Additionally, the project Eagle files are contained on the project Dropbox. These files can be
opened using the free Eagle version.
The main board will operate happily without the display board plugged in. Therefore, you can
detach the display board and flip the main board over so you have easy access to its component
side.
Obviously, given the number of subsystems on the main board it is not possible to go any further
with advice on trouble shooting a problem on the main board. However, if you have a problem
then please feel free to contact us and we will try to help. As a last resort you can return the board
(to Scotland) and it will be fixed. Depending on the nature of the fault there may be a fee and
maybe a return postage cost.
Display Board testing
Because the E1T tubes and display board drivers for them are slightly unusual, a more detailed
explanation is given here on what you might expect to find.
When probing points on the board, take extreme care that you do not accidentally short
adjacent connections. There are a wide range of digital and power traces on the board.
Shorting digital to power will almost certainly damage the SAM3X8C and possibly other
components. Shorting power to ground will most likely damage the corresponding
convertor or regulator.
Due to component tolerances the 300V, 6.3V and the four regulated voltages on the display
voltages will vary. These are what I measured on the prototype clock:
I had no problems with the variability you see here. Widely differing voltages from those listed
indicates a problem of course.
Desired Voltage
Measured Voltage
300V
300.5V
6.3V
6.23V
156V
158.1V
30V
30.6V
15V
16.2V
12V
13.1V
https://www.autodesk.com/products/eagle/free-download
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Содержание An E1T Timepiece
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