Casas Sheraz

Below is a schematic for an AM transmitter circuit. If you decide to actually build this AM transmitter, please be aware that it is illegal (in almost every country) to broadcast any radio frequencies unless you have a license to do so. Licensed radio amateurs may broadcast AM on certain frequencies only. This tutorial is for informational purposes only.

We also have another tutorial on building FM transmitters. If you’re interested, be sure to check it out.

Here is the schematic for the AM transmitter:

In the circuit above, MK1 is an electret microphone and Q1 is a transistor audio amplifier. The power supply is 12V DC.

Potentiometer R2 sets the drive level, which modulates the base of Q2, affecting the collector current. Transistor Q2 is a Colpitts oscillator with a tuned circuit on the collector with L1 and C3.

Capacitor C4 connects to an antenna.

Speaking into the microphone will broadcast your voice over AM. Audio from another source (like a media player) can be input into the circuit at the wiper pin of potentiometer R2.

This is a very low power AM transmitter, so the signal will probably not be transmitted too far. However, commercial AM stations with 500kW transmitters can cover a few hundred to a few thousand miles in daylight. As the ionosphere “rises” at night time, especially at the higher end of the band, these signals will bounce of ionospheric layers and cover considerably larger, even intercontinental distances.

The simplest antenna would be an end-fed quarter wavelength of wire as high as possible fed against a good ground. A quarter-wave has a low impedance at its feed point, providing a reasonable match to the transmitter.

The antenna can be made from antenna wire. To calculate the length (L) of the antenna, use the equation L = 300/f(Mhz).

So for 1 MHz:

L = 300 / 1 MHz

L = 300 meters

One quarter wavelength of L would be:

300 meters / 4 = 75 meters.

Rather long indeed! Commercial AM stations have antennas covering several acres of land, often on towers hundreds of feet high.

I made a quick lash-up of this circuit to see if it works, and the results are shown below:

Thanks for reading! Be sure to leave a comment below if you have any questions!

It was the Spanish who brought olives to the New World in the 1560's, and around 1770, missionaries introduced olive trees to California. The Mission San Diego de Alcala was the first mission to start cultivating the trees.

We love olive trees because of their delicate and simple beauty. As houseplants and gardening become more popular, so does the search for easy- to-grow, attractive trees to add to interior home design or outdoor landscape. Whether you like the pruned, topiary style or more wild and free, olive trees add style and personality. In the ground or in a pot, an olive tree can thrive and become a part of your family's history and tradition for generations.

Here are 5 reasons to own an olive tree:

Olive trees are low maintenance plants. They are drought tolerant and prefer dry soil and air, regular watering, and six hours of daily sunlight. Their adaptability means that they are cold hardy, yet can handle warmer temperatures as well.

Although they are happiest outdoors in fresh air, olive trees can also be kept indoors by a window. They will fruit whether they are in a pot or in planted in the ground. There are also decorative fruitless olive trees.

Giving an olive tree is an offering of peace and friendship. Olive trees are frequently used in wedding ceremonies to symbolize love and tradition. A small olive tree makes a lovely Wedding, Housewarming, Mother's Day, "I'm Sorry" or "Thank you for your Hospitality" gift.

The silvery, feather-like leaves on an olive tree branch can be the perfect touch for your tabletop decor. It can be the pop that you need in a homemade bouquet. Or the extra touch on a beautifully wrapped gift. Olive tree branches and leaves have so many uses in home decor or DIY projects- a search on Pinterest will attest to that!

1 Click on the Finder icon at the bottom left of the screen (the left most icon on the Dock) · 2 Eject external hard drives, memory cards and

Go to transaction LSMW and click on MY OBJECTS In main menu GOTO-->RECORDINGS, system will display all the recordings with Transaction and Created by

Place the wrapped meat in a large bowl and fill with cold water Change the water every 30 minutes as the meat continues to thaw A 1-pound package of meat can

1. Ask people to subscribe, leave a review or share your show.
2. Ask people to join your online community.
3. Point people to the show notes page on your website.
4. Send listeners to a landing page for free resources.
5. Let them know where they can donate to your podcast.

As for why the game struggled, EA CEO Andrew Wilson said the marketing campaign failed to capture the attention of players The campaign lacked

We offer some tips to avoid being a victim of lovers of foreign things. Identifying some habits that could expose your vehicle and its passengers is also part of the process.

Finding a place to park a car in a city like Mexico is not easy. Users leave their units on the street. Poorly lit or unguarded spaces can be a risk factor for car theft.

Not only luxury or latest model vehicles are targets of criminals, but also other types of vehicles. It's enough to have time and space for your car to disappear. A car that has been stolen can be used to commit other crimes. If you were a car theft victim, you should report it to the authorities.

Time is the thieves' main rival. One more element in your favor is the fact that it is easier to access a car and take it away.

There are different products on the market that can help prevent theft. The sticks are igniting. The use of this type of utensils gives you a percentage of protection. Criminals prefer a unit free of these artifacts, even though it is a vulnerable method.

Saving time and decreasing the chance of being discovered are the main causes.

If you turn the steering wheel and turn the switch off on a newer car, it will cause an automatic lockout. It is always advisable not to leave a vehicle on the street for a long time.

It's important to take into account the transparency and visibility of our environment, but you must take precautions outside of your car. It can encourage thieves to steal your vehicle if you leave your valuables in plain sight.

Being on board your unit does not exempt you from this crime either. You could be the victim of a violent carjacking if you have a habit of keeping your phone and valuables out of sight.

This one is not flawless.

The anti-burglary film on the car increases the time it takes to break the glass. This can be the difference between being robbed or not.

On the other hand, if the car is parked, the offenders will have to break a window in a few minutes. It can give you time to escape in an emergency situation if you're on board.

If you decide to place an anti-robbery film in a specialized store, you should do it there. This is not a shield against firearms. In a dangerous situation, we recommend acting prudently. Never put your integrity at risk after a material loss.

If you want to be selected by criminals, you should check whether the elements of your unit have the serial number of your car recorded. If headlights, mirrors, glass or other components are tattooed with this information, that's a problem.

Criminals prefer the theft of a car free of this engraving since it will facilitate the sale of the parts, which is why the black market for auto parts is so important. The investment of time and resources isn't attractive to criminals.

This type of protection is more common in recent cars, however, it is applicable to any unit The majority of the time, the price is lower than other security methods. Some agencies will even do it for free if you ask.

Car theft is not always a coincidence. It is a plan that was previously designed under a follow up.

The routine of the users is one of the elements that make car theft possible. Schedules, routes and lifestyles affect crime to find its next victim. Establishing a routine will make you predictable.

The change of routes and travel times are among the recommendations. If you want to avoid repeating routines for more than a week, you should. You should keep an eye on strange parked cars. This will let you know that you are being watched.

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