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Rain Sound Effect Generator - Agreeable, relaxing effect, helping to fall asleep
Small portable unit, 3V battery powered (added 3/05) |
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Refrigerator Pig Schematic - Upon opening your fridge door the photocell is
exposed to light and the piggy oinks. (added 2/05) |
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Salt-Taster - Detects the amount of salt contained in liquid foods (added 3/05) |
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Simple Lie Detector (Aaron Cake) - Here's a simple lie detector that can be built
in a few minutes, but can be incredibly useful when you want to know if someone is
really telling you the truth. It is not as sophisticated as the ones the professionals
use, but it works. It works by measuring skin resistance, which goes down when you
lie. (electronic schematic design added 03/04/05) |
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Sleeping-Aid - Based on electromagnetic-field radiation. Place it under the
pillow - Built-in timer. (electronic circuit added 06/07/08) |
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Snore Alarm - The idea behind this snore alarm, is just to rouse the snorer, not
the entire household. To wake the sleeper, vibration is used, not an audible alert.
The vibration is provided by a small motor housed in a small 35mm film case, which can
be placed under the sleepers mattress or pillow. This circuit has a level control and
peak display indicator, a variable trigger threshold and....(added 10/05) |
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Snore Alarm Electronic Device - (electronic circuit added 7/03) |
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Sobriety Tester - With all the holidays upon us, understandably some of us will
be drinking alcoholic beverages. This circuit can be used as a guideline how much you
have had to drink and how good your reaction time is. This circuit does not tell you
whether you are over the legal limit of alcohol in in your blood....(added 05/08) |
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Step-Km Counter - Pedometer has a range of 9.950 meters with2-digits. Slip it in
pants pocket for walking and jogging (added 02/05) |
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Stress Meter - This project comes with all parts, PC board and a pre-programmed
chip for STRESS METER. But you are encouraged to add more sub-routines to the program
and learn to program the chip yourself. You will need the "Chip Programmer Model F"
and the software provided below....(circuit design added 05/07) |
|
Sudden Ionospheric Disturbance SID Receiver - My Sudden Ionospheric Disturbance
(SID) receiver is a modified Stokes' Gyrator tuned VLF receiver based on the circuit
board available from FAR circuits (see Communications Quarterly Spring 1994
pp.24-26).... (electronic design added 11/06) |
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Sun tanning timer - (electronic circuit added 4/05) |
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Tan Timer - Six timing positions suited to different skin types. Timing affected
by sunlight intensity. (electronic circuit added 06/07/08) |
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The ESP SIM Sound Impairment Monitor - (electronic circuit added 4/05) |
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Thermometer - (application / block diagram added 6/07) |
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Ultrasound Imaging - (application / block diagram added 6/07) |
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Vital Signs Monitor Consumes Less than 50 µA - 02/02/02/98 EDN-Design Ideas /
(added 3/03) |
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Wart Zapper - ….(electronic schematic added 03/08) |
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Wireless Electrocardiogram Monitor - (diagram added 05/07) |
