THINGY 53 : remove the DCDC between Li-ion cell and the system ?

[sarahHtn]

Dear, 

I would like to remove the DCDC converter in between the li-ion cell which is supplying the system and the system. 

The idea is to use our micro battery as the supply and the voltage is about 2.7V. I will use a boost converter to provide a 3.3V but I am wondering if I can remove the U15 IC and provide a 3.3V to VREG. 

Should I also connect the VLi-ion to VREG because the SW needs the BATTERY signal (measuring the voltage of the battery) ? 

About the U15 power switch, what is the purpose of this switch ? 

About the sensors, I would like to switch them off by SW, how to you recommend me to proceed ? I am not familiar with SW design so do you think this is feasible ? 

Thank you for your time, 

Sarah 

[sarahHtn]

Hello Jonathan, 

My apologies, I meant THINGY 52 not the 53... 

I saw on the documentation the voltage regulator U14 XCL210C33 used from the li-ion battery. 

And the U15 used as a switch. 

About the sensors, ok but is there a way to keep part of them like accelerometer, temperature and humidity ? 

On a previous board, I did removed some sensors from the board but I have a consumption of 7mA all the time and the device does not emit so I supposed that I cannot remove them just like that and maybe the SW is waiting from some signals to move to low-power mode and emitting mode. 

Thank you for yout time. 

Sarah 

[JONATHAN LL]

Thanks for the clarification Sarah,

Where are you measuring the power usage?

Have you cut SB2 ?

What code are you using?

sarahHtn said:

About the sensors, ok but is there a way to keep part of them like accelerometer, temperature and humidity ? 

If you are comfortable soldering\de-soldering then you can always just remove them physically, but then you loose some of the sensors.

What do you want to achieve?
Are you using the Thingy52 for a specific task and don't need all the sensors + need a different type of battery for longer operational time?


Regards,
Jonathan