19 juni 2012
Did it work ?
Well yes: the tomatoes produced enough electricity to make a little toy 'sing'.
Well not exactly: It was verrry quied and verry slow. (and only lasted for 2 day's)
I think that it did not work optimaal for two main reasons:
1) There was a lot of electricity los due to the way the thin copper wires where connected to the galvenised nail and the copper nail. There was a lot of twisting, turning, touching.
2) I probabely made a mistakes in the connection somewhere.
Now that i know this, i could try it again and avoid these mistakes.
29 mei 2012
22 mei 2012
19 mei 2012
I'l need 15.000 tomatoes ! Woeha ha ha. LOL
That is a lot. No really.
I kind of knew that was coming: this is massive.
The multimeter in itself is a challenge to.
So this is what i measured myself :
I was'nt able to measure the resistance ;-)
|Amperes (10 tomatoes in paralel)|
1 tomato = 1 volt (if you leave it still for a bit, if not it's not stable)
10 tomatoes in paralel = 0,14 mA (Afther a few readings and adjustments)
I decided that i was going to keep the math verry simple.
The resistors are all the same: tomato's.
Watt= Volt x Ampere
10 tomatoes in paralell = 0,14 mA
= 0,0014 A
1,2 Volt x 0,0014 Amps = 0,00168 Watt (30 tomatoes)
1 tomato = 0,000056 Watt
The appliance i wanted to use needs 0,84 Watt. That is: 15000 tomatoes !
That leaves only 1 conclusion: time for plan B.
16 mei 2012
But failing. This is clearly not the way to do it. (but it looks nice)
Because measuring amperes turns out to be kind of tricky.
I'm going to try to find them out in another way. By trying to find out the recistance.
So i can use I=V/R formula.
I need to find a way to calculate aproximatelly how many tomatoes i'll need.
And yes it is still a tomato. Green, small, large doesn't make a difference aparentely.
15 mei 2012
What option should i use ( 200u, 2000u, 20m, 200m) if i use 20 on the voltage and i want to use the formula W=VxA ?
It seems to me that the measuring in itselfs alters the numbers. The brightness of the LED changes.
What is happening here ? How can i measure amperes ?
1/ LED hooked up to a battery. Multimeter placed in series to measure the current. (the LED seems to light up but this is reflection)
2/ I turn the multimeter to 200m, the LED lights up very brightly. On the display: 03,8
3/ Multimeter is turned to 20m, the LED lights up. On the display: 3,29
4/ Multimeter is turned to 2000u, the LED lights up. On the display: 1197
5/ Multimeter is turned to 200u, the LED lights up but not verry strong. On the display 1 .
9 mei 2012
I would like to make an electrical device working using the chemo-electro power of tomatoes. That is the lemon battery principal but than using tomatoes
I live in a rather cold climate and there are no lemons growing about. Tomato is the next best thing: it is verry sour and jucy. ( and can be transformed into tomatosauce later on.)
I'm doing all kind off experiments at the moment. I plan to put them on this blog.
That is the reasen why it is in English, and i know, my English is not exactically up to scratch. I do appologize.
This is my graduation project. I have a very strikt deadline: 16 june 2012. No time for protocol.