mitsos
Well-known member
- Joined
- May 4, 2007
- Messages
- 2,886
OK, I know there are a few other threads on here based on the LM391x, 10 LED chip... Anyway, I'm trying to put together an LED VU for a mic pre project, and since my primary concern ATM is space, I'm leaning toward putting 5 LEDs and a small circuit. I've been searching for an appropriate IC to do the metering and since I am not familiar with LEDs and their respective ICs, I need help.
I want to do something with 5 LEDs. I've never done much with LEDs but I found a couple of chips, just wondering if there is a favorite like the LM chips are for 10-LED VUs? The two chips I looked at in my recent web searching are the NTE1561 and Sanyo LB1443N(is this discontinued?). They are SIP 9, and have the same pinout. Anyone have experience with either of these (or another chip maybe)? Also, the datasheets list the dB values for when each LED lights up (at least that's how I understood it) but they seem to go from -12 to +6... Is there a reason they seem to have the 5th LED at +6dB instead of +3dB? I think this may be adjustable, can't quite see it from the datasheets (sanyo one is more in depth), but maybe someone can shed some light?
datasheets:
http://www.nteinc.com/specs/1500to1599/pdf/nte1561.pdf
http://www.semiconductor-sanyo.com/ds_e/ENN1410B.pdf
Hope this is clear.. and hopefully this will prove useful to others as well. Thanks!
I want to do something with 5 LEDs. I've never done much with LEDs but I found a couple of chips, just wondering if there is a favorite like the LM chips are for 10-LED VUs? The two chips I looked at in my recent web searching are the NTE1561 and Sanyo LB1443N(is this discontinued?). They are SIP 9, and have the same pinout. Anyone have experience with either of these (or another chip maybe)? Also, the datasheets list the dB values for when each LED lights up (at least that's how I understood it) but they seem to go from -12 to +6... Is there a reason they seem to have the 5th LED at +6dB instead of +3dB? I think this may be adjustable, can't quite see it from the datasheets (sanyo one is more in depth), but maybe someone can shed some light?
datasheets:
http://www.nteinc.com/specs/1500to1599/pdf/nte1561.pdf
http://www.semiconductor-sanyo.com/ds_e/ENN1410B.pdf
Hope this is clear.. and hopefully this will prove useful to others as well. Thanks!