![]() ![]() L Petersen liked Automatic Speech Recognition AI Assistant.metze.klazema liked Automatic Speech Recognition AI Assistant.z26 wrote a comment on Desk-ercising with the Exer-desk.Holger Baxmann liked RAIN Mark II Supercomputer Trainer. ![]() Gregg Eshelman on Walking Desk Is More Annoying Than A Standing Desk.Drone on Tiny Speaker Busts Past Sound Limits With Ultrasound.Drone on 3D Printing A Nifty Sphere Without Supports.solipso on Tiny Speaker Busts Past Sound Limits With Ultrasound.Mario on What It Takes To Make A Raspberry Pi Killer.Johnu on Harvard SETI Project Helps ID Mystery Sound.James on Airloom’s Whacky Wind Clothesline Turbine Idea.metan on A Colorful Take On The E-Ink Photo Frame.Linux Fu: Easy Kernel Debugging 2 Comments For example, at my writing time both Mouser and Digi-Key have the Si4703 in-stock, but buying just one (1) chip will set you back a whopping $13.42 at either place! Qty.-1,000 chips from Digi-Key will cost you $3.38 each, which still feels a bit high to me: And even if you can find one to buy, they are outrageously expensive. The problem with the SiLabs tuner chips is that they are hard to get unless you buy an awful lot of them. SiLabs makes much more sophisticated tuner chips compared with the Si4703, some cover the AM/FM/SW/LW bands and include mono/stereo AM as well as FM demodulation, some accommodate push-button control and there’s even a version that supports an analog-like tuning knob. The SparkFun module will almost certainly have a genuine part on it: If you are worried about getting a module with a fake Si4703 on it (if they exist), SparkFun sells a Si4703 breakout module for $10.95. If you can’t wait for long shipping times from China here are two Si4703 modules from Amazon with “free” Prime 2-day ConUS shipping for $7.89 ($3.95/module). Here’s a Si4703 based FM tuner module from China on Ebay for $2.78 plus $3.47 shipping: On the Web there are plenty of examples and libraries for marrying an Arduino to a Si4703. For comparison purposes with the Si4703, here is the datasheet for the TEA5767, you can see the two chips are entirely different animals: NXP now shows the TEA5767 as discontinued, I do not know who makes them today, if anyone. If I’m not mistaken, the TEA5767 was originally introduced by Philips Semiconductor (now NXP) many years ago. In contrast the TEA5767 is a more traditional analog RF/IF/DEMOD/DEMUX FM stereo tuner. This is the SiLabs product page for the Si4703: I don’t know if fake Si4703 chips exist, but it wouldn’t surprise me. That’s assuming the Si4703 chip on the Chinese modules aren’t fake of course. The Si4703 has a LNA/AGC/IQ/PGA quadrature direct conversion front-end and a sophisticated ADC/SDR/DSP back end. designed Silicon Labs Si4703 chip would give you a performance boost plus RDS decoding. Posted in Radio Hacks Tagged amplifier, arduino, diy, fm, power supply, radio, receiver, small, tuner Post navigationįor a dollar or two more a Chinese FM tuner module with the U.S. For those reasons, it could be a great gateway project into more complex FM builds. While the FM receiver in this project wasn’t built from scratch like some AM receivers we’ve seen, it’s still an interesting build because of the small size, I2C capability, and also because all of the circuit schematics are available for all of the components in the build. With the addition of a small 5V power supply, it’s a tidy and compact build as well. He also integrated a 3W amplifier into this build, and everything is controlled by an Arduino including a small LCD screen which displays the current tuned frequency. For this build, uses a TEA5767 FM chip because of its ability to communicate over I2C. Receiving frequency-modulated radio waves is typically more difficult than their amplitude-modulated cousins because the circuitry necessary to demodulate an FM signal needs a frequency-to-voltage conversion that isn’t necessary with AM. That’s good enough for AM radio, anyway, but you’ll need to try this DIY FM receiver if you want to listen to something more culturally relevant. ![]() Building radio receivers from scratch is still a popular project since it can be done largely with off-the-shelf discrete components and a wire long enough for the bands that the radio will receive. ![]()
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