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bpkdasbaum

Member Since 21 Oct 2011
Offline Last Active Jan 02 2012 07:43 PM
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Posts I've Made

In Topic: Getting started with Netduino Mini (early instructions)

26 November 2011 - 10:25 AM

I am trying to setup my netduino mini, but when i press open port in putty, i get windows blip and nothing happens, no error message. What am I missing?

This is my circuit

Posted Image


and the actual setup on a breadboard

Posted Image

Installed:
Microsoft Visual C# Express 2010
Microsoft .NET Micro Framework v4.1 SDK
Netduino SDK v4.1
Putty


EDIT: Uhm nevermind i was in the wrong putty options >_>!

In Topic: Need help with electronics please

10 November 2011 - 09:05 PM

I forgot to mention one thing: The above circuit has manual switch (SW1) to disconnect the load from the battery, I'm assuming it is used to do so during charging. I don't know how exactly will LiPo cells behave when being charged under load (the switch accidentally left on), but in all likelihood it is not good idea - most charging circuits I've seen contain a switching element (i.e. MOSFET, either built-in or external), which automatically disconnects the load from batteries and connects it to the external power supply, and vice-versa (automatically connects the batteries when external power supply is detached).


the original circuit had the same switch and it was supposed to be working while charging (even had an extra animation, thats what the charging detection circuit is for). From what i read about lipo batteries it is possible to power a circuit while charging.

In Topic: Need help with electronics please

10 November 2011 - 09:02 PM

Like this?

Added Step down DC DC Converter R-78B5.0-1.5

95% efficiency
4.75-18V Input - 5V Output




Posted Image

In Topic: Need help with electronics please

10 November 2011 - 04:22 PM

Update:

I found a balance charger circuit in an rc forum!

Can anyone tell me if it will work like this? I was already told i need to "adjust/change the resistors divider of LM2577" in the charging circuit , no idea how to do that yet

eagle schematic here

Posted Image

In Topic: Need help with electronics please

06 November 2011 - 08:40 AM

Woot sry, missed you in the chat, seen you leave the chat just now >_>

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