Quantity: 2
From Tellun Corporation.
Modifications: I chose the bright LEDs. See the chart below for details. The pattern is a reverse-S shape of my own design. I use green LEDs for positive and red for negative in my synth. The peak LEDs are the opposite color in the center at top and bottom.
| LED | Count | Color | Lumex Part Number | Resistor | Value |
|---|---|---|---|---|---|
| + Peak | 1 | super orange | SSL-LX3044SOC | R18 | 7.5K |
| Positive | 10 | green | SSL-LX3044GC | R27 | 4.7K |
| Zero | 1 | blue | SSL-LX3044USBC | R12 | 10K |
| Negative | 10 | super red | SSL-LX3044SRC/D | R30 | omitted |
| – Peak | 1 | super green | SSL-LX3044UEGC | R24 | 6.8K |
Here are some construction photos of Veeblefetzer #2. I soldered a red and white wire to each LED rather than running a buss to the power (red wires). Each LED is wired separately in case it needs to be repaired. I also think it’s easier than running wires between LEDs on the board. I would have used smaller gauge wire (this is #22) if I had had it. All the wires bunched up makes it hard to adjust the trimpots. The LED driver ICs are in sockets under all that wire. I installed the header and jumper to select Internal or External +5V LED power, but I did not install the regulator for internal power yet, because I intend to run it off external power. If I need to run it in a cabinet without a separate +5 supply, I will install the regulator at that time and just move the jumper.
