oberg

If it is possible - I'd like to sign up for a full kit including the PICs. Thanks!

Thanks for your suggestions, I'll take a look at them when I've gathered enough entusiasm. It's more fun building things that work... ;) ...but perhaps I shouldn't be complaining, I burned my PICs with a working JDM-module on my first try, which seems to be a success worth remebering seeing the other posts here. Regarding the brightness/constrast thing - I really don't know. Perhaps I've messed things up. All I know is that on the CORE module the pins are labeled: VS, VD, V0, RS, RW, E, D0-D7 ...and on my LCD (according to the datasheet): VSS, VDD, VBT, RS, R/W, E, D0-D7 I've just assumed that the LCD's VBT (brightness adjustment) corresponds to V0 on the CORE since Luminance is supposed to go to the backlight LEDs. I'll recheck for shorts and see if I can have misplaced my transistor (did so on the PSU circuit).

Thanks for your suggestions, I'll take a look at them when I've gathered enough entusiasm. It's more fun building things that work... ;) ...but perhaps I shouldn't be complaining, I burned my PICs with a working JDM-module on my first try, which seems to be a success worth remebering seeing the other posts here. Regarding the brightness/constrast thing - I really don't know. Perhaps I've messed things up. All I know is that on the CORE module the pins are labeled: VS, VD, V0, RS, RW, E, D0-D7 ...and on my LCD (according to the datasheet): VSS, VDD, VBT, RS, R/W, E, D0-D7 I've just assumed that the LCD's VBT (brightness adjustment) corresponds to V0 on the CORE since Luminance is supposed to go to the backlight LEDs. I'll recheck for shorts and see if I can have misplaced my transistor (did so on the PSU circuit).

Got a new LCD today. Soldered it in place - got a flash of the famous black boxes flickering - and then nothing. It just wont come alive again. I think I'll build a new Core module to see if I have more luck with a new one. B-B-Boring... Â :P

Got a new LCD today. Soldered it in place - got a flash of the famous black boxes flickering - and then nothing. It just wont come alive again. I think I'll build a new Core module to see if I have more luck with a new one. B-B-Boring... Â :P

Thanks for your suggestions! On my LCD they don't call i contrast but rather "brightness" (pin 3 "VBT" on my LCD, V0 on Thorstens drawings). I've tried adjusting the 10k-contrast pot without any signs of life from the screen. The batterytest also failed (+ to ground - to pin three, and vice versa). My plan now is to buy another (cheap) ordinary LCD (no OLED) to see if my problems are within the Core or the screen. Any other suggestions?

Thanks for your suggestions! On my LCD they don't call i contrast but rather "brightness" (pin 3 "VBT" on my LCD, V0 on Thorstens drawings). I've tried adjusting the 10k-contrast pot without any signs of life from the screen. The batterytest also failed (+ to ground - to pin three, and vice versa). My plan now is to buy another (cheap) ordinary LCD (no OLED) to see if my problems are within the Core or the screen. Any other suggestions?

I've done some measuring and VSS is grounded, the VDD and VBT seem to get the voltages they should. The rest of the pins show low voltages which seem ok. (All according to the LCD-datasheet). All the pins and wirdes are connected accordingly to the wiring shown in mbhp_lcd.pdf. Strange... ??? Since I get the bootstrap upload request over MIDI I guess that my PIC is alright. But is there some other critical component of the Core-module that could be wasted that would make the LCD go out? (I'm thinking oscillator? Or can I assume that the oscillator is ok since I get the upload request?)

I've done some measuring and VSS is grounded, the VDD and VBT seem to get the voltages they should. The rest of the pins show low voltages which seem ok. (All according to the LCD-datasheet). All the pins and wirdes are connected accordingly to the wiring shown in mbhp_lcd.pdf. Strange... ??? Since I get the bootstrap upload request over MIDI I guess that my PIC is alright. But is there some other critical component of the Core-module that could be wasted that would make the LCD go out? (I'm thinking oscillator? Or can I assume that the oscillator is ok since I get the upload request?)

I'm trying to build the MB-SID - this far I've finished my first (out of 4) Core/SID pair and the optimized recycled-C64 PSU-circuit. My PICs are burnt (bootstrap 1.1b) with the JDM module without much trouble (the voltages on the JDM didn't reach the levels stated on the ucapps.de webpage - but it seemed to work up just fine anyway). So far so good... When I hook up my Core-board to MidiOX I get the bootstrap upload request but I don't seem to be able to upload MIOS. I haven't done the LED-troubleshooting TK describes yet since I was planning to get the LCD working first to see what I'm doing. BUT - right now the LCD gives me nothing. No blocks, no nothing. The wiring should be good, since I've used my multimeter to check connections from the solderingpoints at the LCD to the corresponding legs on the PIC. I'm worried that I might somehow have burned my LCD - but before I go out and buy another one. Do you have any suggestions on further troubleshooting? Thanks. The LCD is a 2x20 OLED "PDC2002M". specs: http://www.delta-opto.com.tw/PRODUCTS/PDC2002M_spec.pdf

I'm trying to build the MB-SID - this far I've finished my first (out of 4) Core/SID pair and the optimized recycled-C64 PSU-circuit. My PICs are burnt (bootstrap 1.1b) with the JDM module without much trouble (the voltages on the JDM didn't reach the levels stated on the ucapps.de webpage - but it seemed to work up just fine anyway). So far so good... When I hook up my Core-board to MidiOX I get the bootstrap upload request but I don't seem to be able to upload MIOS. I haven't done the LED-troubleshooting TK describes yet since I was planning to get the LCD working first to see what I'm doing. BUT - right now the LCD gives me nothing. No blocks, no nothing. The wiring should be good, since I've used my multimeter to check connections from the solderingpoints at the LCD to the corresponding legs on the PIC. I'm worried that I might somehow have burned my LCD - but before I go out and buy another one. Do you have any suggestions on further troubleshooting? Thanks. The LCD is a 2x20 OLED "PDC2002M". specs: http://www.delta-opto.com.tw/PRODUCTS/PDC2002M_spec.pdf

It was the 78L09 placed backwards. I must have misunderstood the datasheet I looked at... :-[

It was the 78L09 placed backwards. I must have misunderstood the datasheet I looked at... :-[

I've gone through the veroboard again, and when measuring with a 10k load the voltages read 17,7. The ground pin of the 78L09 seems connected alright and measuring on the regulator pins gives me - leg 1 to leg 2 13,4 V - leg 3 to leg 2 12,8 V When measuring from + on the bridge-rectifier to ground I get the same 18 volts - but when measuring from + to - (both on the rectifier) I get 13,4 V. Does that seem ok? [pay_c]: Ok, so I'll just stick with my 18v and let the regulators on the SID-module do the work? Thanks for all your help!

I've gone through the veroboard again, and when measuring with a 10k load the voltages read 17,7. The ground pin of the 78L09 seems connected alright and measuring on the regulator pins gives me - leg 1 to leg 2 13,4 V - leg 3 to leg 2 12,8 V When measuring from + on the bridge-rectifier to ground I get the same 18 volts - but when measuring from + to - (both on the rectifier) I get 13,4 V. Does that seem ok? [pay_c]: Ok, so I'll just stick with my 18v and let the regulators on the SID-module do the work? Thanks for all your help!