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  • FRDM4236's Avatar
    12-30-2021, 03:41 AM
    After some troubleshooting I found the cause why it did not run the Blink-A-LED. The PSRAM was not working because one pin was not connected to the PICO-D4. When the PSRAM is not working, the TinyPICO will stay in...
    9 replies | 985 view(s)
  • FRDM4236's Avatar
    12-29-2021, 05:24 PM
    Before I tested the LPF I just plugged the board in a USB port to check it out. It looked OK and nothing was burning my finger. After added a through hole resistor and a cap on the reset pin I uploaded the Blink-A-LED...
    9 replies | 985 view(s)
  • FRDM4236's Avatar
    12-29-2021, 04:34 AM
    The LPF works. Finally I got my equipment unpacked and I could use my scope again. The flickering pulse from the charger is about 12 Hz,10% duty cycle, 10% low and 90% high. The 10% low turns on the orange LED. The...
    2 replies | 321 view(s)
  • FRDM4236's Avatar
    12-18-2021, 04:58 AM
    I sent out the Gerber files on 12/13, the PCB house has not started making it until today. If they don't start it, I will not have a delivery date. Everyday I asked them to start rolling the ball, but nothing...
    9 replies | 985 view(s)
  • FRDM4236's Avatar
    12-12-2021, 05:09 AM
    My PCB layout is done. I hope that I can get an assembled board in two weeks. Someone is going to assemble it for me. The board is denser than my Mini_T32 board, it should take longer to finish, but it was...
    9 replies | 985 view(s)
  • FRDM4236's Avatar
    12-12-2021, 01:27 AM
    My PCB layout which will shrink the TinyPICO is done and will be sent out tomorrow. During the design process I found that the orange LED on the TinyPICO board flashing when no battery is connected. It's a bit...
    2 replies | 321 view(s)
  • FRDM4236's Avatar
    12-09-2021, 09:06 AM
    Thanks defragster for your suggestions. The JST battery connector can be added later, I am thinking about all options. The PSRAM will be on the top, I will try to use 0402 as many as possible, at least all...
    9 replies | 985 view(s)
  • FRDM4236's Avatar
    12-06-2021, 06:31 AM
    After several version changes, I placed all components on the size of my Mini-T3.2. Top layer only, including the PSRAM. The CH340G has no DTR signal, so I have to use the CP2104. For a good reason I extended the PCB...
    9 replies | 985 view(s)
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Shrink the TinyPICO 12-30-2021 03:41 AM
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10-09-2019