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opl3_module_modified [2014/01/28 11:04] eptheca |
opl3_module_modified [2014/01/28 11:40] (current) eptheca |
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====== MBHP_OPL3 module modifications, the 5V option ====== | ====== MBHP_OPL3 module modifications, the 5V option ====== | ||
- | The [[http://www.ucapps.de/mbhp_opl3.html|OPL3]] module originally has three TL074 op-amps, and a circuit that needs +/-12V bipolar power supply. | + | The [[http://www.ucapps.de/mbhp_opl3.html|MBHP_OPL3]] module originally has three TL074 op-amps, and a circuit that needs +/-12V bipolar power supply. |
- | In Wilba and nILS sammichFM, they use two OPA4348 rail-to-rail op-amps, that can be powered by 5V. | + | In Wilba and nILS [[sammichfm|sammichFM]], they use two OPA4348 rail-to-rail op-amps, that can be powered by 5V. |
Sauraen suggested another 5V rail-to rail op-amp, the MCP6004, which is pin compatible with the TL074, and a way to modify the OPL3 module to use these.[[http://midibox.org/forums/topic/18492-mbfm-5v-option/]] | Sauraen suggested another 5V rail-to rail op-amp, the MCP6004, which is pin compatible with the TL074, and a way to modify the OPL3 module to use these.[[http://midibox.org/forums/topic/18492-mbfm-5v-option/]] | ||
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- Bridge C20 pads (to supply Ground for the op-amps)\\ | - Bridge C20 pads (to supply Ground for the op-amps)\\ | ||
- Leave out bridges to IC6\\ | - Leave out bridges to IC6\\ | ||
- | - Use MCP6004 for IC3 and IC5\\ | + | - Use MCP6004 for IC3 and IC5 (IC3 The op-amp, not the DAC, labeling error)\\ |
- Supply 5V to the +12V pin, and Ground to Ground\\ | - Supply 5V to the +12V pin, and Ground to Ground\\ | ||