wilba_mb_6582
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wilba_mb_6582 [2011/11/21 11:31] – richardeortiz | wilba_mb_6582 [2018/09/18 17:32] – [Base PCB] added PSU option E jaytee | ||
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* **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 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, | * **PSU Option D:** External regulated power supply circuit, supplying +12v, | ||
+ | * **[[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/ | ||
===== Control Surface PCB ===== | ===== Control Surface PCB ===== | ||
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===== Revision 1 PCBs (bought from Wilba) ===== | ===== Revision 1 PCBs (bought from Wilba) ===== | ||
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===== Revision 2 PCBs (bought from SmashTV) ===== | ===== Revision 2 PCBs (bought from SmashTV) ===== | ||
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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. | 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. | ||
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** I am troubleshooting my LED's and need that cool utility that makes everything light up ** | ** I am troubleshooting my LED's and need that cool utility that makes everything light up ** |
wilba_mb_6582.txt · Last modified: 2020/12/06 22:07 by m00dawg