On Sat, Aug 15, 2020 at 02:35 PM, OneOfEleven wrote:
A scan of the PCB with the covers removed.
OneOfEleven,
? You probably noticed the following:
? 1. The VDD and BOOT pins are available as a last resort for a user that can't access DFU mode in the usual way.
? 2. No SanDisk pads are available, so DiSlords's SanDisk modification for the NanoVNA would require a steady hand and nerves of steel to implement.
? 3. Pads for applying additional shielding are present.? Erik did a ton of experimentation so I'm pretty certain leaving out the shields was not cost savings move.? Still, the pads are there if a user is in an RF rich environment and thinks adding additional shielding will help.
? 4. Lots of space to add a larger capacity battery if longer operating life is needed.
? 5. The sma connectors are soldered securely to the pcb so less chance of shearing off from over torqueing cable connections.
? 6. The display cable does not appear to be connectorized so changing out the display will require above average soldering skills.
? 7. A UART interface is provided for possible RasPi and wireless experimentation.
? 8. A linear regulator is used for less power supply noise.
? Unseen is that the tinySA uses serial console commands so developers familiar with the NanoVNA should face few problems porting tinySA specific versions of their programs (hint, hint).
- Herb
