My 2c worth... Regardless of the hardware, consider making the form factor as close as possible to a standard hand Mic. With plastic shell, nice PTT button on the side, simplified cabling, etc.
Assuming that one aim is to be a drop in replacement for existing mics. This would also need doco to explain how to interface with various transceivers. Regards, Steven P. On Sun, 19 Jul. 2020, 19:26 Mike O'Connor, <[email protected]> wrote: > On 19/7/20 6:06 pm, glen english wrote: > > Hi Mike > > > > Linux in the ZYNQ is instant on, well almost, 0.5 - 1 sec boot. > > > > The distros used are usually Buildroot based, The idea is to keep it > > as close as possible to the PC mainline. > > > > FPGA accelerators can be abstracted out as software modules on the PC > > > > Even the small $15 FPGA can 'wipe the floor' with a RPi4 on specific > > tasks. > > > > The ZYNQ has 1 Msps ADCs (with balanced inputs) we can use for audio > > in, and for audio out we can use R-2R resistor networks as DACs... > > > > And as for digital radio interfaces, that's best done with a DUC/DDC > > in the FPGA, and with low sample rates, we can keep the hardware > > requirements low. > > > > I am going to try and keep the BOM < USD$50 for the SM1000/digital > > side, and for the digital radio piggyback board, ADC/DAC, < USD60. > > Most of the cost of the digital radio side is the quality clock > > oscillator, and 16 bit DAC. > > > > -glen > > Sounds like you have the ideas well worked out. > > Cheers > > Mike > > > > > _______________________________________________ > Freetel-codec2 mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/freetel-codec2 >
_______________________________________________ Freetel-codec2 mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freetel-codec2
