ESP8266 Community Forum

- Sat Apr 04, 2015 12:46 pm #13477 Thanks for sharing this. I was thinking to try TI LMR14006 which does auto-sleep, depending on load current.

What's the input current consumption with no output load? -- one post mentioned 1~2 mA, not sure if it is measured # and if the no load input current depends on input voltage. Some folks recommend < 30 mA total consumption even with car battery to be feasible for use in a car.

If you're not very pressed on time or project volume, you get 20 of these for 10.8$, free shipment (54 cents each!);
http://www.aliexpress.com/item/20-pcs-Ultra-Small-Size-DC-DC-Step-Down-Power-Supply-Module-3A-Adjustable-Step-Down/32262311443.html
It only converts down, but that what I mostly need.

- Sat Apr 11, 2015 12:06 am #14154 A quick setup for a rechargeable battery power solution:

- LGDB 318650 - Rechargeable 3,7V/2600mA Li-ion Cell
- 318650 Cell holder
- Li-ion Charger/Monitor with protection

It is based on TP4056 1A Standalone Linear Li-lon Battery Charger with Thermal Regulation chip

The TP4056 is a complete constant-current/constant-voltage linear charger for single cell
lithium-ion batteries. Its SOP package and low external component count make the TP4056
ideally suited for portable applications. Furthermore, the TP4056 can work within USB and wall
adapter.

Li-ion Cell Protection is done with dedicated DW01-G battery protection IC.

DW01-G is designed to protect lithium-ion/polymer battery from damage or degrading the lifetime due to overcharge,overdischarge, and/or overcurrent for one-cell lithium-ion/polymer battery powered systems, such as cellular phones.

Details: http://www.esp8266-projects.com/2015/03/mailbag-arrival-new-battery-solution.html

ADC - 0-2 - battery - 0_2.jpg

ADC - 0-3 - battery charger - 0_3.jpg

You do not have the required permissions to view the files attached to this post.

ESP8266 MPDMv4 AC MAINS Dimmer Home: http://esp8266-projects.com/2016/04/mpdmv4-mains-dimmerswitch-html/
Available on Tindie: https://www.tindie.com/products/nEXT_EVO1/universal-ac-mains-dimmer-mpdmv41/

- Sat Apr 11, 2015 11:23 am #14187

What's the input current consumption with no output load? -- one post mentioned 1~2 mA, not sure if it is measured # and if the no load input current depends on input voltage.

Good question! So I measured one.
Vin = 12V
Vout = 5,0 V, I_out = 0,000 mA: I_in =0,23 mA => Pin = 2,8 mW, Pout = 0,0 mW => Loss 2,8 mW
Vout = 5,0 V, I_out = 6,5 mA: I_in =4,03 mA => Pin = 48,4 mW, Pout = 32,5 mW => Loss 15,9 mW

- Thu Apr 16, 2015 7:38 am #14698 I tested 2 modules with Li-po battery connect directly to them.
It's been working good for 2 months.

I also connect solar panels, will post pictures soon.

Make something useful. 'Eat your own dog food' DevKit for IoT.
http://www.nodeusb.com