The extra board is an NRF24L01 dongle. I plan to use this radio for wireless accessories planned for the future, such as a motion sensor and remote control for the menu system. Since the ESP32 has WiFi/Bluetooth on board, the microcontroller's internal radio will be used for getting NTP to update the internal DS3232 RTC periodically.
I tried to lay out the tube driver board using just the mill max pins in plated through holes. However, even with 4 layers, the physical ZM1350 pinout chops up a lot of room for running traces. I did not want to widen the board for aesthetic purposes, so I had to figure out another way to make room for trace routing. I came up with this surface mount style of interface so I did not have to break up all the copper planes with through holes. Trickiest part is soldering on the Harwin connectors. There are no physical locating features on the board, because that would also require drilling through. There is only a small annulus on the top copper to visually align the circular body of the Harwin connector. Each one has to be hand soldered carefully to make sure it is in the right position. A glass of wine definitely helps to steady your hands! On Sun, Feb 9, 2020 at 7:35 AM Paul Andrews <[email protected]> wrote: > A couple of questions: > > 1. What is the additional card on the CPU section that would mount on the > 2x4 header? > 2. Did you try mounting the ZM1350 directly into mill-max sockets before > deciding on the specific mounting scheme you use? > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/78878c28-12e3-405b-ba2c-90ca278c6b99%40googlegroups.com > . > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CALcVLKKtBHF_D1zwXbucu6j2uSUgVzJ_yi3n%2Bx-cRwfh7KrSNA%40mail.gmail.com.
