This a is complete FM radio receiver in a single chip. The board features a reset and scan button that tunes to the next radio station in a fraction of a second. Receiver offers excellent sensitivity and impressive loudness from such a small speaker. Just connect red (+) and black (-) leads to 2-5V voltage supply (or two to three AA battery cells), extend green antenna wire and you are ready to listen to your favorite FM radio stations.
Build Accurate LC Meter and start making your own coils and inductors. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils. LC Meter can measure inductances starting from 10nH - 1000nH, 1uH - 1000uH, 1mH - 100mH and capacitances from 0.1pF up to 900nF. The circuit includes an auto ranging and reset function to make sure the readings are as accurate as possible ... [more]