WTB: NSM3915 LED Bar Graph Module

Oberheimer · Nov 11, 2023

Looking for a National Semiconductor NSM3915 10-LED display module. Please contact me if you have any for sale or if you know of a source. Thanks!

Tony Stewart · Nov 11, 2023

NSM3915 Price & Stock | DigiPart

NSM3915 Price, NSM3915 Stock, Buy NSM3915 from electronic components distributors. Instant result for NSM3915

www.digipart.com

Oberheimer · Nov 11, 2023

Thanks I’ll check them out. Never had much luck with electronics component sourcing distributors.

ZipZapOuch · Nov 11, 2023

Would a 3914 work for you or do you need the log version?

Oberheimer · Nov 11, 2023

I wish but I need the log version. Thanks for the reply.

danadak · Nov 12, 2023

You could always use a LM3914 with a log amp (single Op Amp) converting
V to log before presented to LM3914.....

https://www.analog.com/media/en/training-seminars/tutorials/MT-077.pdf

https://www.analog.com/en/analog-dialogue/articles/logarithmic-amplifiers-explained.html

Regards, Dana.

ZipZapOuch · Nov 12, 2023

What's the problem with your current module (Assuming you're doing a repair instead of a new build)?

I don't recall one of the chips ever failing - only the LEDs. In that case, you may want to try just a bar graph replacement. These bargraphs are just a white frame snapped into place and then some SMD-like LEDs mounted to the board. I think some 0602 sized LEDs will fit under each gap in the plastic frame if you want to give it a try.

audioguru · Nov 12, 2023

I used two NSN3915 modules in a series circuit displaying an audio range of 60dB about 60 years ago.
Lately I was thinking about replacing their dim old LEDs with bright modern LEDs.

Oberheimer · Nov 16, 2023

Hi. If you replace your NSM3915 modules. I’ll gladly purchase both. Thank you

audioguru · Nov 16, 2023

Digikey says the LM3915 is obsolete and they have none in stock. The linear LM3914 is available in a surface-mount package.
Therefore I will keep my NSM3915s (I found a 3rd one) and my LM3915s.

ryro25 · Nov 22, 2023

I have one sitting on my desk, still in original RS Components packaging. Provided that 1 is enough, drop me a message and we can sort postage

Nigel Goodwin · Nov 22, 2023

ryro25 said:
I have one sitting on my desk, still in original RS Components packaging. Provided that 1 is enough, drop me a message and we can sort postage

Is the price in pounds, shillings and pence?

I wonder when RS stopped selling them?.

ryro25 · Nov 22, 2023

Nigel Goodwin said:
Is the price in pounds, shillings and pence?

I wonder when RS stopped selling them?.

Sadly no price on the label, I 'acquired' it from a long defunct electronics lab at work just the other day. The stock number is 304-605. RS Online doesn't seem to know about it, perhaps unsurprisingly.

Oberheimer · Nov 22, 2023

ryro25 said:
I have one sitting on my desk, still in original RS Components packaging. Provided that 1 is enough, drop me a message and we can sort postage

Oberheimer · Nov 22, 2023

Thanks!

Oberheimer · Nov 22, 2023

ryro25 pm sent. Thx

Pommie · Nov 23, 2023

Why is this a problem? I can buy these around the corner for less than UKP5. Are they very rare? Or, is UKP5 expensive?

Mike.

ZipZapOuch · Nov 23, 2023

Pommie said:
Why is this a problem? I can buy these around the corner for less than UKP5. Are they very rare? Or, is UKP5 expensive?

Mike.

Do you have the chip or the module? See photos of module with 10LEDs above.

Nigel Goodwin · Nov 23, 2023

Pommie said:
Why is this a problem? I can buy these around the corner for less than UKP5. Are they very rare? Or, is UKP5 expensive?

Mike.

The log ones LM3915 (which is what everyone wants) are long discontinued, although the Chinese seem to be selling pirated versions, but as usual with China do they actually work?.

ZipZapOuch · Nov 23, 2023

Nigel Goodwin said:
The log ones LM3915 (which is what everyone wants) are long discontinued, although the Chinese seem to be selling pirated versions, but as usual with China do they actually work?.

The chips are long discontinued, the modules NSM3915 are long, long long discontinued.

WTB: NSM3915 LED Bar Graph Module

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