brokenchip

So pleased with the sound!!! Giles, I'm interested in the OLED display. Would you be able to post a link to the type you're looking at using? Any images of it up and running?

Wilba sent me a new LCD display and a 337 transistor. I've put them in and everything works well :D

Thanks Giles. Page is now bookmarked!

^ that could be part of the problem. Maybe the brightness pot should be set at the 8 or 9 o'clock position and then adjustments can be made up to and not beyond the 12 o'clock point. When I powered up the LCD mine was set on 12. Anyway, Wilba has kindly posted off a new LCD and I try a few things first with JBL at 5V. In Wilba's words "I would probably suggest leaving JBL at 5V until you know everything is working and switch to 12V if you're confident you have a stable and low enough voltage at the 12V rail (i.e. it's less than 12V not more). Or just leave it at 5V and keep the brightness down to less than half way." Apart from this my sammichSID is working properly and sounds absolutely amazing!!! Thanks guys for the help :D

Thankyou :D

Hi, I've been trying to find the lastest MIDIbox SID Synth firmware. The link in the build guide can't find the page (link must be broken). I guess I'm looking for the midibox_sid_v2_0_rc37.zip file. Could someone please paste in a link? thanks.

Thanks Wilba. So in future you may recommend going through the 5V regulator with a shunt placed on JR4 to get the additional current (to get the 100mA)? Otherwise I should just have the shunt set to 12V and no shunt placed JR4.

My screen is meant to be the inverse green text on black background display. I've not had it working properly so I can't totally be sure. Looks like I need a new screen due to excessive current destroying the backlight . I've sent Wilba an email to this thread so hopefully he'll shed some light. Are there proper circuit schematics for both boards?

Thanks nILS. I'll replace the screen. What should the jumper settings have been with the the supplied green screen? It's got me confused. Also, where can I pick up an identical LCD screen?

Anyone else got any suggestions?

Giles, your screen came with the kit? This has now really stumped me as to whats going on. And Hugo, as I can make any sense of what's up I'll get back to you - but it may not be the same issue.

Hey guys, I've been building my sammich kit over the last few days and it's been smooth sailing up to the part where the LCD screen failed. At first it was dim and the contrast was horrible (I could just make out the word "Ready"). I tripple checked the Jumper settings and joined boards once again. After turning the power back on I saw the backlight get very bright and then a small pop and the light went out. This was accompanied with the smell of something getting burnt out. Not to sure where the source of smoke came from but I could smell it stronger around T1, P1 and the resistors behind it. I turn it off, unplugged it and went looking for any possible signs of damage but couldn't see any. PSU that I'm using is the regulated 12V DC Powertech, switchmode from Jaycar. Cat No: MP3242. LCD screen was the one supplied by Wilba. One thing that has puzzled me is the LCD has written on it 5V. I'm going to be using 6581's and the Jumper configs are as follows: Jumper on 12v for backlight with jumper on JR4, SID jumper on for 6581 and both jumpers on JBP. I made all voltage checks and all were correct, but I was getting a 12.1V reading on the 12V points which I didn't think was enough to cause an issue. Also the Trimpot P1 was set at the 12 o'clock position when the LCD screen went out. Would appreciate any suggestions. EDIT: From my understanding the supplied LCD is a 5V and I positioned the jumpers to supply 12V. So I've given it 7V too much and cooked it. Cheers, Marty.

I pre-ordered a while ago but I've not heard from Wilba, does this mean I missed out on getting one? I really want to build this kit.