Hello,
I know nothing about electronics.
I'm using the TTGO T-Display ESP32 4MB CH9102F Chip V1.1 to drive a Senseair S8 LP CO2 sensor.
From what I read, the TTGO pulls ~80mA while the Senseair uses 80mA average and 300mA at peak.
Since the TTGO has a plug, I was wondering if the combo could be powered by a single li-ion battery without any extra hardware, as an alternative to hanging a USB power bank.
Thank you.
The ESP32 will want 5V or 3.3V with a single battery a 3.3V LDO could be used between the battery and the ESP32 to supply 3.3V or use a step up 5V regulator to supply 5V.
A USB power bank is a set of LiPo batteries in a case with electronics to make 5V. With that battery, I'd use 2 in series, a USB power bank can be made.
Your post was MOVED to its current location as it is more suitable
Thank you. I'm thinking of getting a ~2,000mAh flat LiPo battery instead.
… and since that TTGO has no on/off switch and plugging/unplugging the JST isn't fun, I'd like to add a switch between the two components.
I see switches with two, three or four pins.
Which should I get, and how to solder the wires?
The on off push button would be easier as it has only 2 wires for connection.
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