http://www.centralrichmondsf.com/blocking-diode/
Blocking Diode
Someone once used cars amplifiers surround sound systems?
I normal use because too hot when you need more volume, they make great sub woofer amplifiers in the house and run cool with the left and right speakers are much stronger. All that is needed is a large 12v transformer block with a diode bridge with a capacitor 25Amp
Not recommended stop car audio car audio
Blocking Diode
Do It Yourself Solar Power System
The benefits of PV solar panels are real. According to a study by the California Solar Institute, $1 in cost savings annually, contributes to $20 in increased home value. This means with the cost savings of 1500 dollars, your property value will increase by $30,000. Government and state tax credits being passed at the moment also contribute to the reduction in initial costs in solar panel systems.
One of the ways that you can get into the clean energy mix is by building your own solar power system. In order to build a do it yourself solar power system, you will need: Plywood, masonite pegboard, plexiglass, monocrystalline solar cells, tabbing wire, flux pen, blocking diode, electrical jack, and a solder.
Once you have the proper material, we can then start building the solar array.
First, start out by laying the solar panels in rows of six, so you get a clear idea of the size of the solar array once it comes time to build the box.
Secondly, solder the solar cells to each other while connecting the tabbing wire at the solder points on the solar cells. Be careful with the cells as they are extremely brittle. You may want to consider purchasing extra cells in case any of them break.
Leave enough tabbing wire on the end so that you can connect it to the blocking diode and electrical jack.
Test the solar array that you have so far, to make sure that you have the right output. For a 36 solar cell setup, you should get around 18V.
Next, dab the backs of the solar cells with the flux pen. The flux pen contains a heat resistant adhesive you will attach to the pegboard.
Lay the pegboard over all the solar cells. Give it about a minute and then flip the setup so that the solar cells are facing up.
Cut off the excess masonite pegboard.
The next step will be to build the box. The solar panel enclosure keep the solar cells from exposure to extreme weather.
The environmental benefits are also astounding. Over the lifetime of owning a solar power system, you reduce the carbon footprint in using renewable energy equivalent to planting 1,450 trees. Solar panels are an incredibly clean source of energy which does not release carbon into the atmosphere. This means a clean future for everyone and future generations.
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question oscillateur Colpitts?
Colpitts oscillateur J'ai construit ce qui suit: http://en.wikipedia.org/wiki/File:NPN_Colpitts_oscillator_collector_coil.png 100UH utilisant L et casquettes 22pF et a obtenu un signal sur freq MHz 2V amplitude 2, Vcc = 9V. Et j'ai utilisé un bouchon 0.47uF de bloquer le composant de sortie DC. Puis appliquer le résultat à une diode 1N4007 pour la demi-onde signal redressé, mais lorsque vous vous connectez les bornes de l'oscilloscope à la sortie je n'ai pas de signal à tous. seul le signal de sortie 0. pourquoi la diode ne faisait pas partie de 2V amplitude? Notes: * J'ai pris la sortie de l'émetteur du transistor oscillateur pour observer un signal le CA, lorsque j'ai mesuré la sortie du collecteur a donné seulement un signal continu *. J'ai essayé d'utiliser les différentes valeurs de la résistance que le coût entre la sortie de la diode et GND que 1K, 10K, 32K et des valeurs qui ne fonctionne toujours pas.
En plus de ce que suggère billrussell42, je pense que vous avez choisi plus petits condensateurs un inducteur grand pour son oscillateur. Pour cette raison l'impédance de sortie de l'oscillateur est assez élevé. Je présume que votre impédance d'entrée oscilloscope affecte le circuit très forte, surtout lorsqu'il est connecté au collecteur du transistor. La plupart des sondes portée ont une impédance de 10 ohms 1 ou M résistance en parallèle avec la capacité pFof 10 à 50. La capacité de la sonde est probablement aussi important que les condensateurs 22 pF sélectionné, donc je pense que c'est affectant le circuit oscillateur et s'arrête peut-être, même oscillations. Pouvez-vous choisir une plus petite inductance, par exemple environ 4,7 uH et en utilisant environ 470 pF? Cela permettrait de réduire l'impédance d'un facteur d'environ de 20 de sorte que la sonde a atteint l'oscillateur se charge pas beaucoup. Bonne chance avec vos expériences. Amusez-vous!
How to build a solar panel part 10
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