Rongge

FM tracer was prepared using the LM3909 IC and some supporting components. 1.5V FM trackers This will provide an indicator of revenue sources by providing a signal emitted by the LED . FM tracking uses a source voltage of the battery cell and fruit consumption current is 3.7 mA. After completion of assembling Tracker FM 1.5V , then the next step is setting the operating frequency of the FM tracker is, for convenience we can use the FM receiver and adjust the working frequency FM 1.5V Tracking (tracking transmitter) by regulating C3. Have been obtained if the working frequency  Tracking FM 1.5V  ( tracking transmitter ) then the corresponding LED will light emitted by the transmitter information such as sound through an FM receiver is terdengan. 1.5V FM tracker (tracking transmitter) can use a regular 12-inch antenna. Playing and learning electronics that will be happy, 1.5 Volt Tracking FM circuit ( Tracking Transmitter ) Circuit   Description 1.5 Volt Tracking...

This simple water level sensor circuit monitors the presence of water in a certain location or container. The circuit sends an acoustic alarm when it senses a drop of water leak. It is very simple to build and it is made of a single IC and some passive components. Check out the water level indicator circuit too! The IC LM1801 is a low power comparator that can deliver high output current if needed. When water hits the sensor, the reference voltage is overshot and the IC drives the ceramic transducer to beep. It is also possible to connect several sensors to the water level monitor circuit. The sensor can be easibly made out of a small piece of PCB that is etched with the proper pattern. The decoupling capacitor C3 is a 100uF/16V electrolytic capacitor.  source [link]