Remember the last $ 100 laptop design? At that time we expressed doubts, but this time finally on the official site, and labeled as "conceptual design", wit…
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.Using the device Transmitter & Reciver:
Remote automatic rainfall monitoring network based on GPRS
Abstract : This article introduces a new type of wireless automatic rainfall monitoring network. The network breaks through the weaknesses of traditional autom… TDA89220 is a Class D (switching type) power amplifier IC produced by Philips. The device integrates analog circuits, digital circuits and t… The main parameters that characterize the performance of the antenna are the pattern, gain, input impedance, standing wave ratio, polarization mode, etc. In this article, the EL34 and transistor (op amp) are cleverly combined, and the result is unexpected and high performance. This 32W power amplifier has a full power bandwidth of 5Hz…
| Ultra-wideband (UWB) … Ultra-long-range high-fidelity reception of FM broadcast The reception of FM broadcasts has been a hot topic in recent years, especially last year. This is because FM broadcasts have better sound quality, higher fidelity, stronger anti-interference, and richer …
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