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Pen FM transmitter bug

Posted on Tuesday, May 24th, 2016 in DIY by DP

pen-fm-transmitter-bug

A pen FM transmitter bug project from Talking Electronics:

Pen FM Transmitter bug projects have been very popular. The idea of being able to hide a transmitter in a pen is very appealing. In an effort to reduce the size of this design, we have used surface-mount components. Firstly, the thought of using the coil in the tank circuit for transmitting RF was a little far fetched, but we used it as an example for those who were interested in experimenting with our circuits. Now we have gone back to a conventional antenna, the whip. The whip or straight-line antenna can be coiled, wound longitudinally or folded. The way it is wound makes a big difference to its effectiveness, but when you are limited in space, you have to accept these limitations. Even though we have used this antenna set up in our previous pen bugs we have considerably improved the circuit to the point were it has low battery consumption, but high RF output. The size of this design has been reduced considerably by using surface-mount components.

More details at Talking Electronics project page.

This entry was posted on Tuesday, May 24th, 2016 at 2:03 pm and is filed under DIY. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

2 Responses to “Pen FM transmitter bug”

  1. mrmax says:

    The original author of this project (PEN BUG MkIV) is Talking Electronics and you should link to their web site instead: http://www.talkingelectronics.com/projects/Pen%20Bug%20MkIV/PenBugMkIV.html

    Electronics-DIY just steals projects from other web sites, removes copyright and represents them as their own creations.

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