The parallel tag has no wiki summary.
7
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6answers
1k views
6 LEDs in parallel with a single resistor to simplify soldering
I'm trying to wire up 6 RGB LEDs in parallel, all controlled from a single source (well, three sources, one for each colour). The LEDs came supplied with resistors to limit the current of 270 Ohm for ...
13
votes
4answers
7k views
Why exactly can't a single resistor be used for many parallel LEDs?
Why can't you use a single resistor for a number of LEDs in parallel instead of one each?
4
votes
2answers
475 views
Single resistor powering multiple LEDs in parallel where current through resistor is lower than max allowed current for an individual LED
While writing an answer about using multiple diodes connected to a single resistor, I stumbled upon a case about which I haven't read a lot: What happens when we set the resistor so that it sets the ...
9
votes
4answers
765 views
Will a 0402 0.01uF cer cap next to a 0402 0.1uF cer cap have any power decoupling benefits?
I always understood that the point of using smaller caps in parallel was to provide low impedance at higher frequencies than the bigger caps, BECAUSE the higher capacitance caps 'usually' had larger ...
8
votes
8answers
20k views
What happens if I connect two different DC voltage sources in parallel?
I have a computer power supply that I'm hacking together as a bench supply. For this particular model to power on, I need a minimum load across both +5V and +12V.
"Easy," I thought, "I'll just ...
3
votes
4answers
672 views
How should I connect batteries in parallel?
I have a pair of these Li-ion batteries. I'd like to couple them so that I get double the current. However, I realize that this could be a Bad Idea™, as the charge could flow in a loop through both ...
12
votes
6answers
5k views
Is paralleling diodes a bad idea?
I'm trying to repair an 800W power supply (see my previous question on this.) One thing that gets me is that the design has two schottky diode packages (in TO-220) in parallel. I was always told this ...
4
votes
2answers
121 views
How to deal with multiple pull-up resistors on modules
I was thinking about doing a modules for a development board I did a few days ago that will include spi/i2c interfaces.
The problem is that I didn't included pull-up resistors in the MCU pins in the ...
4
votes
1answer
363 views
Parallel charger circuits
I'm constructing a power supply based on solar cells backed by batteries. The solar cells deliver between 0 and 4 A, depending on the time of day, while the charger I plan on using, the LT3652, has a ...
2
votes
3answers
545 views
Writing to a Parallel to USB convertor [closed]
I hope this is the right forum, I've only ever used StackOverflow and am new to Electricals.
I have written an Access Control program in Delphi which sends an 8bit value to one of the three parallel ...
1
vote
4answers
507 views
Can you split power between two voltage regulators?
In order to supply more power to a circuit. can you split the power between 2 voltage regulators, in parallel?
Can this overpower one of the Voltage Regulators?
1
vote
2answers
2k views
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 ...
