solar

Ok it looks a mess but it dose Work .... So why am i posting this .... couple of reasons ... first off its my first proper working circuit and i have a few questions about it.

As i have  very little to work with im delighted to get this to work (hopefully that will be changing shortly .... just have to get paypal sorted with my bank and ready to order a few bits and pieces.)

Can a 3,4V (open circuit voltage) solar panel charge a 3,6V NiMH battery pack?

Hi, can anyone help?

I am trying to make my robot battery powered with trickle charge with two solar panels.

I bought a solar cell from Solarbotics.com that has a standard Miller engine etched onto it ( http://solarbotics.com/products/scc2433b-mse/ ), then I got my hands on some transistors and capacitors to use. I soldered everything up onto the board, hooked up my power capacitor and a motor. I have my multimeter connected to the leads of the power capacitor and I can watch the voltage climb up to 2.6V and then stop.

I intend to build a remote 'weather station'

The station will:

• Be completley independant of any external power, ie, it will produce its own power via solar cell(s)
• Measure temperature only
• Transmit its finding over an RF link to an indoors reciever

Instead of using a rechargeable battery supply with charger circuit, i have decided to use a 35F, 2.7V super capacitor to smooth and store power.

I`m trying to convert the wireless doorbell outside from battery to a renewable source such as solar or wind. My problem lies in that the battery required is a 9v.

My first thought was to produce a high enough voltage to charge the 9v but that might require more solar panels than I have. The 2nd idea was to use a lower voltage battery or super-cap as replacement and stepping up the voltage to 9v. I haven`t taken any measurements of current usage but I don`t imagine it could be more than a couple hundred mA while pushing the button and much lower in idle.

HI I NEED HELP! PLEASE?

;-)

Just kidding. This is scraping the bottom of relevancy though.

Could you perhaps point me to a good documentation source for charging a 3.6 V battery in an old Nokia? Or could you solve my problem directly for me?

My dad is about to go walkabout in the south of Europe. He bought a 12 V photovoltaic power source that folds like a wallet. He seeks my help on the simple stuff, like mechanical compatibility of connectors and pinouts. And soldering.