FM transmitter

House fm transmitter 88-108MHz at 4 Watt

This is Fm transmitter circuit for house. It is modulation type Mono FM and Frequency range 88-108 MHz. By it have Working voltage range 12-18 VDC and use current max at 450mA only. This circuit convenient for , because , have good small-sized. It is the ideal project for the beginner who wishes to get started in the fascinating world of FM broadcasting and wants a good basic circuit. This circuit use the transistor the important , be the number is 2N3553.

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Be the first to comment - What do you think? Posted by admin - April 19, 2009 at 8:26 am

Categories: FM transmitter, RF-Radio Frequency Tags: audio fm transmitter, house fm transmitter

Low Pass Filter For FM 88-108 MHz

Filter used for eliminate unwanted harmonic frequency at second and third. Notch filter, Band Pass Filter (BPF), and High Pass Filter (HPF) sometime combined in constructing LPF design. Schematic below for FM Broadcast Lowpass Filter 88-108 MHz. It has been tested with a good result. Note : Make the coils at 74 nH and trim them to adjust exact value.
Source: http://www.electronics-diy.com/electronic_schematic.php?id=803

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Be the first to comment - What do you think? Posted by admin - April 17, 2009 at 8:23 am

Categories: FM transmitter, RF-Radio Frequency Tags: FM broadcast, Low Pass Filter, low pass filter calculator

FM surveillance BuG Transmitter using 2N2222

The Circuit shown can transmit voice to exceptionally good range. Tune trimmer to hear the signal to your near radio. Frequency range is 88-108 MHz. Max current consumption is 30mA. You can power the bug with a 9Volt Battery, or you can plug a power supply to feed in 9-12 Volts. That bug will pick even a low whisper or even the sound of a breath well far from the microphone. Great spy equipment.