Stereo FM Transmitter with BA1404


Stereo FM Transmitter with BA1404


With this Stereo FM Transmitter with BA1404 you will be able to create a mini stereo FM station and broadcast to your entire home, a simple way to have an audio link wireless with ease. With the FM transmitter BA1404 Hifi Stereo you can stream your music from your iPod MP3, satellite receiver, computer, DVD player, Mobile Phone, MP4 player and MP3 and other audio source directly to an FM receiver with crystal clear sound.

Stereo FM Transmitter with BA1404

This is the diagram of the transmitter, the connectors CN1 and CN2 are stereo audio inputs of the trimpot (pots can be added) are for the volume adjustment capacitor + resistor (R1 / C4 and C11 / R2) form the pre-emphasis filter in the case of Brazil is 75μS.

The crystal ensures 38KHz stereo broadcast, in case you do not find this component to the assembly of your circuit, you will have a mono high-quality transmission, the MPX signal (with 2 audio channels multiplexed), leave the pin 14 and join with the 19kHz pilot signal (pin 13) and return to ci on pin 12 and will take the stage high-frequency oscillator formed on pins 9 and 10, the coil of 3.5 turns of the type found in FM radios in parallel with the 10pF capacitor C13 will be responsible for the fluctuation in the FM band.

The following high-frequency signal of the transistor T1 pin 7 to ensure a greater distance n transmission, the antenna coupling capacitor C9 which may be a telescopic or a piece of stiff wire.

The power supply should be a battery 9Volts preferably rechargeable 9-volt feed to the power transistor, as BA for the integrated circuit 1404 is required only 3 volts or it can burn. then 3 1N4148 diodes are used as a reference voltage of 2.1 volts in this source.

When assembling this circuit, make sure all components are positioned in the correct place and then connect the battery, then connect an audio source such as an MP4 and a nearby FM receiver, adjust the coil, using a “little key “plastic or wood, until you hear the signal on the radio. If you can not try to set other values ​​for C13, and without then redo the settings.

Parts for Stereo FM Transmitter with BA1404
Resistors 1/8 Watt 5%
R1, R2 47K – Yellow, Violet, Orange, Gold
R3, R7 270 – Red, Violet, Brown, Gold
R4 10K – Brown, Black, Orange, Gold
R5 4.7K – Yellow, Violet, Red, Gold
R6 150K – Brown, Green, Yellow, Gold
R8, R9 22K – Red, Red, Orange, Gold
R10 470 – Yellow, Violet, Brown, Gold
C1, C5, C10, C12 10µF/16V – Polarized Electrolytic Capacitor
C2,C4, C7, C9, C11, C15, C17 1nF – 25V Ceramic Capacitor
C3, C6, C8, C13, C14 10pF – 25V Ceramic Capacitor
C16 470µF/16V – Polarized Electrolytic Capacitor
IC1 BA1404 – FM stereo transmitter chip
T1 2SC2458 – RF Transistor
D1, D2, D3 1N4148 – Diode
L1 3.5 turns coil with adjustable core
P1, P2 1k – Trimpot – Volume Adjustment
ANT Connect telescopic antenna or piece of stiff wire
B1 9V battery
CN1 Left audio connector
CN2 Right audio connector
X1 38KHz quartz crystal
Solder, wire, printed circuit board, box, connectors, etc..

Stereo FM Transmitter with BA1404
BA1404 HI-FI Stereo FM Transmitter Kit

Accurate LC Meter Capacitance Inductance Meter with 16F628 and LCD
Volt Ampere Meter with 16F876 Microcontroller and LCD display
Accurate LC Meter

Build your own Accurate LC Meter (Capacitance Inductance 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 and inductors. 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 as well as reset switch and produces very accurate and stable readings.
PIC Volt Ampere Meter

Volt Ampere Meter measures voltage of 0-70V or 0-500V with 100mV resolution and current consumption 0-10A or more with 10mA resolution. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored. The meter uses PIC16F876A microcontroller with 16x2 backlighted LCD.

50MHz 60MHz Frequency Meter / Counter with 16F628 & LCD
1Hz - 2MHz XR2206 Function Generator
60MHz Frequency Meter / Counter

Frequency Meter / Counter measures frequency from 10Hz to 60MHz with 10Hz resolution. It is a very useful bench test equipment for testing and finding out the frequency of various devices with unknown frequency such as oscillators, radio receivers, transmitters, function generators, crystals, etc.
1Hz - 2MHz XR2206 Function Generator

1Hz - 2MHz XR2206 Function Generator produces high quality sine, square and triangle waveforms of high-stability and accuracy. The output waveforms can be both amplitude and frequency modulated. Output of 1Hz - 2MHz XR2206 Function Generator can be connected directly to 60MHz Counter for setting precise frequency output.

BA1404 HI-FI Stereo FM Transmitter
USB IO Board PIC18F2455 / PIC18F2550
BA1404 HI-FI Stereo FM Transmitter

Be "On Air" with your own radio station! BA1404 HI-FI Stereo FM Transmitter broadcasts high quality stereo signal in 88MHz - 108MHz FM band. It can be connected to any type of stereo audio source such as iPod, Computer, Laptop, CD Player, Walkman, Television, Satellite Receiver, Tape Deck or other stereo system to transmit stereo sound with excellent clarity throughout your home, office, yard or camp ground.
USB IO Board

USB IO Board is a tiny spectacular little development board / parallel port replacement featuring PIC18F2455/PIC18F2550 microcontroller. USB IO Board is compatible with Windows / Mac OSX / Linux computers. When attached to Windows IO board will show up as RS232 COM port. You can control 16 individual microcontroller I/O pins by sending simple serial commands. USB IO Board is self-powered by USB port and can provide up to 500mA for electronic projects. USB IO Board is breadboard compatible.

ESR Meter / Transistor Tester Kit
Audiophile Headphone Amplifier Kit
ESR Meter / Capacitance / Inductance / Transistor Tester Kit

ESR Meter kit is an amazing multimeter that measures ESR values, capacitance (100pF - 20,000uF), inductance, resistance (0.1 Ohm - 20 MOhm), tests many different types of transistors such as NPN, PNP, FETs, MOSFETs, Thyristors, SCRs, Triacs and many types of diodes. It also analyzes transistor's characteristics such as voltage and gain. It is an irreplaceable tool for troubleshooting and repairing electronic equipment by determining performance and health of electrolytic capacitors. Unlike other ESR Meters that only measure ESR value this one measures capacitor's ESR value as well as its capacitance all at the same time.
Audiophile Headphone Amplifier Kit

Audiophile headphone amplifier kit includes high quality audio grade components such as Burr Brown OPA2134 opamp, ALPS volume control potentiometer, Ti TLE2426 rail splitter, Ultra-Low ESR 220uF/25V Panasonic FM filtering capacitors, High quality WIMA input and decoupling capacitors and Vishay Dale resistors. 8-DIP machined IC socket allows to swap OPA2134 with many other dual opamp chips such as OPA2132, OPA2227, OPA2228, dual OPA132, OPA627, etc. Headphone amplifier is small enough to fit in Altoids tin box, and thanks to low power consumption may be supplied from a single 9V battery.

Arduino Prototype Kit
RF Remote Control 433MHz Four Channel
Arduino Prototype Kit

Arduino Prototype is a spectacular development board fully compatible with Arduino Pro. It's breadboard compatible so it can be plugged into a breadboard for quick prototyping, and it has VCC & GND power pins available on both sides of PCB. It's small, power efficient, yet customizable through onboard 2 x 7 perfboard that can be used for connecting various sensors and connectors. Arduino Prototype uses all standard through-hole components for easy construction, two of which are hidden underneath IC socket. Board features 28-PIN DIP IC socket, user replaceable ATmega328 microcontroller flashed with Arduino bootloader, 16MHz crystal resonator and a reset switch. It has 14 digital input/output pins (0-13) of which 6 can be used as PWM outputs and 6 analog inputs (A0-A5). Arduino sketches are uploaded through any USB-Serial adapter connected to 6-PIN ICSP female header. Board is supplied by 2-5V voltage and may be powered by a battery such as Lithium Ion cell, two AA cells, external power supply or USB power adapter.
200m 4-Channel 433MHz Wireless RF Remote Control

Having the ability to control various appliances inside or outside of your house wirelessly is a huge convenience, and can make your life much easier and fun. RF remote control provides long range of up to 200m / 650ft and can find many uses for controlling different devices, and it works even through the walls. You can control lights, fans, AC system, computer, printer, amplifier, robots, garage door, security systems, motor-driven curtains, motorized window blinds, door locks, sprinklers, motorized projection screens and anything else you can think of.

Electronics-DIY.com © 2002-2023. All Rights Reserved.