[werk_ag]

...as the possibility to install a buck converter for 5V output.

Nice work Engolling

The 5V output with up to 2A, is something which I would like. Do you think we need more batteries to achieve that?
I'm thinking in possible future WeatherDuino devices which may run from 5V and require more power than we could supply via USB.

[engolling]

What do you mean with more batteries?
 
5V/2A should be no problem with the 7805 compatible buck converters available on ali and ebay.
The idea is driving 5V normal over the power line (the TP5100 charging regulator works down to 5V) to supply the device and charge the battery fully in normal mode and that the battery takes over when the power in is lost.

Beginning of next week I will to small corrections and than order the first batch of prototypes... christmas is near

[atbukc]

I don't wish to criticise your hard work, but I just found this, 
https://www.banggood.com/5V-218650-Lithi...rehouse=CN

Looks interesting I have one on order & will report what it is like..

Andy

[werk_ag]

I don't wish to criticise your hard work, but I just found this, 
https://www.banggood.com/5V-218650-Lithi...rehouse=CN

Looks interesting I have one on order & will report what it is like..

Andy

Yes, it looks interesting, however the output current seems in the low limit for a Pro2 Plus receiver, but enough for a Pro2 Compact.

normal load current recommend ≤ 1A, when output 6V ≤800mA, output 9V ≤500mA, output 12V ≤400mA

Lets see what our experts in Li-On batteries will say about this device.
I believe the UPS designed by Engolling have some vantages: Allows greater output power and allows 9V input (I think other voltages can be used too), instead of 5V only. So, for a Pro2 Plus system, it can simply be inserted between the current power supply (9V) and the receiver.

[engolling]

I don't wish to criticise your hard work, but I just found this, 
https://www.banggood.com/5V-218650-Lithi...rehouse=CN

Looks interesting I have one on order & will report what it is like..

Andy

Hi Andy,
indeed you are right - the PCB exactly does what mine does. But as werk said, the available power could be a bit low. 
I have at least 6V*3A = 18W available. 
The device you postet has 5W and an input of 5V. The system I designed hast an input band from 5-20V.

I also think you can get a PCB with higher specs we could use here if we do more research. But you also could get another weather station which is already battery buffered. 

And that's mostly the main reason i build something - because I like to test is and I'm curious if it works as expected. And moreover I think im closer to the relevant standards with my system e.g. overtemperature control and a second fuse  .

And - i hope to get the pcb order ready within the next 2 days.

regards,
engolling

[engolling]

Soooo the first PCB prototypes are ordered  .
I added an extra DC Plug for input because of the special wish of T3G so you can use your power supply without modification.

I'm curious if everything is correct or something burns...

If somebody else then Werk would like to try some prototypes just write a PM

Regards,
engolling

[hornychz]

Congratulations! 

By default, I use a "slightly"  more powerful UPS, but your wiring may come in handy in the future, once I've done something like this in WD...
How much will one board cost, please?

1) For RX: UPS 12V / 35W
   

2) For TX: Dual input solar charge controller 12V 8A
   

[engolling]

The first prototype is finished and working:


The following things need to be changed:

•  Footprint of the DC connector
  
•  Holes for the big overdimensioned diode are too small
  
• Concept for 5V systems
  • At the moment the voltage is stepped down from the 2s connection but batteries do not charge when the charger is supplied with 5 volts.
    
  •  The new idea is to change the batteries to parallel Connection - so we would only another protection device in this case and a switch for the connection change but the rest could stay the same
    

Regards, engolling

[hornychz]

The first prototype is finished and working:
....

Congratulations! 

[werk_ag]

• Concept for 5V systems
  • At the moment the voltage is stepped down from the 2s connection but batteries do not charge when the charger is supplied with 5 volts.
    
  •  The new idea is to change the batteries to parallel Connection - so we would only another protection device in this case and a switch for the connection change but the rest could stay the same
    

Regards, engolling

My wish list:
Input voltage between 9V and 13.8V (or even higher)
Output Voltage, adjustable between 5V and 12V (or near Input Voltage if higher), 2Amps.
That would be an almost universal UPS, usable for a large range of electronic devices, including the WeatherDuinos.