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Well...
About 6 hrs of fiddling around ( from devices created in the library, schematic being drawn up to PCB board laid out ) this would be the final result :) Top Layer: http://i161.photobucket.com/albums/t...psemoh34hi.jpg Bottom Layer: http://i161.photobucket.com/albums/t...psz9jpqkv8.jpg Size is 58mm x 36mm ( 2.25" x 1.4" ) SW1 - Mode Select ( External / Disable ) D2 - Fault Indicator - signal is also available externally This board is capable of 6CH TOTAL ( CH0/CH1 and 2CH/CH3 share dimming controls ) Other than that these board will go on a Larger Main board that will hold the power rails and MOSFET's as well as it can house 4 of these modules in Master / Slave configuration. This configuration will give 8CH of control with 12CH of Output. Slave units will be receive data from master via serial and offer an additional 12CH of output. Please bare in mind that each channel is capable of 5A of current as well as operating up to 96VDC. Boards have been sent out and hoping to see the first batch in soon as well as more testing !!! |
All I can say is good on ya! That may as well be a martian language! Good luck with the soldering.
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Everything else will be done via a stencil and a re-flow oven :wink: Then again, some items can be omitted and/or left off in case you want to externally adjust things through the external components which will be mainly be through hole components :) |
Oh well of course! I completely forgot about stenciling and the re-flow oven.... ;)
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Things have evolved into something a bit more than just a "simple" board !!
Driver Modules them-self were redesigned to facilitate simpler routing on the main board. http://i161.photobucket.com/albums/t...psl2m1cq68.jpg http://i161.photobucket.com/albums/t...pshdpjenll.jpg The main board does not share a central power source either as each module ( up to 4 can be plugged into the main board ) have their separate power supplies, which comes in handy when your running LED strings with different voltages ( 2.4V - 2.7V VS 3.2V - 3.6 ) now doesn't have to be a logistical nightmare. http://i161.photobucket.com/albums/t...ps0qsmwjet.jpg http://i161.photobucket.com/albums/t...psmromn0qo.jpg Another change is the MOSFET implementation. By adding dedicated connectors for each MOSFET and Reference Resistor now channels can be "Enabled" or "Disabled" by powering down the unit and unplugging the MOSFET module. This was when the unit is powered back up it will check the MOSFET and Reference Resistor and if not found the chip will disable said channel. All the controls are available on the center of the board via a IDC header that can used as is, or use a number of Control boards that I have designed to be plug and play and offer a number of configurations on the fly. The I2C board allows one to use a single serial cable to control all 16 dimmers via an NXP PCA9685. This chip can be "addressed" so multiple units can run simultaneously on the same bus allowing LARGE light arrays to be controlled via a single controller. Currently ther is no on-board power for the chip and will be supplied externally via the I2C header either from the micro controller. I have been thinging of adding in a DC/DC buck converter, but at this time its just a speculation, but it may become reality as this project is evolving. http://i161.photobucket.com/albums/t...pspwe0ojfi.jpg http://i161.photobucket.com/albums/t...psxnccupyt.jpg In the works is an pure PWM board as well as a serial board board. Even though the IDC is available some "configuration" is required via the mode pin. Currently I'm working on a I2C shield for your standard arduino using 40x4 Character LCD and and a rotary encoder. Latter on complete controller package will be offered. This way a simple out of the box solution is available allowing each channel to be controlled independently as well as a single master control. |
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