Timeline for AM radio Transmitter with one station DIY - microcontroller
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 14, 2017 at 7:05 | comment | added | Andy aka | Use a ferrite rod antenna is my advice and get a variable capacitor to tune it or just experiment with fixed values. You can also slide the coil up and down the ferrite rod to achieve a few percent tuning thus allowing fine tuning. The thing is here is that the ferrite rod coil both acts as a receiving antenna and tuner. | |
| Jun 13, 2017 at 21:06 | comment | added | user1473349 | One team has to make the transmitter and we have to make the receiver. The other group used 400 KHz carrier frequency. They used a normal wire (of few feet long) as an antenna. I just want make sure I am using the right circuit. | |
| Jun 13, 2017 at 18:05 | comment | added | Andy aka | That is a start but the values needed depend on the carrier frequency and what type of antenna you have connected. I cannot advise you on carrier frequency because this will be governed by legislation in your part of the world. For a very short distance between transmitter and receiver try looking for circuits on google that suggest they are AM modulators (about 1 MHz) and then you can use an off-the-shelf radio for receiving. | |
| Jun 13, 2017 at 14:16 | comment | added | user1473349 | I have both inductor and capacitor of fixed rates. I don't have the variable ones | |
| Jun 13, 2017 at 14:14 | comment | added | user1473349 | Inductance is just a coil. I should be able to make it. For the transmitter can you please me what carrier frequency I should use to modulate the signal in my situation. The distance between the transmitter and the receiver does not matter. I can place them pretty close. Does the transmitter length has to be lambda/4, which is pretty long. | |
| Jun 13, 2017 at 6:29 | comment | added | Andy aka | If you haven't got an inductor and capacitor then you need to buy them. You can make an inductor quite easily of course but, without knowing your skillset or operating frequency then I cannot advise. Do some googling on crystal radios maybe. | |
| Jun 13, 2017 at 4:05 | comment | added | user1473349 | I don't have variable inductor or capacitor. Is there a way I can have a tuner without variable inductor or capacitor. If the answer is no, I have to make by myself. Please suggest how I will be able to build by myself | |
| Jun 12, 2017 at 7:35 | history | answered | Andy aka | CC BY-SA 3.0 |