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related:electrosofts.com/8051/keyboard.html
The data and clocks lines are connected to 5V through 5 Kohm external pullups. and to the oscilloscope. There are no connections to the microcontroller. Do I have to give it a permission-to-send command?
interfacing keyboard to microcontroller
My bad. The three LED lights DO flash after power up. The Data and Clock lines are held high at 5 V and remain there even when pressing on a key continuously. I'm using an AT keyboard.
interfacing keyboard with 8051
The lights don't flash after power up. However, it does work when plugging it into a motherboard. When I press a key continuously should I see signals on the Data and Clocks lines using the oscilloscope? I've tried this test on 3 keyboards already, coming up short...
keyboard microcontroller
I'm having a problem getting my 5 pin keyboard to interface to my microcontroller. I have the Vcc and GND lines connected to 5V and ground. I'm using an oscilloscope to read the Data and Clock lines but come up short. Even when I'm holding a key down continuously, the...
swr meter connect
I'm trying to tune an antenna to work at 13.56 MHz. We've got a SWR meter at school with only one input. However, the antenna manual I've been reading says that I need to tune the antenna using a SWR meter with 2 inputs - one for the antenna and the other for the transmitter...
spectrum analyzer antenna
I'm trying to tune my antenna (to operate at 13.56 MHz) for an RFID application. My school has a network analyzer. I was wondering:
1. If I can use a network analyzer to tune my antenna?
2. How would I got about doing so?
Thanks,
Drew
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