Your Questions About Solar Panel Calculator

John asks…

can solar powered calculators charge when off?

Does turning it off cut the circuit which the solar panel uses to recharge it?

ssadmin answers:

The ones I have seen don't have a battery, so there is nothing to charge.

.

Robert asks…

Can normal light power solar panels?

Or does it have to be from the sun? I'm talking about photovoltaic cells. The ones in calculators, solar panels, etc.

ssadmin answers:

Well, you see solar-powered calculators run on room light all the time. However, there's not much point in running a solar panel on room light.

Ken asks…

What are some things that use energy?

I need at least 10 and they can't all be using electricity like a solarpanel calculator or a light bulb which uses electricity Thanks in advance…

ssadmin answers:

Computer – electricity…

Gas cooking range – natural gas…

Auto – Gas…

Flush toilet – potential energy in water reservoir that came from water pressure…

Spring mounted screen door closing – energy you put in in opening the door…

Walking – food…

Apples ripening on the tree – Solar…

Watering your lawn – water pressure…

Home weather station recording wind speed – wind…

Clothes whitening in the wash with bleach – chemical…

Sharon asks…

How do I repair a broken solar handheld toy? Sunshine Buddy stopped working:(?

Hi everyone, I have a Tomy Sunshine Buddy that is a solar powered “bobble head” type toy. It works very similarly to a solar calculator as it runs off a little tiny PV panel. However after 6 years it stopped working. I've done some searches and this model is no longer available so i cannot buy a replacement. I took the toy apart and it looked like all the wires were still connected to everything. Is there any hope for repairing my toy?

ssadmin answers:

You could try to measure the output of the PV panel to see if it is providing the proper voltage output to make the toy function. Not knowing how much power it requires to run your toy, you could substitute a battery to first check if the toy functions to determine if the PV panel is defective. See websites below. Finally, if the PV panel is found to be defective, you could externally wire a substitute PV panel to continue using or playing with your toy. IDK. Unless someone else can give you a better idea.

Sandy asks…

can i use small solar panels that are in calculators ?

? i know they are very small but how much energy do they generate?

my calculator uses AA 1,5V battery
i guess i can light up some leds with it 🙂 i will definitely try it

ssadmin answers:

It would DEFINITELY be worth a try, but you FIRST need to measure the output of the Solar cell using a voltmeter. You can by a simple voltmeter at Radio Shack for about $25. Disassemble the calculator, find the two wires coming from the solar cell, and measure the voltage across them using the voltmeter. If it is close to 1.5 (say between 1.3 and 1.6) then it MIGHT be OK.

Note than many solar calculator actually have a rechargeable battery inside. The calculator works off of the battery — the solar cell just keeps the battery charged.

“Cannibalizing” old calculators is a good way to get parts to experiment with . . . . . .

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