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The gray square indicates the pin state is unknown (not high/not low). Fixing the LED (per FvM) may correct it or it might just be the way the part is simulated.
If there's a flat on the motor shaft, you could use an appropriate proximity detector to detect the flat and count that. You can also try adding an encoder like mechanism to the shaft to count pulses. Ideally, your motor wouldn't have too much vibration and it might be relatively random.
It will be flat if the amplifier input is purely resistive. Any reactance will vary with frequency. It will dip when the reactance is at the match impedance.
If you are not reading back a SPI value, it should be terminated like any other unused input. If you are creating a PCB, I would suggest adding a pull-up that could be removed if you ever wanted to wire in a read function in the future.
The RX input of the unused communications device should also be pulled to logic high. The is the idle state for the PIC TX line. Leaving it floating or low has caused me problems when switching between different devices. I'm switching on the digital side since I need to route to other uCs as...
I'm designing a daughter board using OrCad Layout (old, I know). The board has 2 40 pin connectors at opposite ends. Both connectors have VCC net connections to the main board. The main board has the power supply and supplies VCC to multiple pins on each connector. I routed the board to use the...
Have you looked at Microchip? I have been using some of the lower cell count versions to replace EPM3064/EPM7064 parts. These might be what you're looking for. You may need a different programmer...
I'm not an Altium user either but, I believe, the components that stick together are in a room. The original designer wanted to keep them together for some reason or another so they put them in a room.
The off page connectors are in the CAPSYM.olb library. First, make a copy of this library in the event you mess it up.
The easiest way to add a new connector is to open the library, load one of the symbols, and save it with your new name. Just to make sure, close the symbol and load the one you...
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