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Results tagged with batteries
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user 8300
An electric battery is a device consisting of one or more electrochemical cells that convert stored chemical energy into electrical energy. Connected a battery's negative to another's positive is a way to increase voltage, useful when a battery outputs low voltage.
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488 nm 30 mW 3.7 V laser: Is the driver or the diode fried at 9 V?
For a hobby project I'm doing, I accidentally gave my 488 nm 30 mW 3.7 V laser 9 V from a battery.
It appears to have died immediately.
Picture of similar laser (with housing) added for clarity. The l …
- 235
0
votes
2
answers
5k
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How to slow down an 12V electromotor/fan
2) If the answer above is yes, would a slower fan draw less power from the batteries? …
- 235
2
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3
answers
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What's the relationship between volts and amperes in batteries?
Thus it seems I'm stuck with AA batteries for my setup.
Anyway, my questions are:
Why is this happening?
Are there not enough amperes to drive the lasers? … Is there any way I can calculate the approximate number of lasers the batteries can drive?
Will an amplifier or extra driver be able to fix this so I can still use the 9V battery? …
- 235
0
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3
answers
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Connecting 5 12V LEDs in a parallel circuit
I recently bought 5 12V ultra bright LEDs (all identical), and want to hook them up to a battery pack of 8 AA batteries. …
- 235
1
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2
answers
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Connecting LEDs to a 9V battery
1) I have 6 4.5V 20mA LEDs and have connected them to a common 9V battery. Doing this I made 3 parallel circuits with 2 LEDs in each.
Now, I see that most pages that describe LED circuitry say that …
- 235