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Step 34Build the controller: IC sockets, resistors and connectors
In this step you will be soldering in the main components of the multiplexer array.
Our main design consideration here was to minimize soldering and wiring. We opted to place the connectors as close to the ICs as possible. On the output-side, there is only two solder joints per LED cube column. IC-resistor, resistor-connector. The outputs of the latches are arranged in order 0-7, so this works out great. If we remember correctly, the latch we are using is available in two versions, one with the inputs and outputs in sequential order, and one with the in- and outputs in seemingly random order. Do not get that one! ;) Don't worry, it has a different 74HC-xxx name, so you'll be good if you stick to our component list.
In the first picture, you can see that we have placed all the IC sockets, resistors and connectors. We squeezed it as tight as possible, to leave room for unforeseen stuff in the future, like buttons or status LEDs.
In the second picture, you can see the solder joints between the resistors and the IC sockets and connectors. Note that the input side of the latch IC sockets haven't been soldered yet in this picture.
Our main design consideration here was to minimize soldering and wiring. We opted to place the connectors as close to the ICs as possible. On the output-side, there is only two solder joints per LED cube column. IC-resistor, resistor-connector. The outputs of the latches are arranged in order 0-7, so this works out great. If we remember correctly, the latch we are using is available in two versions, one with the inputs and outputs in sequential order, and one with the in- and outputs in seemingly random order. Do not get that one! ;) Don't worry, it has a different 74HC-xxx name, so you'll be good if you stick to our component list.
In the first picture, you can see that we have placed all the IC sockets, resistors and connectors. We squeezed it as tight as possible, to leave room for unforeseen stuff in the future, like buttons or status LEDs.
In the second picture, you can see the solder joints between the resistors and the IC sockets and connectors. Note that the input side of the latch IC sockets haven't been soldered yet in this picture.
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Jan 11, 2011. 9:28 PMbakerlogan
says:
What ohm are the resistors being used?
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Feb 13, 2011. 2:14 AM
pehan
says:
pehan
says:
100 Ohm resistors
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