2n3904 download12/19/2023 ![]() ![]() It is a steady, and harmonic-free FM transmitter so it is used in a place where we need stable FM broadcast.Keep all the parts as close as could reasonably be expected and utilize a 12-inch wire for the antenna or utilize a 30-inch wire antenna for a more prominent range. The input voltage can be 9- or 12-volts DC. The loop L is equivalent to 8 to 10 turns of #22 enameled wire twisted on 6.30 millimeters breadth structure. The circuit is just utilizing a couple of parts however gives a decent range. The rf circuit that appeared beneath is a smaller than usual stable FM transmitter that is utilizing a Zener diode to give precise voltage to the oscillator while the battery drains, because of which it won’t float its frequency. ![]() ![]() There are numerous procedures to produce an FM transmitter stable so it won’t change its frequency as the battery drains. Figure 1: An illustration of the pin out of a standard TO-92 package for Digi-Key part number 2N3904FS-ND: E Emitter, B Base, C. In this part, we are discussing the operation of the “FM transmitter circuit” which is stable and harmonic-free. The 2N3904 is an extremely popular NPN transistor that is used as a simple electronic switch or amplifier that can handle 200 mA (absolute maximum) and frequencies as high as 100 MHz when used as an amplifier. ![]()
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