ULPNode schematic

Reply to ULPNode schematic on Fri, 25 Nov 2016 21:28:24 GMT

Sergii — Fri, 25 Nov 2016 21:28:24 GMT

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?

Reply to ULPNode schematic on Sun, 25 Sep 2016 20:59:14 GMT

Sergii — Sun, 25 Sep 2016 20:59:14 GMT

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

Reply to ULPNode schematic on Fri, 22 Jul 2016 13:38:15 GMT

Sergii — Fri, 22 Jul 2016 13:38:15 GMT

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.

Reply to ULPNode schematic on Mon, 20 Jun 2016 07:28:58 GMT

mj — Mon, 20 Jun 2016 07:28:58 GMT

@Sergii said in ULPNode schematic:

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

In the doc of LTC3525 there is info, that quiescent current in shutdown mode is 0.1uA, while the same parameter in MCP1640 is 0.7uA - so worse.
In LTC you have Input Start-Up Voltage 0.85V, in MCP this is 0.65V - so better.
In MPC you get regulated output voltage from 2.0 to 5.5V (with 6M8 and 3M9 resistors you get 0.28uA loss, or you can use mosfet to disconnect resistors completly), in LTC series you have to use different components.
Compare price on http://www.digikey.com LTC $44.1/pcs while MCP $0.57/pcs

LPC seams to have better efficiency for 1.2 V, 10mA ~88% while MPC has ~82%,
but for 100mA both have 80%...

So I would pick MPC because it's regulated, and has lover voltage start and significantly lower price

Reply to ULPNode schematic on Thu, 16 Jun 2016 14:08:38 GMT

Sergii — Thu, 16 Jun 2016 14:08:38 GMT

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

Is there any reason to mix SMD component sizes on the same board. I mean 0608 0805 and 1206
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

Reply to ULPNode schematic on Sat, 04 Jun 2016 11:54:16 GMT

Sergii — Sat, 04 Jun 2016 11:54:16 GMT

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

Reply to ULPNode schematic on Tue, 31 May 2016 17:43:09 GMT

Charles — Tue, 31 May 2016 17:43:09 GMT

@Sergey-Kabashnyuk
Yes schematics will be released, I'm focusing now on some other projects that take all my attention.

You're right, absolutely nothing in common, ArduiNode was really my 1st prototype without Power Management of the CPU .