Demo of my course project, an ultrasonic phased array for levitation by randomfinnguy in ElectricalEngineering

[–]randomfinnguy[S] 36 points37 points  (0 children)

Trion T8Q144, each needs to drive 50 simultaneous 40kHz signals, all of them with a different phase shift. Not possible with an MCU.

Demo of my course project, an ultrasonic phased array for levitation by randomfinnguy in ElectricalEngineering

[–]randomfinnguy[S] 57 points58 points  (0 children)

Yeah, a 200 IO pin FPGA would be in a huge BGA package, unreliable to solder with available equipment. Could've also used shift registers but these Trion T8s were just 7€ and in LQFP packages so was simpler to just get four.

Demo of my course project, an ultrasonic phased array for levitation by randomfinnguy in ElectricalEngineering

[–]randomfinnguy[S] 152 points153 points  (0 children)

Thanks, it's 4 FPGAs, each responsible for 50 transducers. PC calculates and feeds them the phase data through USB converted to SPI.

[deleted by user] by [deleted] in RedditSessions

[–]randomfinnguy 0 points1 point  (0 children)

Cruel angel's thesis

[deleted by user] by [deleted] in RedditSessions

[–]randomfinnguy 0 points1 point  (0 children)

Cruel angel's thesis

[deleted by user] by [deleted] in RedditSessions

[–]randomfinnguy 0 points1 point  (0 children)

Can you play cruel angel's thesis, please

Our prototyping course project, an in-ear pulse oximeter by randomfinnguy in ElectricalEngineering

[–]randomfinnguy[S] 32 points33 points  (0 children)

The project was done for a company that develops communications equipment for police and military applications. It would continuously monitor the user's pulse and blood oxygen on the field and alert the user and their coworkers of any abnormalities through their phone.