tpd_pcb
Differences
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tpd_pcb [2018/03/22 22:48] ilmenator [Where to buy?] |
tpd_pcb [2018/04/13 14:18] ilmenator [BOM] added link to forum thread |
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| U3-U8 as well as well as C3-C8 are sitting below the LED matrix modules. Obviously, you have to solder them in __before__ you solder the matrix modules! **Important: make sure that you test for proper solder joints between each leg of U3-U8 to some point not located under the LED matrix modules. If there is a problem there you won't be able to fix it once the LED matrix modules are in place!** R1-R32 determine the brightness of the LED matrix modules. They are sitting on the backside of the PCB and can be changed even after you have soldered the LED matrix, should you find that necessary. The same goes for R41-R48 which adjust the brightness of the 7-segment LED displays. The 3mm duo LEDs I used are much brighter than the LED matrix modules, therefore I chose R=220Ω for these, the same value (and LED) Wilba suggests for his control surface PCB. | U3-U8 as well as well as C3-C8 are sitting below the LED matrix modules. Obviously, you have to solder them in __before__ you solder the matrix modules! **Important: make sure that you test for proper solder joints between each leg of U3-U8 to some point not located under the LED matrix modules. If there is a problem there you won't be able to fix it once the LED matrix modules are in place!** R1-R32 determine the brightness of the LED matrix modules. They are sitting on the backside of the PCB and can be changed even after you have soldered the LED matrix, should you find that necessary. The same goes for R41-R48 which adjust the brightness of the 7-segment LED displays. The 3mm duo LEDs I used are much brighter than the LED matrix modules, therefore I chose R=220Ω for these, the same value (and LED) Wilba suggests for his control surface PCB. | ||
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| + | There is a [[http://midibox.org/forums/topic/20807-tpd-testing-and-configuration-questions/|thread]] over on the MIDIbox Forum discussing TPD testing and configuration. | ||
| The most exotic component on this board is the red/green double color dot matrix module. As the LEDs are controlled via a matrix approach, it does not really matter whether you choose common cathode or common anode modules - both will work, you'll just have to specify that in the config file. I bought mine on ebay, and they are common anode types (although they were sold to me as common cathode types!). Make sure that the pinout follows this {{:home:users:ilmenator:ysm-1288cr3g2c.pdf|duo LED matrix datasheet}}! | The most exotic component on this board is the red/green double color dot matrix module. As the LEDs are controlled via a matrix approach, it does not really matter whether you choose common cathode or common anode modules - both will work, you'll just have to specify that in the config file. I bought mine on ebay, and they are common anode types (although they were sold to me as common cathode types!). Make sure that the pinout follows this {{:home:users:ilmenator:ysm-1288cr3g2c.pdf|duo LED matrix datasheet}}! | ||
tpd_pcb.txt · Last modified: 2022/05/11 06:56 by ilmenator
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