Comments on: Robustness and power efficiency considerations & DC conversion efficiency http://villagetelco.org/2009/07/robustness-and-power-efficiency-considerations-dc-conversion-efficiency/ an easy-to-use, scalable, standards-based, wireless, local, do-it-yourself, telephone company toolkit Thu, 09 Feb 2012 14:06:04 +0000 hourly 1 http://wordpress.org/?v= By: Steve http://villagetelco.org/2009/07/robustness-and-power-efficiency-considerations-dc-conversion-efficiency/#comment-107 Steve Wed, 23 Sep 2009 21:03:18 +0000 http://villagetelco.org/?p=260#comment-107 @oka61 @Jonathan You've put your finger on it. A reliable source of power is critical. For the time being though, other than creating a device that consumes as little power as possible, we chose to make the power source issue a separate problem. We hope to apply (or perhaps it will be that someone else will apply) the same passion and creativity to addressing this issue once we have the Mesh Potato delivering out-of-the-box, no-brainer, self-meshing phone networks. @oka61 @Jonathan You’ve put your finger on it. A reliable source of power is critical. For the time being though, other than creating a device that consumes as little power as possible, we chose to make the power source issue a separate problem. We hope to apply (or perhaps it will be that someone else will apply) the same passion and creativity to addressing this issue once we have the Mesh Potato delivering out-of-the-box, no-brainer, self-meshing phone networks.

]]> By: oka61 http://villagetelco.org/2009/07/robustness-and-power-efficiency-considerations-dc-conversion-efficiency/#comment-106 oka61 Wed, 23 Sep 2009 20:52:09 +0000 http://villagetelco.org/?p=260#comment-106 Jonathan ! You spotted one of the biggest potential drawbacks!I will suggest as a solution for it, an external power pack, in a similar casing as the MP which can be pole/wall/table mounted ,close to the MP.This means you do not have to buy it if your situation does not demand it.Ideal candidate for the battery could be the common & cheap deep cycle battery found in inverters/UPS everywhere in africa .This coupled with the appropriate charging circuit should handle anything the MP@ 3.15w can throw at it for a couple of days without any other source of power available. Jonathan ! You spotted one of the biggest potential drawbacks!I will suggest as a solution for it, an external power pack, in a similar casing as the MP which can be pole/wall/table mounted ,close to the MP.This means you do not have to buy it if your situation does not demand it.Ideal candidate for the battery could be the common & cheap deep cycle battery found in inverters/UPS everywhere in africa .This coupled with the appropriate charging circuit should handle anything the MP@ 3.15w can throw at it for a couple of days without any other source of power available.

]]> By: Jonathan Tagarisa http://villagetelco.org/2009/07/robustness-and-power-efficiency-considerations-dc-conversion-efficiency/#comment-105 Jonathan Tagarisa Mon, 14 Sep 2009 17:04:04 +0000 http://villagetelco.org/?p=260#comment-105 From what I have read so far it does not look like the MP has an internal battery for use in the event of a power failure. I personally know so many areas that can use the MP but whose power supplies are limited to certain times of the day. While a solar panel may be the obvious solution for such an area, the size of a panel like the one appearing here http://www.flickr.com/photos/shuttleworth/3749393908/ can only help attract vandals and push costs a bit up. With an internal rechargeable battery, the MP can recharge while power is available and discharge the power when the supply is cut for a further 4 hours or so. I am not sure about the costs but they surely cannot be far off from the modern day mobile phone though I do admit that the constant transmission and receiving that will be taking place on an MP may pose a challenge to battery standby time. From what I have read so far it does not look like the MP has an internal battery for use in the event of a power failure. I personally know so many areas that can use the MP but whose power supplies are limited to certain times of the day. While a solar panel may be the obvious solution for such an area, the size of a panel like the one appearing here http://www.flickr.com/photos/shuttleworth/3749393908/ can only help attract vandals and push costs a bit up. With an internal rechargeable battery, the MP can recharge while power is available and discharge the power when the supply is cut for a further 4 hours or so. I am not sure about the costs but they surely cannot be far off from the modern day mobile phone though I do admit that the constant transmission and receiving that will be taking place on an MP may pose a challenge to battery standby time.

]]> By: auser http://villagetelco.org/2009/07/robustness-and-power-efficiency-considerations-dc-conversion-efficiency/#comment-104 auser Thu, 23 Jul 2009 11:31:12 +0000 http://villagetelco.org/?p=260#comment-104 Hello Elektra Thank you very much for giving does details on the developement and *.txt Files detailing the reasoning behind the protection circuitery / power supply topology! I learned a lot from (mostly regarding protection). It reminded me of my years as electronics apprentice. I used to ask the local guru/master but why all this circuitery it does not seem to be needed. Shure enough there always was a reason for what was there... so again thank you for sharing. Hello Elektra
Thank you very much for giving does details on the developement and *.txt Files detailing
the reasoning behind the protection circuitery / power supply topology! I learned a lot
from (mostly regarding protection). It reminded me of my years as electronics apprentice. I used to ask the local guru/master but why all this circuitery it does not seem to be needed.
Shure enough there always was a reason for what was there…
so again thank you for sharing.

]]> By: Mike O'Connor http://villagetelco.org/2009/07/robustness-and-power-efficiency-considerations-dc-conversion-efficiency/#comment-103 Mike O'Connor Wed, 22 Jul 2009 07:48:45 +0000 http://villagetelco.org/?p=260#comment-103 "So a MP without FXS interface would be a great choice for a remote solar-powered wireless node. For a solar-powered wireless telephone booth the MP is naturally the best choice…" This is a very good point and one that should be considered if we want the MP to use other sales channels to reduced price. Mike “So a MP without FXS interface would be a great choice for a remote solar-powered wireless node. For a solar-powered wireless telephone booth the MP is naturally the best choice…”

This is a very good point and one that should be considered if we want the MP to use other sales channels to reduced price.

Mike

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