AM Radio Circuits
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The SA1140 is an IF system IC designed for FM car stereo receivers. It features versatile muting characteristics which CAN be varied with external parts. By Silan .. -
Telephone Tone Ringer TA31001 The UTC TA31001 is a bipolar integrated circuit designed for telephone bell replacement. It CAN also be used as alarms or other alerting devices. By LianShun Electronics Co. , Ltd .. -
P89LPC901, Vacuum Cleaner, Soft start, Harmonic suppression, Low cost A low cost P89LPC901 based vacuum cleaner system is introduced in this application note. Design hardware and software are fully discussed. This system CAN also guide the design of other.... -
FM and AM transmitter in one small device built of cd4001 integrated circuit. It broadcasts on 20MHz(AM) and 100Mhz(FM).... -
This is a compact three transistor, regenerative receiver with fixed feedback. It is similar in principle to the ZN414 radio IC which is now no longer available. The design is simple and sensitivity and selectivity of the receiver are good. All general.... -
The Muntz one-tube design can be considerably improved by adding an audio preamplifier stage. This will give improved sensitivity, and thus give full modulation with lower-level signal sources (such as some older CD players, ceramic phono cartridge, etc. )..... -
@ goldsmith If you need a complete circuit , i have thousands of these circuits in my designs . i can give you some of them easily , but you have told .... -
As with your square wave, you will interfere with people`s radios, & they will become quite upset, plus you may attract the attention of the licencing authority-& believe me, you don`t want that! you need I believe a colpits oscilator, this will have a "tank.... -
The circuit exemplifies the use of ZN414 IC to produce a handy AM radio receiver. ZN414 IC a composition of transistor tuned radio frequency (TRF) circui.... -
The circuit presented here makes amplitude modulation possible, and it also has the significant advantage that it replaces the somewhat exotic and quite e.... -
This circuit is essentially an amplified crystal set. The inductor could be a standard AM radio ferrite rod antenna while the tuning capacitor is a variab.... -
There are not many AM transmitters that are easier to build than this one because the inductor is not tapped and has a single winding. There is no need to wind the inductor as it is a readily available RF choke (eg, Jaycar Cat LF-1536). To make the circuit.... -
This portable am fm radio circuit is designed using the LA1800 IC and some other external components. As you can see in this circuit diagram the LA1800 manufactured by Sanyo Semiconductors, require few additional components. Also the output signal is driven.... -
This MK484 AM radio circuit provides a complete solution including : RF amplifier, Detection and AGC circuit (automatic gain control ), which requires only a few external components to give a high quality AM Tuner. The circuit has an input impedance of.... -
This Am radio receiver circuit is based on the TDA1083 radio IC that can be used to build a simple MF band radio. This AM radio schematic circuit based on the TDA1083 will work in 300kHz 3MHz frequency range. This AM radio receiver circuit is very simple and.... -
Using TEA5551T monolithic integrated radio circuit can be designed a AM radio receiver circuit which is designed for use as a portable radio receiver with headphones. The TEA5551T radio receiver circuit contains all is needed for a AM radio receiver circuit.... -
I finally completed a working AM transmitter. The transmitter`s design is based on several ideas, but mainly based on Phil`s Li`l 7 Transmitter design. It is not always easy to achieve oscillation in LC-based transmitters without the right combination of.... -
This low-cost AM transmitter is tunable from 10 to 15 MHz with the help of ½J gang condenser VC1, which determines the carrier frequency of the amplitude modulation transmitter in conjunction with inductor L1. The frequency trimming can be done with VC2. The.... -
This two transistor AM radio circuit is also called ""mini-radio"". It uses only 2 transistors and few passive components which makes is very easy to be cons.... -
This transmitter is basic but allows transmission of audio to an AM radio. It consists of an RF oscillator operating in the AM broadcast band, together with a modulator stage, which mixes the incoming audio and the RF .. -
There are many people who want to listen whats going on in VHF 108 - 132 MHz. This vhf am converter converts a band between 106 and 150 MHz, so you can lis.... -
Back in the day when AM was king, no expense was spared on transmitting equipment. I remember the GE BTA-25 transmitter from the same era, it was build like a tank. Once, while we were repairing the Harris MW-50A main transmitter, the old GE burped,.... -
This is a compact three transistor, regenerative receiver with fixed feedback. It is similar in principle to the ZN414 radio IC which is now replaced by the MK484. The design is simple and sensitivity and selectivity of the receiver are good. All general.... -
A 0th-level attack at designing a direct conversion AM radio receiver. "Direct conversion" means we use a mixer (which just multiplies two signals) to downshift the radio frequency signal to baseband (audio) frequencies. I still don`t really know how to.... -
A modification to David Knight`s linear detector circuit. I wanted to build a "hi-fidelity" AM receiver and needed an ultra-linear AM detector for it. Here is the circuit I came up with: Note that I eliminated the meter circuit, and removed a lot of the.... -
The Poppet" is a half-watt AM transmitter designed by Mr. Doug Gibson of England. The original design was published in issue 84 of SPRAT, newsletter of the GQRP Club. The version shown here incorporates changes suggested by Steve Hartley and others. Although.... -
An AM modulator for the MW band that will allow hearing the music of a CD or MP3 player during daytime on such radios. This is not a transmitter: the output power is very low (only 10mW) and is intended to be connected to the antenna input of the radio, or....
New Circuits
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This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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