Skip to main content

AM transmitter using Integrated Circuit


Many beginners give up playing with RF due to the difficulty of building coils and problems with self oscillations that are common in many electronic circuits of RF. I always point out to beginning the construction of a small FM transmitter, myself have made available a simple circuit and an explanatory tutorial in Article Micro FM Transmitter and Micro Spy FM Transmitter Spy Bug in SMD.

The RF is really a very critical area, but on the other hand, it is the most rewarding, especially when we see one of our creations give the air of grace and drop its waves through the air. I always say that we learn more from mistakes and making mistakes is part of the electronics, I even today burst capacitors and transistors see loose tufts of smoke, the difference is that today I have fun with these errors.

Here I will publish a simple electronic circuit RF, so simple that does not use a single coil. This is a small tone transmitter modulated (AM) for the band of medium waves (AM) using an integrated inverter hex 4049 and a crystal circuit. The circuit is very simple, but effective, as can transmit smoothly.


AM transmitter using Integrated Circuit


Many beginners give up playing with RF due to the difficulty of building coils and problems with self oscillations that are common in many electronic circuits of RF. I always point out to beginning the construction of a small FM transmitter, myself have made available a simple circuit and an explanatory tutorial in Article Micro FM Transmitter and Micro Spy FM Transmitter Spy Bug in SMD. The RF is really a very critical area, but on the other hand, it is the most rewarding, especially when we see one of our creations give the air of grace and drop its waves through the air. I always say that we learn more from mistakes and making mistakes is part of the electronics, I even today burst capacitors and transistors see loose tufts of smoke, the difference is that today I have fun with these errors. Here I will publish a simple electronic circuit RF, so simple that does not use a single coil. This is a small tone transmitter modulated (AM) for the band of medium waves (AM) using an integrated inverter hex 4049 and a crystal circuit. The circuit is very simple, but effective, as can transmit smoothly. AM transmitter using Integrated Circuit The operation of this AM transmitter is simple, the RF oscillator in the transmitter circuit uses an inverter (7-6), whose frequency is determined by the 1 MHz crystal, as we see in the scheme. Two more drives (9-10 / 11-12) amplify the 1MHz oscillator signal. Have the two inverters (3-2 / 5-4) produce an audio tone, which is modulated with the RF signal by the last inverter (14-15). You can use a piece of wire as an antenna, the signal, a buzz, should be easily capitate until a few meters from the transmitter at 1000 kHz in any AM radio. With this circuit it is possible to work with the fundamental frequency and its harmonics at all integer multiples of a 1 MHz (or 2 MHz, 3 MHz, ... 10 MHz). This circuit can also be used as a frequency standard to verify the calibration of the display of a short wave radio.


The operation of this AM transmitter is simple, the RF oscillator in the transmitter circuit uses an inverter (7-6), whose frequency is determined by the 1 MHz crystal, as we see in the scheme. Two more drives (9-10 / 11-12) amplify the 1MHz oscillator signal.

Have the two inverters (3-2 / 5-4) produce an audio tone, which is modulated with the RF signal by the last inverter (14-15). You can use a piece of wire as an antenna, the signal, a buzz, should be easily capitate until a few meters from the transmitter at 1000 kHz in any AM radio.

With this circuit it is possible to work with the fundamental frequency and its harmonics at all integer multiples of a 1 MHz (or 2 MHz, 3 MHz, ... 10 MHz). This circuit can also be used as a frequency standard to verify the calibration of the display of a short wave radio.

Comments

Popular posts from this blog

Transceiver Homebrew QRP SSB 80M Band

Radio communication transceiver is a radio transmitter at the same time the plane doubles as a radio receiver used for communication purposes. It consists of the transmitter and the receiver are assembled in an integrated way. In mulamula generation, the transmitter or receiver or transmitter and receiver sections are assembled separately and is part of a stand sendirisendiri and can work well sendirisendiri Currently employed both parts are integrated in turn. Aircraft simple transmitter consists of an oscillator generating radio vibration and this vibration after vibration boarded with our voice, in a technique called dimodulir radio, then by the antenna is converted into radio waves and transmitted. As we know that the sound waves we can not reach long distances, although its power is quite large, while the radio waves with a relatively small force can reach a distance of thousands of kilometers. In order for our voice can reach a far distance, then our voice superimposed on radio w...

NE566 Function Generator Circuit Diagram

The NE566 Function Generator is a Voltage-Controlled Oscillator of exceptional linearity with buf fered square wave and triangle wave outputs. The frequency of oscillation is determined by an external resistor and capacitor and the voltage applied to the control terminal. The Oscillator CAN be programmed over a ten-to-one frequency range by proper selection of an external resistance and modulated over a ten-to-one range by the control voltage, with exceptional linearity.  FMAX = 1 MHz     WIDE 1000:1 Continuous Sweep Possible  NE566 Function Generator Circuit Diagram Pdf Datasheet  Sourced by : Circuitsstream

TDA2030 complete tone control

At this time I present a series of amplifiers that use IC TDA2030, but this series is equipped with a tone control. Tone controls include Bass, Treebel, and Volume. Power amplifier and tone control has been put together in a single PCB. As well as its power supply circuit was also used as one with the power amp, and tone control. Making it easier in the installation and will look neat. Schematics Layout PCB PCB design This amplifier is a mono amplifier type, can be modif for guitar amplifiers. If not coupled amplifier (mic preamp) then you must deactivated potensio treble and bass, why? because if not using a mic preamp and still maintain potensio treble and bass sound input (input) from the guitar will not or the maximum discharge is not tight on the speakers. So you must deactivated a way to decide which directly connected capacitor with the tone control circuit, and capacitor were connected directly to potensio volume and input jack.