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Beginner looking for breadboard power
MHz000: As a newbie I'm not in the position to report an error - don't know where don't know how. Will you take the task helping other users looking not so stupid? In general this is a hopeless task....
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I've actually been following that guide, I'm just wanting to know how to light just one LED. I can't quite understand how to do that. I'm wanting to know so I can then have a go at assigning it to a...
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thanks. Yes, they are in series. I have them functioning with some coding. Currently using the Arduino Uno to test. I'd like to be able to get 4 of the LEDs to light wth only one wire instead of 4...
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Schematic to breadboard layout
Set only the bit in the register that corresponds to the LED you want to light (i.e. set a 1 in any single bit in the register) and then send the byte to the shift register. The LED corresponding to...
View ArticleBeginner looking for breadboard power
With Firefox 52 on Fedora, right click the link, and "Save Link As" worked for me. Instead of clicking then saving the page. The problem is what file types the browser thinks is should simply display,...
View ArticleSchematic to breadboard layout
for (int i = 0; i < 8; i++) { This is the part of the code that is controlling the LEDs ain't it?
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That should be possible with 2 resistors and a series parallel circuit. The issue is that the leds take about 1.8 V (for red) to light and you only have 5 V to drive them. 4 in series needs around 8 V...
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Wiring 4 LEDs in series, and driving from a single Arduino pin could be a problem. The 3.3 or 5 volts from the Arduino might not be enough, since each LED needs a minimal voltage drop across it before...
View ArticleSchematic to breadboard layout
Yes or more correctly the value of variable leds is what controls the leds. If you set leds = 1 and then called updateShiftRegister(); (without the for loop) then whatever bit(s) are set in variable...
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Resistor Placement
Note with 22 leds total at 10 ma (less than the 14 ma I allowed) you are getting close to a little bit over the max sink current of a 328 chip as used in the arduino (it is listed at 200 ma, 22 leds...
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For more on trade offs, if requirements mean additional external circuitry is needed to handle the current, then with a separate voltage source for the LEDs, and a driver that be switched by the...
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Resistor Placement
Wow, thanks for the replies. Give me a bit to digest all of this. The attached is hat I was working towards. First version. this only has 20 LEDs, but this s what I'm working towards. I reaalize this...
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That will work fine as is. There is no Ardunio in circuit, so none of the 5 volt, 40ma, 200ma limits apply. Assuming about 20ma draw for the LEDs, that is about 100ma total for the 9 volt battery, and...
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Been to this website numerous times. Obviously, not everything is sinking in. A lot of great info at the site.
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Beginner looking for breadboard power
microMerlinthank-you for the hint. It works fine for me too
View ArticleSchematic to breadboard layout
/*Adafruit Arduino - Lesson 4. 8 LEDs and a Shift Register*/ int latchPin = 5;int clockPin = 6;int dataPin = 4; byte leds = 1; void setup() { pinMode(latchPin, OUTPUT); pinMode(dataPin, OUTPUT);...
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Fritzing now crashes on my Pi (running Raspbian O/S)
Well , I thought I had been experimenting with other software so much that the O/S got corrupt. It finally would not open any of my software Qt Creator , Fritzing and others .Sooo I reinstalled O/S...
View ArticleProblem with PCB created with Fritzing
Hi all, I've used Seeed several times to order PCBs that I created in Fritzing. This time I either have a defect in production or hit a bug in Fritzing. I'm not sure which. I am asking here because,...
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