This $2 LED bargraph kit is intended for audio applications. But it's got issues 🙂
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Help support Julian's electronic kit build videos: https://www.patreon.com/julian256
I can’t get dot mode, 9v to pin 9 is blinding bright bar mode, GND to pin 9 is bar mode with both end leds always on, unconnected is best it’s not as bright bar mode
nice video… two circuits of two lm3914 (4) chips should make a sweet on pcb pos/neg 10vdc linear signal input/output setup meters… with dots or bars for power saving? Thanks…:)
Hello. Good Morning . a information. the R6 is 560ohms. mine didn't come. I should put which one.
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hi J I…
try put round LED light on the kit…
dont need rectangle LED…
can do that or not
I had built some stuff using these chips years ago, and was contemplating building some more, and when I saw the astoundingly low price on that ebay listing, I went there. Prices were a lot higher! Then I added the word "kit" to my search, and got some that were much more reasonable, though still a little higher than what I saw in the video. There are also versions of this which have a 741 op amp on the board, presumably to provide that rectifier function. I know that when I came up with my original circuit for this, years ago, I had to use an op amp and some filtering to get the "dot mode" display to work like I thought it should…
Dear Sir,
I used to watch the video you put on the net! You are a great expert and I am an old retired! I bought two cheap kits and put them together! Go, yes it goes but it doesn't respond to the two channels as it should! The vibrations of the LEDs make it impossible to look at the delays between the channels! It's like a mono! I saw an assembled version in Italian, replaced with the two capacitor electrolyte. But neither drawing nor understanding! An old reader's suggestion to put two 2.2 micro F electrolyte condensers after 5pin, think one channel and solve the vibration and speed!
I'm not drawing because they didn't give me an old man just begging! I'd like to thank you for having a line! All the best!
Think I screwed it up. When I connect 2032 battery to the board it simply lights up D8 and D9. Screwing the little screw changes nothing. Ideas?
yes excelent i am having the same problem with lm3915 with the dot mode. i thought i did some thing to it now i no what to do. thanks …………….
Can you tell me what is your resistor tester that you are using in this video?
Where did you get your component tester please..??
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is this kit come with sound pulse meter
may I ask why you have an oval cut out on the front panel of your vocoder project ? for the Led PPM
Yayyyy kit build!
can you please give me the link where i can get this kit too