Two LED bar graphs. You would think they would be much alike, but no.
On the left: LTA-1000Y (2017 Thailand.) On the right: FJB10Y.
The polarity is reversed. The LTA has anode on the side of the first pin. The FBJ has the cathode on the side of the first pin.
The obvious difference: face colour grey vs face colour black.
Light colour is similar, but brightness is much different. I need to use 470 ohm resistor with the LTA, and a 2K ohm resister with the FJB.
I did some extra research on another convention, for multi-coloured bars. Is RED on top or on the bottom of the bar?:
- AVAGO HDSP-4832 has R/R/R/Y/Y/Y/Y/G/G/G with pin 1 as RED anode.
- KingBright DC7G3HWA has G/G/G/G/G/G/G/R/R/R with pin 1 as GRN anode.
- Fairchild MV5A164 (obsolete) has R/R/R/Y/Y/Y/Y/G/G/G with pin 1 as RED anode.
- Fairchild MV5C164 (obsolete) has G/G/G/G/G/G/Y/Y/Y/R with pin 1 as GRN anode.
- KYX B10BBGYR has B/G/G/G/G/Y/Y/Y/R/R with pin 1 as BLU anode.
- MT1025CTF has G/G/G/G/G/Y/Y/Y/R/R with pin 1 as GRN anode. Pin 1 (unmarked) at side that has print.
- SunLED XGMDKVGX10D has 10+10 bi-colour LEDs to interpolate between GRN to YLW to RED. To use them, 2k Ohm on R and 470 Ohm on G works well. Unfortunately, it is a common-cathode setup, which makes it useless for standard LED drivers.
- F2510GHR has G/G/G/G/Y/Y/Y/Y/R/R with pin 1 as GRN cathode. It is easy to connect incorrectly. UNLIKE ALL OTHERS, THIS ONE HAS PRODUCT NUMBER PRINTED AT CATHODE SIDE (BUT STILL AT PIN1 SIDE.) Gorgeous colours though, with the yellow being more like amber, A nice looking green that is not very bright, though.
- F2510HYG has R/R/R/R/Y/Y/Y/G/G/G with pin 1 as RED anode.
Some 8 segment led bars:
- F2010RG is R/R/G/G/G/G/G/G with pin1 as red anode.
- KYX-B08GOR is G/G/G/G/G/G/R/R with pin1 as grn anode.