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Dice (nutchip) - A LED dice, bright, unbiased, and spectacular.
The display uses 7 LEDs to simulate the faces of a real dice…. (electronic
design added 6/07) |
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Digital Lock-in Milliohmmeter - (circuit added 6/07) |
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Digital RF Field Strength Indicator - (circuit added 6/07)
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Digital wireless for the bench top ATtiny12 - This section
describes an experimental low power, low bandwidth data signaling system
that was initially made to operate at 55 MHz (television channel 2 in the
U.S.). Before operating a radio transmitter, find out what kind of
transmitter operation, if any, is permitted in your locality. Radio
transmitter operation is a serious legal matter. This design....
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Display-Counter - Using a 4511, a specialized decoder IC, learn
how to drive a 7-segment display. The article explains the technique for
counting from zero to nine. this technique is the base for more complex
applications, like a countdown timer or a gear display for a motorcycle.
(electronic design added 6/07) |
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DIY Electrostatic Headphones - Electrostatic headphone built in
the enclosure of an old pair of dynamic headphones. The author gives
detailed instructions for constructing the electrostatic transducers and a
high voltage amplifier from PA transformers. Designed by Andrew
Radford (Circuit design added 04/05/06) |
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DIY Electrostatic Loudspeaker Part 1 - An ESL using ready made panels
available exclusively from ESP. Part 1 .... |
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DIY Electrostatic Loudspeaker Part 2 - ESL cabinet details. Part 2
.... |
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DIY Electrostatic Loudspeaker Part 3 - ESL Transformers and Power Amplifier
Details. Part 3 .... |
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DIY Front Panels - ….must register on this site.... [Published in Elecktor
July/August 2010] |
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DIY Hard Drive Clock - The hard drive clock is quite possibly the best diy
electronics paperweight I have come across. Even though it has no particular use, it
is uber cool. The clock requires a PIC 16f628 microcontroller, and old hard disk, and
some miscellaneous components.... |
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DIY Headphone Amplifier With Natural Crossfeed - Some crossfeed acoustic
simulators suffer from frequency-response anomalies (called Comb-filter effects)
because they use a fixed, frequency-independent delay in the crossfeed signal. The
author has developed a crossfeed filter/headphone amplifier with frequency-dependent
delay that eliminates the Comb-filter effect. It is constructed....Designed by Jan
Meier (Circuit design added 04/05/06) |
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DIY Lie detectors - Makezine recently posted a diy lie detector kit that
uses your skin resistance (aka sweat) to detect a lie. The kit is well explained and
consists of two probes you place on your palm with a red/green led readout….(project
added 6/07) |
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DIY remote control based on PIC - Control up to 8 devices by this easy
constructable remote control. It can work as a radio or infrared remote control,
depending on the components. Each device output can be configured to be momentary
(turned on while you press the button) or latched. Latched outputs can be toggled
on/off by one button per channel, or turned on and off by two buttons per channel….
[Peter Jakab, Electrical Engineer, Engineer of Informatics] |
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DIY Serial MIDI Interface 80C51/80C31 Version - (diagram added 2/07)
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DIY SMD Adapter - ….must register on this site.... [Published in Elecktor
July/August 2010] |
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Door chime Privacy Sentry ATtiny12 - An ATtiny12 controller as a timer and
some switching circuitry turns the doorbell off for 10 hours at the same time each
day….(schematic / circuit added 6/07) |
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DS: 3 channel 8 bit EEPROM DAC with DS interface - (circuit added 6/07)
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DS: Clock/Calendar/Alarm with EEPROM-based interpreter & DS Interface -
(schematic / circuit added 6/07) |
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DS: Firmware based protocol for low priority data transfer - (circuit added
6/07) |
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DS: Test & development tool for DS interface - (circuit added 6/07)
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DTMF Tone Decoder - hears touchtones and displays them as telephone numbers.
(electronic project added 2/06) |
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Dual Fan Controller (David Cook) - A birthday present gone too far. An
overengineered temperature-based automatic twin fan controller with brass face to keep
a kitchen PC cool. (project added 10/06) |
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Dual Mode Superhet/Direct Conversion AM receiver for 181.818 kHz Lowfer ATtiny2313,
AT90S2313 - This is a description of an experimental AM receiver for VLF. It
is crystal controlled to receive 181.818 kHz (more or less) and operates as either a
single conversion superhetrodyne or a direct conversion receiver. The bandwidths are
expected to be 15 Hz to 3.5 kHz in superhet mode and 15 Hz to 10 kHz in the direct
conversion mode. Operation is from a singler.... |
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