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Sound Operated Switch
Posted on Tuesday, October 19, 2010   •   Category: Miscellaneous

Sound Operated Switch

This sensitive sound operated switch can be used with a dynamic microphone insert as above, or be used with an electric (ECM) microphone.

     3D Sound Audio Delay
     GPS Disciplined Frequency Standard
     Using an Optocoupler
     Driving N-Channel MOSFETs with a Microcontroller
     Simple MOSFET Switch
     Table Lamp Circuit with LM555
     Using HSR312 / HSR412 Solid State Relays
     Solid State Relays
     Anti Theft Car Wireless Alarm
     Digital ON-OFF Tactile Button Relay Switch
Sound Operated Switch

 

Build Accurate LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and reset function to make sure the readings are as accurate as possible ... [more]



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