This is an old revision of the document!
electric_schematic_aio_box_v2.pdf
This diagram is a lot more simpler than the V1 version (for which I didn't make one).
There is the need to add a relay to cut the battery pack if there is an external power supply connected, to prevent damaging the battery pack.
Also, a new switch is added, SW4 to activate the charging process with the internal lithium charger.
That way, the SW2 and SW3 are not sources of errors, if they are on either the PSU is connected (to avoid injecting DC in the battery pack).
Designation | Qty | Link | Notes |
---|---|---|---|
Lithium charging board 3S 2A | 1 | link | to charge the battery pack |
Lithium cells 18650 3300mah | 6 | link | to make a 6600mah 12.6V battery pack |
BMS lithium 3S | 1 | link | to balance and protect the battery pack |
Relay 12V | 1 | link | to cut off the battery pack when an external PSU is plugged |
XT60 socket with screw mount | 1 | link | one for external power for FT-818 and second one for the RPI4 |
Switch for charging board | 1 | link | to activate the charge of the battery pack |
Good quality lever switches | 3 | link | To select power supplies or battery, see below explanations |
SO239 connector with base plate | 1 | link | |
40x40mm fan protection + filter | 2 | link | |
40x40mm fan 12V | 2 | link | |
Thermal switch 55°C NO | 1 | link | to switch on fans when temperature is reaching a limit |
12V to 5V step down + USB | 1 | link | To power the RPI4 and eventually to recharge your smartphone device |
RJ45 socket | 1 | link | To directly connect to the RPI through RJ45 |
4mm banana socket | 1 | link | for counterpoise connection |