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Projecttitel: Arp1601 CloneStatus:
Startdate: end of 2014Duedate: Summer 2015last update:12Jun 2015August 2016 |
rev.3 update: (Summer 2016 jhulk's pcb run)
C42 = 1nF c0g Capacitor
C5 = 33nF or use 39nF Filmcap or ceramic cap
Muffwiggler Thread:
https://www.muffwiggler.com/forum/viewtopic.php?t=110640
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BOM: (
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BOM update 12 jun.2015)
please see attachment list above
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Known Issues: (rev1. and rev2)
The start/stop pushbutton is a little prone to contact bounce giving multiple triggers. The ever-helpful Nordcore has a fix involving changing one IC, two additional resistors and one capacitor and one track to cut with a little point to point wiring. Unfortunately it is too late to incorporate these changes into the round 2 PCBs so they will remain as PCB rev 2. A quick fix kippling have tried with good success is increasing C5 to 33nF, and adding a 1nF capacitor soldered directly across the SW1 terminals, and for me at least gives no noticeable lag.
Further tips will be added as I think of them or they are pointed out by users
Mods for Start/Stop: As mentioned above change C5 (10nF) to something around 33/39nF, and add a 1nF directly across the pins of SW1 to eliminate the contact bounce causing the unreliable start/stop push-button operation.
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