Differences

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--- wilba_mb_6582 [2011/11/09 14:31] – Removed one more unit of spam miggyb
+++ wilba_mb_6582 [2018/09/18 17:32] – [Base PCB] added PSU option E jaytee
@@ Line 39: / Line 39: @@
 [[http://www.midibox.org/forum/index.php?board=36.0]]
-**I am running a bulk order for [[http://www.diamondlinks.net|link building]] control surface parts, Australians only, see here:**
+**I am running a bulk order for control surface parts, Australians only, see here:**
 [[http://www.midibox.org/dokuwiki/doku.php?id=wilba_mb_6582_parts_bulk_order]]
@@ Line 100: / Line 100: @@
     * **PSU Option C:** Uses 5v regulation circuit to provide option A or B when not using C64 PSU (which has its own 5V regulation). //I have added this option at the last minute to the PCB as a potential workaround for people unable to get a C64 PSU. People could generate 5v from a single unregulated 9v AC supply (9v AC adapter) or supply separate unregulated 9v AC and unregulated 5v DC supplies (9v and 5v AC adapters), using the same power socket and switch. Please do not assume this idea will work well, it might introduce noise, hum and heat!//
     * **PSU Option D:** External regulated power supply circuit, supplying +12v,+9v,+5v and ground ... for those people wanting to use their own power supply, because they don't want to use the C64 PSU.
+    * **[[wilba_mb_6582_psuopte|PSU Option E:]]** Uses a single 12-15V DC supply (aka a common wall-wart). This is a newer option worked out on the forums to avoid the common pitfalls associated with using a C64 power supply or other AC PSUs. Uses switching regulators (which were not available at a reasonable price or quality when the MB-6582 was designed) in order to generate a 5V rail (or a 5V and a 9V rail in the case of a mixed-SID setup) and a regular linear regulator to generate the 9v rail (or the 12V rail in the case of 6581/mixed-SID setups). Click the link for a complete tutorial.
 ===== Control Surface PCB =====
@@ Line 150: / Line 151: @@
 ===== Revision 1 PCBs (bought from Wilba) =====
-[[http://www.mb6582.org/plans/MB-6582_Base_PCB_Color.pdf]]
+<del>[[http://www.mb6582.org/plans/MB-6582_Base_PCB_Color.pdf]] dead link</del>
-[[http://www.mb6582.org/plans/MB-6582_Base_PCB_Mono.pdf]]
+[[http://www.midibox.org/dokuwiki/lib/exe/fetch.php?media=mb-6582:mb-6582_base_pcb.pdf]]
-[[http://www.mb6582.org/plans/MB-6582_CS_PCB_Color.pdf]]
+<del>[[http://www.mb6582.org/plans/MB-6582_Base_PCB_Mono.pdf]] dead link</del>
-[[http://www.mb6582.org/plans/MB-6582_CS_PCB_Mono.pdf]]
+<del>[[http://www.mb6582.org/plans/MB-6582_CS_PCB_Color.pdf]] dead link</del>
+<del>[[http://www.mb6582.org/plans/MB-6582_CS_PCB_Mono.pdf]] dead link</del>
 ===== Revision 2 PCBs (bought from SmashTV) =====
-[[http://www.mb6582.org/plans/MB-6582_Base_PCB_R2_Color.pdf]]
+<del>[[http://www.mb6582.org/plans/MB-6582_Base_PCB_R2_Color.pdf]] dead link</del>
-[[http://www.mb6582.org/plans/MB-6582_Base_PCB_R2_Mono.pdf]]
+[[http://www.midibox.org/dokuwiki/lib/exe/fetch.php?media=mb-6582:mb-6582_base_pcb_r2_color.pdf]]
-[[http://www.mb6582.org/plans/MB-6582_CS_PCB_R2_Color.pdf]]
+<del>[[http://www.mb6582.org/plans/MB-6582_Base_PCB_R2_Mono.pdf]] dead link</del>
-[[http://www.mb6582.org/plans/MB-6582_CS_PCB_R2_Mono.pdf]]
+<del>[[http://www.mb6582.org/plans/MB-6582_CS_PCB_R2_Color.pdf]] dead link</del>
+[[http://www.midibox.org/dokuwiki/lib/exe/fetch.php?media=mb-6582:mb-6582_cs_pcb_r2_color.pdf]]
+<del>[[http://www.mb6582.org/plans/MB-6582_CS_PCB_R2_Mono.pdf]] dead link</del>
@@ Line 243: / Line 249: @@
 This is a passive mixed output of the four stereo channels, which you can connect to the small phono jack above the power switch. Totally optional.
-This was a late design idea I threw into the prototype, the resistors below each audio socket are used to connect the audio signals together when there is no plug in the switched audio socket, i.e. it will only mix those sockets without plugs. You need to connect it together with insulated wire under the board though.... I didn't want to mess up the ground plane with tracks. To the right of the resistors R70-R77 (below the stereo sockets) are pads, these pads should be connected in two sets of wires, one set connects the pads that are next to R70, R72, R74, R76, the other set connects the pads that are next to R71, R73, R75, R77.
+This was a late design idea I threw into the prototype, the resistors below each audio socket are used to connect the audio signals together when there is no plug in the switched audio socket, i.e. it will only mix those sockets without plugs. You need to connect it together with insulated wire under the board though.... I didn't want to mess up the ground plane with tracks. To the right of the resistors R70-R77 (below the stereo sockets) are pads, these pads should be connected in two sets of wires, one set connects the pads that are next to R70, R72, R74, R76, the other set connects the pads that are next to R71, R73, R75, R77. (NOTE: R2 boards do not require the wires, there are tracks on the top layer.)
 I used 10K resistors there because that's what I've seen before in passive mixer designs, but the output is very attenuated, and I am guessing that you could drop these to 1K or less, as the outputs of the audio buffers after each SID can probably handle that. Someone with more audio electronics (and SID!) knowledge can probably answer that question.