Tellun Corporation TLN-904 Veeblefetzer

Veeblefetzer panelQuantity: 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.

Veeblefetzer wires

Veeblefetzer back

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