User manual

The timer could also be set to 1,000 ms. It is also possible that
the second output will jerk on the LCD now and then because the
data overlap. It is better to set the update time a little faster
or just to half, to make the output appear more fluent.
In the VB.NET-timer function, a check is performed before the
actual output for safety purposes to see whether the serial
connection is opened. If this is the case,
SerialPort1.Write()
will
be used to transfer the time data. For this, we use the
function
Now()
. It contains the time and date and may be instructed
with the parameters
Hour
,
Minute
and
Second
to output only the desired
places. To convert the values for the transmission to bytes, each
value will be converted with
Char()
to one byte.
Our PC clock shows the precise time on the LCD now .
ANNEX
We distinguish between voltage, current, resistance and the
units in which the values are measured (e.g. Volt or Ampere).
Every unit has an abbreviation that is used in the formulas. The
abbreviations permit a short and well-structured annotation.
Instead of current equal 1 Ampere we write only I = 1 A.
These abbreviations are used in all formulas in his book.
Value
Abbreviation
Unit
Abbreviation
Voltage
U
Volt
V
Current
I
Ampere
A
Resistance
R
Ohm
Ω
Power
P
Watt
W
Frequency
f
Hertz
Hz
Time
t
Second
s
Wavelength
Λ
(Lambda)
Metres
m
Inductiveness
L
Henry
H
Capacity
C
Farad
F
Area
A
Square me-
m²