|
|
CarButtons - Interfaces car's "media control buttons" (usually on
steering wheel) to PC using USB. It is also compatible with many other resistive
input devices, even home-made buttons. (project added 08/08/08) |
|
Casio QV-200 Digital Camera Cable. - Lose your cable? Build it yourself and
save $29. Fits many QV models. (electronic project added 2/06) |
|
Color Sensor for Robot - I'm developing a simple, active, color, object
sensor for my robots based on three ultra-bright LEDs. An old-fashioned
cadmium-sulfide sensor detects the brightness of the reflected red, green, and
blue as each is turned on individually. (project added 10/06) |
|
Combination Lock (nutchip) - Combination lock are nice to enable alarms, but
are useful for controlling a wide range of electric devices. These software keys
can open gates, garages, TV sets, telephones, VCRs, well pumps... In practice
this circuit is capable to lock or time all the devices that can be connected to
relays. (electronic design added 6/07) |
|
|
Combination Tachometer, Thermometer, & Counter - Inspired by the need to measure
dc motor speed and detect overheating, this 68HC908KX8 microcontroller-based circuit
displays various statistics on six-digit, eight-segment, numeric LEDs. See movies of a
thermistor in action as well as a reflective or interrupt-based photosensor counting.
(project added 10/06) |
|
Computerize Your Room/Home (Aaron Cake) - (circuit / schematic design added 7/02) |
|
Constant Current Power Load - Suitable for testing power supplies to 100 watts.
(electronic Construction Project added 09/06) |
|
|
[_OLD-ads-dont_upload/OLD I-ADS from web/ad-djandassoc.htm] |
|
|
Decimal to BCD Decoder - This circuit will take the input from a keypad with up to
16 buttons, and convert it into a ''latched'' BCD output. (circuit design added
6/07) |
|
Decoding 4 buttons with 2 I/O pins Controllers with tristate I/O Ports
- Just the solution for AVR applications in which I/O is tight, such as the ATtiny12.
This should work well on other kids of controllers that have independently controlled
I/O direction registers, such as PIC and 6805 controllers...(schematic / circuit added
6/07) |
|
Delayed Start for Appliances - your washing machine lacks this useful feature?
This special timer will power it only when you want to. Say goodbay to creasy clothes
because of the time spent waiting in the machine. And if your problem is limited
overall electric power, you can set up the washing machine and the dishwater at the
same time, having them working at different hours (electronic design added 6/07) |
|
Design & Construction of
Radio Frequency (RF) Oscillators - (electronic schematic / circuit added 2/05) |
|
Desktop Power Supply from a PC - This ATX PS board has leads for +5 (RED), -5
(WHITE), +12 (YELLOW), -12 (BLUE) volts, Ground (BLACK) and switch (GREEN). Dell power
supplies manufactured between 1996 and 2000 do not follow the industry standard pinout
and color codes. The fan has also been unplugged for better viewing. Since this PS was
converted for use in the logic and robotics labs, t... (electronic project added 2/06) |
|
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) |
|
Digital Lock-in Milliohmmeter - (circuit added 6/07) |
|
Digital RF Field Strength Indicator - (circuit added 6/07) |
|
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 ...(added
6/07) |
|
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) |
|
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....(added 6/07) |
|
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) |
|
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) |
|
DS: 3 channel 8 bit EEPROM DAC with DS interface - (circuit added 6/07) |
|
DS: Clock/Calendar/Alarm with EEPROM-based interpreter & DS Interface - (schematic
/ circuit added 6/07) |
|
DS: Firmware based protocol for low priority data transfer - (circuit added 6/07) |
|
DS: Test & development tool for DS interface - (circuit added 6/07) |
|
DTMF Tone Decoder - hears touchtones and displays them as telephone numbers.
(electronic project added 2/06) |
|
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) |
|
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...(added 6/07) |
| |
