Electronics > Projects, Designs, and Technical Stuff
Soviet era, gorgeous IN-34-1 bargraph display.
LaserSteve:
I just ordered one of the big Russian tubes. I do sound for my place of worship and the idea of having one of those instead of the short bar on the mixer LCD is intriguing. Especially for vocals. The Mitani timing diagram brought the "how" into short focus. I've used lab lasers that have the Borroughs analog bars in their remote control heads, I'll see if I have a schematic.
Good Luck,
Steve
schmitt trigger:
Steve;
as a matter of fact, the website where I found the Mitani datasheet was one dedicated to professional audio.
Posters there commented that with 100 or even 200 elements, these tubes would make exceptional VU meters.
Which tube number did you order?
Datman:
Keep in mind that it is linear, i think. For a VUmeter you need, instead, a custom logarithmic scale, using complex electronics.
You can do the same without complex electronics (and typical log amps thermal instability) using Arduino, a 16-bit converter and a LCD or OLED graphic display :)
https://www.google.com/search?q=arduino+graphic+vu+meter
https://www.google.com/search?q=arduino+graphic+display+bargraph+vu+meter
xavier60:
This application note has designs for filtered rectifiers that replicate the proper meter ballistics for VU or PPM.
I used a PIC micro to do the log conversion using a lookup table and also multiplex LED bar graph displays.
https://datasheet.octopart.com/LM3916N-1/NOPB-National-Semiconductor-datasheet-7551873.pdf
001:
Hi
You can also use analog fluorescent bargraph like EMM81
It is only sort of magic eye tube
It drivered directly from grid. No additional elements requiered
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version