Practical Radio Advertisement Suppressor: Traditional Chinese Circuit
In short: Traditional Chinese Practical Radio advertisement suppressor. This entry documents a circuit & prototype taken from Chinese practical-technology literature, written for small-scale makers and home producers. The text below is the full English translation of the original Chinese workshop notes, covering materials and quantities, the step-by-step sequence, and the practical cautions recorded in the source. Roughly 4212 words of English technical text, translated and preserved without editing. It is intended for experimental and reference use, not for regulated or commercial certification.
radio advertising suppressorGeneral radio users mostly like to listen to music and news programs, but hate those advertising programs that are inserted from time to time. Here is a small device for you to solve this trouble.When you touch one of the touch electrodes TP1 on the device with your finger, the radio starts to work, can work for half an hour, and then automatically shuts down after half an hour.If the radio is working and you don't want to listen to the program (such as an advertisement) temporarily, you can touch another touch electrode TP2 of the device with your finger. At this time, the radio automatically stops working for about 1 minute. That's long enough for most commercials.The two touch electrodes TP1 and TP2 can be made of any thin metal sheet. Each touch electrode is made of two metal sheets (which can be rectangular or semicircular), and the distance between the two sheets is about 1.5 mm. In this way, when you touch the electrode with your finger, the resistance of the finger is connected across the two halves of the electrode, causing a response on the corresponding circuit.It is mounted on a small piece of printed circuit board, and because of its small size, it can usually be placed in a gap in the radio. During installation, cut off the connection between the radio and the negative terminal of the battery, and connect it to the collector plate of the triode 2N2222 in this installation. …
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Lei Cheng
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