, but 4QD can also supply the interface on a 'postage stamp' sized (22mm x 27mm) board as shown in the first diagram. It is a relatively trivial circuit! __ Designed by Richard Torrens
Joystick Interfaces - This is a page of analogue interfaces for joysticks. Although these interfaces have been developed for use with 4QD's controllers they will have plenty of other uses. Also because of the development history, we have printed circuit boards available (either fully populated and tested) or bare boards) for these interfaces. __ Designed by Richard Torrens
Judge Dredd pinball locking ring Modification - Please read this entire document before installing anything. You can buy this kit for $94 including priority mail shipping from Don Weingarden. Supplies are limited, so email first to confirm availability. The board is available separately for $45 plus $4 shipping. The kit includes a new Dead World ring, matching the original but without the ball release slots __
Junior Pacman Arcade Game - Schematic only, no circuit description included. __ Contact: jrokweb @ san.rr.com
Ladybug Arcade Game - Schematic only, no circuit description included. __ Contact: jrokweb @ san.rr.com
Lazer Tag Equipment Modifications - I added a "fast-fire" circuit to get around the annoying delay that prevents you from firing again immediately. It used the target LED contact on the trigger switch to reset the pulse generator. That way, normally when you fire the sound goes on for its normal duration (we banned any mod that would turn off the sound or always __ Designed by John DuBois
LED Dice - This project has two advantages over previous dice circuits. It produces a realistic readout as well as a 'slow-down' feature. These combine to make it one of our most popular games projects. As can been seen in the photo, the 7 LEDs are positioned on the board in the same positions as the spots on a dice (die). When these are activated, they simulate the rolling of a real dice as it rolls across the table. __ Contact: Collin Mitchell
LED dice based on a 4060 chip - Every self-respecting DIYer makes his own electronic dice with LEDs as spots. Then you don’t have to throw the dice anymore – just push the button. The electronics also ensures that nobody can try to improve his luck by fiddling with the dice. Too bad for sore losers! This circuit proves that an electronic die built using standard components can be made quite compact. The key component of here is a type 4060 digital counter (IC1).___ Learning Electronics
LED dice using PIC16F88 - No circuit description, schematic only___ CdS Electronic
LED dice with fast roll - No circuit description, schematic only___ CdS Electronic
LED Lighting Effects - The original yoyo was equiped with 2 LEDs that lit up whendevice was spinning. I decided to add a micro to give it some extra pazazz. The trick here is to makeunit work without a power switch. The mercury switch is positioned so that it supplies power whenunit is spinning. After about 20 seconds, PIC shuts down in sleep modes, __ Designed by Luhan Monat-Mesa Arizona
LED Zeppelin - The name of our game, LED Zeppelin, is a play on words. It comes not from the pop group of the same name but from Graf Von Zeppelin, a German who invented the first rigid air ship in 1900. The association fits perfectly. The game consists of six LEDs and an indicator LED that flashes at a rate of about 2 cycles per second. A push button is the "Operations Control" and by carefully pushing the button in synchronisation with the flashing LED, the row of LEDs will gradually light up __ Contact: Collin Mitchell
LEDs or Lamps Sequencer - Very simple, versatile modular design No limits to the number of modules used in the ring __ Contact: Flavio Dellepiane, fladello @ tin.it
Lego Mindstoms IR Link PIC transceiver - I just finished a half duplex serial asynchronous link from a simple PIC circuit to the RCX. It is able to receive codes from the RCX (or Lego RCX remote control) store them in RAM & EEPROM and transmit any IR op-code to the RCX in turn. Included in the firmware is a routine that takes any opcode(s) and expand it to the proper IR packet for transmission to the RCX. I've used the UIRT circuit with a few modifications for the hardware. The UIRT includes a serial port programmer for the PIC16F84A so you won't need a separate programmer. Here's the website where you can find the programmer. Here are the modifications to get the UIRT to work with the RCX. __ Designed by Lloyd Gordon
Lego Mindstorms Double Rotation Sensor - I usually use one motor for the left wheel and one for the right wheel. The problem is that the motors are never perfectly matched and my RCX ends up going in circles. I thought of buying two rotation sensors to keep track of the rotation of both wheel axles. However this would use up two sensor ports, leaving only one for my other sensors __ Designed by Lloyd Gordon
Lego Mindstorms Double Rotation Sensor - I usually use one motor for the left wheel and one for the right wheel. The problem is that the motors are never perfectly matched and my RCX ends up going in circles. I thought of buying two rotation sensors to keep track of the rotation of both wheel axles. However this would use up two sensor ports, leaving only one for my other sensors __ Designed by Lloyd Gordon
Let's Get Quizzical: a Quiz Game with a Difference - No more boring old buzzers for us...___ SiliconChip
Lottery Number Generator - good for generating those lottery numbers! __ Contact: P. Townshend EduTek Ltd
Lotto Selector - Helps you win a fortune. __ Contact: Collin Mitchell
Low-Cost Electronic Quiz Table - Here is a simple, low-cost quiz table for four game participants. It determines the contestant who first presses the switch (S1 through S4) to answer a question and locks out the...___ Electronics Projects for You
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