[OpenTRV-dev] OT: Charge battery

[Damon Hart-Davis]

In the note it says that NiMH and NiCd charging are primarily current regulated, SLA and LiON primarily voltage regulated.

Rgds

Damon


On 14 May 2014, at 23:20, Bo Herrmannsen <EMAIL ADDRESS HIDDEN> wrote:

> hmm... buck converter part...
> 
> i can see a fet is used there, but cant figure if it's used to regulate volt or current... its those spec parts i need... something simple to regulate voltage and something to regulate the current...
> 
> 
> 
> -----Oprindelig meddelelse----- From: Kevin Wood
> Sent: Wednesday, May 14, 2014 11:20 PM
> To: Closed list for developer discussions
> Subject: Re: [OpenTRV-dev] OT: Charge battery
> 
> 
> There's an AVR app note that might be interesting:
> 
> http://www.gaw.ru/pdf/Atmel/app/avr/AVR450.pdf
> 
> Best Regards
> 
> Kevin
> 
> On 14/05/14 21:17, Bo Herrmannsen wrote:
>> could voltage be done with a n-channel mosfet and the pwm output pins?
>> if so what abour controlling the current?
>> *From:* Bo Herrmannsen <mailto:EMAIL ADDRESS HIDDEN>
>> *Sent:* Wednesday, May 14, 2014 9:55 PM
>> *To:* Closed list for developer discussions
>> <mailto:EMAIL ADDRESS HIDDEN>
>> *Subject:* OT: Charge battery
>> Hi
>> i have a few LCD’s and some other bits arround i want to put together to
>> make an charger / discharger controlled by and arduino
>> dis charging is easy enough.... and the math to do it also
>> but how about charging... i would like to both be able to regulate
>> voltage and current... depending on what type of battery i have connected...
>> i plan to have the supply voltage at 18-20V to cover most needs... if
>> not i rip that old 18amp car battery charger and use the trafo in that
>> one...
>> anyways what is the simple way to control voltage ? and how would i do
>> current ?
>> /Bo
>> 
>> 
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