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Show posts MenuQuote from: Leevibe on December 24, 2014, 10:54:05 PM
Here is my latest labor of love. This was going to be my fall contest entry, but there were holdups in the process, so it...
- firing up the circuit through my test rig for the first time. It didn't work!! I was terrified that I'd fried the metal can opamp. It takes so much heat to solder to turrets. I used a heat sink clamp, but still. It turned out (after MUCH studying the schematic and my layout) that there were two missing ground connections on the PCB, hence the jumpers on the bottom.
Quote from: Leevibe on December 24, 2014, 10:54:05 PM
- making such a massive block of resin and wondering if I would get the amount right so it wouldn't overflow when I put the circuit into it. Also, wondering if I would get crazy amounts of air bubbles with no way to release them.
Quote from: LaceSensor on December 07, 2014, 05:01:55 PM
no love for me
all that effort to produce a board mounted everything PCB, and someone wires everything. You crazy sausage.
Quote from: alanp on December 07, 2014, 05:56:57 AM
Hell yeah
It's kinda nice to see someone do such a wildly different layout. You can do exactly this with the hoooge etched version as well, only issue is board space.
Any ticking issues with all those wires? What's your overall impression?
Quote from: midwayfair on May 27, 2013, 02:14:42 PM
REMOVE, don't REDUCE the 27k. You made the pot smaller -- less resistance = faster.
But there's a limit also set by R9 -- increase that as well. I'd try 15k there and 4.7k for r7.
If that's still too fast, it's time to look into increasing C5-C7 to 2.2uF.
If you want to get fancy, you can also use a dual gang 50k pot for the maximum possible speed range. Use a 4.7k for R7, remove R8, and replace R9 with a 4.7K + the other side of the dual gang.