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automatic curtain closer
AUTOMATIC CURTAIN CLOSER
This circuit uses a mixture of transistors, an IC and a relay and is used to automatically open and close a pair of curtains. Using switch S3 also allows manual con ... readmorefSWQgCWk~$%28KGrHqEOKjcEweumJlfOBMNq3jeYTQ%7E%7E_35.JPG)
555 Two-Tone AlarmElectronic Project
555 Two-Tone Alarm
This project is designed to support the Hila demonstration speaker project.
Follow this link for information about getting started in electronics.
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TRAFFIC LIGHTSTRAFFIC LIGHTS
Here's a clever circuit using two 555's to produce a set of traffic lights for a model layout.
The animation shows the lighting sequence and this follows the Australia ... readmore
music box This circuit produces 10 different tones MUSIC BOX
This circuit produces 10 different tones and by selecting suitable values to change the voltage on pin 5, the result can be quite pleasing. Note: the two unused outputs of ... readmore
missing audio detector
MISSING AUDIO DETECTOR
This circuit detects when audio is not received for about 4 seconds and turns on an alarm.
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