HiLetgo Si5351A I2C 25MHZ I2C High Frequency Signal Generator Breakout Board Square Wave Frequency Generator Signal Generator 8KHz to 160MHz 3-5VDC

It did the work it was purchased to do and it met and exceeded the specifications.

This is what you want. Screen tearing? No more?! Just suffer through the agonizing soldering process.

Based on the reviews and my experience, quality of these seems mixed. The clock output during my testing was between 10-20hz off. I ordered an Adafruit version (which this is based on) and with the same settings it was only a couple of hundredths off. Returning this one and keeping the real deal from Adafruit.

I calibrate the unit upon delivery using my calibration DIY kit. All of the ones I've ordered are about 1KHz high. Very good consistency. Once I have a correction number and apply it to the Si6361 set_correction() function, I'm within 0.5Hz.

Amazon did have the best price for it, also the shipping was fast, very happy with the purchase, 5 stars for sure

Todo De Excelencia, Dede Su Textura a La Calidad Del Producto

This device came as shown, but the SMA connectors are not soldered in place. The image does not show solder on the SMA connectors, so whomever took the photos probably dry fit it together. Not necessarily a bad thing, but a bit misleading .The device requires configuration, every time it is started (there is Arduino code to do this).Default behavior is to wait for configuration - no output.Where all clocks come from a PLL, sometimes there is a good bit of jitter.The base oscillator is a crystal. There is no direct way to tie the crystal to the output. All clocks must go through a PLL (or similar) to be multiplied 15 to 90 times. Then to a (4/6/8) divider. To get 25 MHz another divider is necessary.There does not seem to be a published process to burn the OTP NVRAM.The proprietary software from the manufacturer is substantial, but lacks practical details - like what cable to use to connect to the device.The datasheet is - enigmatic. A few more details in the block diagrams would be nice.It is not clear what the device was developed for, perhaps some sort of VHF radio...This device is an odd duck...

The one I received did not generate a good signal; it would vary wildly from 37hz to over 100hz when I needed stable 60hz for my television. I've heard this may be because it is a lower-quality clone chip, which would make sense. I purchased a separate clock gen that worked perfectly fine (search for Si5351 on amazon and you should be good). I'm not saying every one from this seller is bad but you're rolling the dice.

Funziona perfettamente. Per i principianti e' indispensabile l'uso di librerie e programmi di esempio gia' pronti (Arduino o altro). Scrivere in C o C++ le funzioni per gestire via I2C l'impostazione delle frequenze e' piuttosto complicato e richiede una conoscenza approfondita del funzionamento del dispositivo.

Una volta collegato all'Arduino Atmega 2560 ha funzionato al primo colpo utilizzando le librerie AdaFruit quindi è totalmente compatibile.Consiglio di scaricare sal sito della SI il programma che calcola i fattori di moltiplicazione e di divisione per ottenere in uscita le frequenze desiderate.

Il prodotto è conforme alla descrizione. Buon prezzo e arrivo estremamente veloce.

La schedina arriva con i connettori dupont e gli sma da saldare.Per che non lo sapesse è in grado di trasmettere radiofrequenza con circa 10mw.Lo sto usando per test su beacon radioamatoriale a 144mhz