How Does Project 122 Snap Circuit AM Transmitter Work?

In summary: The graph in that post suggests it would be OK.Interesting. I may have to simulate it to see what is going on.
  • #36
StandardsGuy said:
The diode serves no useful purpose and looks to be in backwards, but no polarity of voltage is shown.
Both the diode and the transistor will be forward biassed and will operate with the +3V supply. The LED, (as shown in the video), illuminates when there is sufficient audio input. The LED is forward biassed, so it gives a couple of volts compliance for the oscillation of both phases. Build it and take a look, or simulate it and you will see.

StandardsGuy said:
There is little current limiting in the circuit, so the transistor may fail from excess current, except that the transistor has no bias.
The transistor bias current is limited by the audio source provided in the kit. The LED and the +3V supply in the kit limit the collector current. It is the half wave bias that generates the AM signal.

StandardsGuy said:
The inductor is a very poor antenna.
Yes, but it is more than sufficient to demonstrate the AM modulation on an AM receiver where only 10 uV of antenna input is needed.

StandardsGuy said:
How does it work? Poorly if at all.
If it worked any better it would need more than a "very low" EIRP class license.
 
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Likes topito2 and Tom.G
<h2>1. How does the Project 122 Snap Circuit AM Transmitter work?</h2><p>The Project 122 Snap Circuit AM Transmitter works by converting audio signals into radio waves that can be transmitted through the air. The audio signals are first amplified and then modulated onto a carrier wave, which is then transmitted through an antenna. The receiver on the other end picks up the radio waves and converts them back into audio signals.</p><h2>2. What components are needed to build the Project 122 Snap Circuit AM Transmitter?</h2><p>To build the Project 122 Snap Circuit AM Transmitter, you will need a power supply, an audio source (such as a microphone or MP3 player), a transistor, a capacitor, a resistor, an antenna, and a breadboard or circuit board to assemble the components on.</p><h2>3. How do I assemble the Project 122 Snap Circuit AM Transmitter?</h2><p>To assemble the Project 122 Snap Circuit AM Transmitter, you will need to follow the instructions provided in the kit. The components will need to be connected in a specific order and layout on the breadboard or circuit board. Make sure to double-check all connections and follow safety precautions when handling electricity.</p><h2>4. Can I adjust the frequency of the Project 122 Snap Circuit AM Transmitter?</h2><p>Yes, the frequency of the Project 122 Snap Circuit AM Transmitter can be adjusted by changing the values of the components used. For example, the frequency can be increased by using a smaller capacitor or decreased by using a larger capacitor. However, it is important to note that the frequency range of the transmitter is limited and should not interfere with other radio signals.</p><h2>5. What is the range of the Project 122 Snap Circuit AM Transmitter?</h2><p>The range of the Project 122 Snap Circuit AM Transmitter can vary depending on the environment and components used. Generally, it can transmit audio signals up to a few meters in an open space. However, this range can be extended by using a more powerful antenna or amplifier.</p>

1. How does the Project 122 Snap Circuit AM Transmitter work?

The Project 122 Snap Circuit AM Transmitter works by converting audio signals into radio waves that can be transmitted through the air. The audio signals are first amplified and then modulated onto a carrier wave, which is then transmitted through an antenna. The receiver on the other end picks up the radio waves and converts them back into audio signals.

2. What components are needed to build the Project 122 Snap Circuit AM Transmitter?

To build the Project 122 Snap Circuit AM Transmitter, you will need a power supply, an audio source (such as a microphone or MP3 player), a transistor, a capacitor, a resistor, an antenna, and a breadboard or circuit board to assemble the components on.

3. How do I assemble the Project 122 Snap Circuit AM Transmitter?

To assemble the Project 122 Snap Circuit AM Transmitter, you will need to follow the instructions provided in the kit. The components will need to be connected in a specific order and layout on the breadboard or circuit board. Make sure to double-check all connections and follow safety precautions when handling electricity.

4. Can I adjust the frequency of the Project 122 Snap Circuit AM Transmitter?

Yes, the frequency of the Project 122 Snap Circuit AM Transmitter can be adjusted by changing the values of the components used. For example, the frequency can be increased by using a smaller capacitor or decreased by using a larger capacitor. However, it is important to note that the frequency range of the transmitter is limited and should not interfere with other radio signals.

5. What is the range of the Project 122 Snap Circuit AM Transmitter?

The range of the Project 122 Snap Circuit AM Transmitter can vary depending on the environment and components used. Generally, it can transmit audio signals up to a few meters in an open space. However, this range can be extended by using a more powerful antenna or amplifier.

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