BBmagic METEO is an amazing measurement device with Bluetooth Low Energy technology.
How can we power it?
3V CR2032 coin battery
Coin battery holder should be soldered to pads: 21 (+) and 22 (-).
Two AA or AAA 1,5V batteries
Connect ‘+’ to pads: 7 or 21. Connect ‘-‘ to the one of: 1, 8, 20, 22 or 23. Dont miss polarity !!
With linear low power voltage regulator
It is simple: You need TO-92 package regulator with output voltage from 2,5V to 3,6V. Solder it to pads 7 (Vout), 8 (GND) and 9 (Vin) of the module.
Pad 10 is reverse polarity protected power input. Connect ‘+’ to it. Connect ‘-‘ to one of pads: 1, 8, 20, 22 or 23.
Check out quiescent bias current of the voltage regulator. It shouldnt be too high. This can help:
| Regulator | Max. input voltage | Typical quiscent current | Max. quiscent current |
|---|---|---|---|
| MCP1702-3302E | 13,2V | 2 uA | 5 uA |
| LM2936Z-3.3 | 40V [60V wersja HV] | 15 uA | 20 uA |
| LT1121CZ-3.3 | 30V [36V wersja HV] | 30 uA | 50 uA |
| TS2950CT-3.3, LM2950-3,3 | 30V | 75 uA | 120 uA |
| LP2950CZ-3.3RAG | 30V | 93 uA | 120 uA |
And this one is cheaper but not suitable for battery powered devices:
| Regulator | Max. input voltage | Quiscent current |
|---|---|---|
| L78L33 | 30V | 6mA |
9V 6F22 battery
Powerbank
Laptop USB port
