powering motion sensor kit with a single lithium battery

[Valerio Catalano]

Hi all,

I've bought a motion sensor kit from JemRF. https://jemrf.github.io/RF-Documentation/wireless_motion_sensor.html.

I'd like to power both the motion sensor (5-20V) and the wireless switch (2.2-3.3V) with a lithium battery (3.7V)

I was thinking about:

connecting the wireless switch directly to the battery

using a step up circuit (from 3.7 V to 5 V) between the battery and the motion sensor.

Do you think this is feasible?

otherwise how do you suggest to power both circuits with a single lithium battery?

Thanks a lot,

Valerio

[Glenn Seaton]

Valerio,

The 3.7 volt battery would destroy the sensor processor, its limit is 3.5 volt.

The best option would be a usb battery pack and a 5 volt to 3 volt DC to DC converter like the ones JemRF uses on the WiFi Devices.
Details at: https://www.jemrf.com/collections/accessories/products/dc-5v-to-3-3v-step-down

Glenn