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#Guessing Game - This number guessing game is quite simple. In
this game the player thinks of any number between 1 and 99. Then he scans
the eight groups of numbers given in the eight boxes in the table. Each
group corresponds to a specific switch (indicated on the top of each
group) on an 8-way DIP switch..... [Author is PRIYANK MUDGAL] |
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6V Ultra-Bright LED Chaser - This is a spectacular but
completely useless project. It lights Ultra-Bright LEDs in a sequence and
each LED flashes brightly very briefly. The LEDs light-up going around and
around since they are mounted in a circle (on a CD), then they
pause.....(electronic design added 6/07) |
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Another Game Show Timer - Scroll down to find this circuit.
Here is a somewhat more complex version that uses easily found bipolar
transistors. Note that it requires only two wires between stations and
base and those wires can be connected anywhere on the "buss". ….....
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Archery Timer - (circuit / schematic added 6/05) |
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Bingo! (on your TV) - This design is based on the video DVM and cronograph
design. It supports color, so numbers not yet drawn (all but 1 and 87 in the picture
on the left) are displayed in green and the others in white. White lines are
intentional, according to the Italian rules the drawer itself takes place in game
choosing one of the six regions.....(DDED 05/06) |
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Birthday Heart - This circuit was made for my wife's birthday. It is capable
of flashing five strings of LED's with different frequencies. It also has a connector
for an 8 Ohm loudspeaker and two connectors for the small PCB's that are contained in
musical greeting cards. In this way the circuit will play alternatingly two room
filling tunes at regular time intervals. After a w..... |
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Burger Time Arcade Game - ..... |
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Cat Toy - The PIC12F675 is small in size and low in power. It lends itself
to some really off-beat uses..... [Luhan Monat - Mesa Arizona] |
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Christmas Star - This circuit can be used to construct an attractive
Christmas Star. When we switch on this circuit, the brightness of lamp L1 gradually
increases. When it reaches the maximum brightness level, the brightness starts
decreasing gradually. And when it reaches the minimum brightness level, it again
increases automatically. This cycle repeats. The increase and decrease of
brightness of bulb L1 depends on the charging and discharging of capacitor C3. When
the output of IC1 is high, capacitor C3 starts discharging and consequently the
brightness of lamp L1 decreases. IC2 ….(Circuit design added 03/08) |
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Circuit improves further on first-event detector - 27-Jun-02 Issue of EDN
The circuits in Figure 1have certain advantages over those in a previous Design Idea
(Reference 1]. The first-event detector with autoreset (Figure 1a] consists of N sets
of monostable multivibrators, using 4001 logic circuits with LEDs attached. After any
player (1 through N] presses a pushbutton, the corresponding monostable multivibrator
switches on, and its associated LED lights..... [Design Idea by Vasiliy Borodai,
Zaporozhje, Ukraine] |
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Circuit improves on first-event detection - 16-Aug-01 Issue of EDN The
circuits in Figure 1 and Figure 2 exhibit certain advantages over the circuit shown in
the Design Idea in EDN, "Circuit detects first event," May 3, 2001, pg 89. The
n-player first-event-detection circuit offers several improvements It has fewer
passive components. It needs only n diodes instead of (n2+n]/2 for three orplayers.....
[Design Idea by Lawrence Arendt, Oak Bluff, MN, Canada] |
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Coin Tosser - The UJT transistor Q1 can be replaced with a NTE6409 or
ECG6409. At the press of S1 the oscillator starts and runs the clock on pin 14
of the CD4017 decade counter at a time determined by R1 and C1. During that time
both LED's will flash back and forth until the oscillator stops and either the red or
green led will be lit. The values shown are for working with 9 volts and none of
the parts are critical…. [Tony van Roon's circuit] |
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Combinational Conjuring Trick - The simple circuit of Fig.1 emulates a
similar conjuring trick which sells for hundreds of Pounds. The trick seems to do the
almost-impossible from an electronic point of view, let alone from the point of view
of common sense. It consists of a bank of three on-off switches (S19-S21), which
have three switch covers, each of a different colour. These switch a bank of three
lightbulbs(schematic / Circuit design added 9/02) |
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Conjuring Trick - Two soft start power supplies. The output voltage slowly
increases to the desired output [Circuit : Miroslav Adzic] |
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Connecting Sega 3d Glasses to a PC Serial Port - (electronic schematic added
703) |
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Convert Atari-style Joystick to PC Joystick Port - Some games are easier to
play with digital joystick instead of analogue type. Unfortunately PC has only
analogue joystick connector, which makes it impossible to connect normal digital
joystick to it. But with a little adapter circuit, it is possible to use Atari style
digital joystick with IBM PC joystick interface. The circuit adapts the joystick
connectors and converts digital joystick movement signals to analogue signals…(added
05/05/05) |
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Co-Ordinator - A games of skill & patience. This project combines some of
the components and building blocks we have covered in the courses in this e-magazine.
It's a game of skill that tests your reaction-time and patience. Patience,
because a certain condition appears on the indicator LEDs, only every few seconds and
it corresponds to them both being OFF. (electronic circuit added 04/09) |
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Courtesy Light - 15 seconds delayed switch-off for220-Volt AC lamp, a good
idea for bedroom lamps (added 11/06) |
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Cuckoo sound Generator - This circuit generates a two-tone effect very much
alike the cuckoo sound. It can be used for door-bells or other purposes thanks to a
built-in audio amplifier and loudspeaker. Used as a sound effect generator it
can be connected to external amplifiers, tape recorders etc. In this case, the
built-in audio amplifier and loudspeaker may be omitted and the output taken from C8
and ground.…. |
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