That is a good idea, but unfortunately, currently, the Raspberry design has no option to connect an external antenna, maybe to hack the RPi would be possible, but one of the main points was during the development is to use the RPi as is, then everybody can attach it.
That is a really good point, currently, the GPS and the fan are on the same side, and to use the internal GPS antenna the top of the box should point upwards.
The input connector is an XT60 type, such a connector is needed because the board can handle 15A, and a usual DC jack (2,5mm/5,5mm) can carry only 5A.
I have quickly checked on Amazon and there is XT60 to cigarette lighter cable.
To be honest, this type of connector was not known by me till today, but I like it, I can imagine replacing the XT60 with a 45A type of Powerpole.
The only question is this Powerpole connector more common in astrophotography? Because if it is, then makes sense to change it.
(XT60 is I think absolutely not common, but in every RC shop it is available)
I like the original design OP has. Powerpole connectors are great but seems like it would take up more real estate on the hub itself. Those connections are somewhat wide. The 2.1mm connection seems better IMO with the reverse polarity protection
Mount: Skywatcher HEQ5 Pro | Main Scope: William Optics GT81 | Guide Scope: ZWO OAG | Imaging Camera: ZWO ASI183MM Pro | Guiding Camera: ASI120MM-Mini | Accessories: ZWO EAF, ZWO EFW 8 x 1.25", Pegasus Pocket Powerbox advance, RPi4
Hi tikiss and all,
very good work, I'm interested in one maybe two machine-populated units.
Just some notes:
ATM 4 GPIO left unused. If GPS reset is not used and 3Dfix led can be sacrificed, we could have 6 gpios to let the unit control focuser stepper motors using already available Radeck Astroberry Focuser indi driver. On the power shield side, only a JST like connector to link one of those mini stepper controller modules is needed.
MCP3202 can be replaced with 3208, and populating 1 INA328 and OP-AMP per channel we'll have amps readings per-device instead of total. Maybe it's an overikill, don't know.
the OneWire pin can be used to chain one or two DS18B20 temperature sensors to monitor stuff that has to be kept dew-free: since ambient temperature and relative humidity are already avavilable, we can calculate dew point temperature and automatically regulate heaters at minimum power needed to keep dew away. Obviously lacking (or not working) the sensor, the channel works in manual power mode. I've already done it with Arduino, code is simple and I can contribute it.
I have also checked these, but I was mainly focused on which can be used on PCB side, the only disadvantage is the population on the board could be a little bit difficult compared to XT60 which is a solid block together with pins.
I will order a couple of samples to see how it looks.