Hello @Charles
I hope you have a chance to take a look on ULPnode schematics. Do you have any progress on this topic? Any chance to see raw materials or at least photos or schematics?

Hello @Charles
Any progress with ULPNode?
Can you publish current schematics?

Small correction in price LTC ~ 4.16 . Not 44 ))

Model	Output Current	Start-up	  VOUT	        Price	Efficiency (1.2 V, 10mA)	Package	Shutdown current
LTC3525	         400mA	0.85V	3V, 3.3V or 5V	4.16$	88%	SC70	    0.1uA
MCP1640  	 350mA	0.65V	2.0V to 5.5V	0.57$	82%	SOT-23-6	   0.7uA
NCP1400A	 100mA	0.8V	1.9V to 5.0V	0.7$ 	80%	SOT-23-5	  0.15uA
MAX1674	         420mA	0.9V	1.9V to 5.0V	3$	90%	8µMAX	          0.1uA
BL8530	         200mA	0.8V	2.5V～6.0V	0.2$	80%	SOT-89-3     	         7uA

I agree MCP1640 looks like a good choice.

Hello @Charles
I know you are busy during last couple of month.
But anyway I would like to kindly ask you if you have some free time spot to share current version of ULPNode on github.

A couple of additional question about components used in ULPnode

1. Is there any reason to mix SMD component sizes on the same board. I mean 0608 0805 and 1206
2. WDYT Guys from openenergymonitor used a bit more expensive Step-Up regulator
   LTC3525 https://github.com/openenergymonitor/Hardware/tree/master/emonTH/emonTH_V1_5 for sensor node. Would it have some benefits to use it in UPNode

Thanks for response.
Any idea to share your last prototype with community on github?
For instance this one https://hallard.me/ulpnode-projet-update/

Hi Charles,

Do you have any plans to share schematics and board on
https://github.com/hallard/ULPNode
or this is more like commercial product that is not suppose to share such things?

As far as I understand https://github.com/hallard/ULPNode/tree/master/hardware/ArduiNode
is very early prototype of ULPNode and it's far far away from current state?

wdyt how bad idea is to order ArduiNode on seeedstudio to start mastering home automation
and learning fundamentals of ULPNode. Ideally I want to integrate it with https://emoncms.org/

I'm sorry if my questions is too rude