more discussion of #Bluetooth SBC-XQ #audio
on 02026-06-14SBC-XQ is a #Bluetooth hack to get better sound quality out of the SBC codec mandated by A2DP (Advanced Audio Distribution Profile, which I think is “high fidelity playback”) #audio
on 02026-06-14#video on Nordic RF #communications #electronics that can feasibly run off some largish photodiodes used as solar cells. “Ultra low power energy harvester from BPW34. Super small and durable power supply for wireless nodes” on hackaday. Also “Solar-powered flashing LED heart pendant PCB coil” by bobricius in 02018. This guy, "Pocket Concepts", got 300mV out of his BPW34 photodiodes, and used it to transmit a temperature datum over #Bluetooth #BLE to his motherfucking phone. His #Nordic chip uses about 50μC of charge (over the 2.25V to 3.6V range) to run for the necessary 20ms, so he needed 37μF, which looks like maybe it’s a tantalum cap. It gets enough power from his fridge light to send a transmission every few seconds (so, say, 0.4% duty cycle, so he’s getting tens of microwatts). But a slightly larger amorphous cell is even better because it works even in a dimly lit room. #electronics #solar #photovoltaic #energy-harvesting
on 02025-08-09#Bluetooth #BLE can reach over a kilometer with “coded PHY” at 125kbps! #toread #radio #communication
on 02025-07-20Twitter Jack’s #Bitchat protocol white #paper; it “implements a custom mesh networking protocol over #BLE” #Bluetooth #decentralization
on 02025-07-20#video about "openEMSstim" #electronics #hardware for #TENS and similar #neurostimulation. Apparently it can communicate over #Bluetooth #BLE. At 6'20" he’s demonstrating controlling his arm from an Android phone.
on 02024-12-20The nRF24L01+ US$1.50 #hardware #radio can broadcast #Bluetooth Low Energy data with up to 16 bytes per packet.
on 02016-07-11