circuit board, the jacks were installed into the
enclosure and then wires were connected
from the board to the jacks. The assembled
unit is shown in Figure 9.
Though commercial oscilloscope probes
can be used with the PC o-scope, I thought it
would be nice to have some rugged
customized probes more suited to automotive
and project testing. Figure 10 shows some of
my homebrew and commercial probes.
First, I wanted to be able to connect them
to test points that may be a few feet apart.
Second, it was desirable to connect different
types of probe attachments to the probe ends.
What was chosen were multimeter probe leads
that would allow for attaching a test probe,
To minimize noise, coaxial cable was used
for the signal. The ground shield end had a
multimeter test lead end soldered to it that allows for
extended test hook-ups and attaching a probe, alligator clip,
or spring-hook probe end.
Figure 10B shows a cable with a BNC connector on
one end and the other end stripped and tinned to be
connected to either probes, alligator clips, or spring-hook
connectors. Figure 10C shows a commercial oscilloscope
probe with a BNC connector. Figure 10D shows a BNC to
RCA adapter used to transition the commercial probe, or
the probe in Figure 10C to the PC scope unit.
Using the PC O-Scope
Using the PC o-scope is very straightforward. Refer to
Figure 11 for the following discussion. Connect the output
of the PC o-scope (the 1/8” stereo jack) to the
microphone input jack of your laptop, desktop, or tablet
computer (Figure 11B).
26 August 2016
■ FIGURE 9.
■ FIGURE 7.
■ FIGURE 8.
■ FIGURE 10.