■ FIGURE 8.
for the SUSB-01.
jumper to the trace at
A4. Figure 9 is a
photo of the completed
SUSB-01 adapter. In
it, you can see that I
have painted the tops
of the male header
pins in my standard
color scheme (black
= ground, yellow =
sout, and green = sin)
to help me make the
correct connections to the PICAXE
processor. Figure 10 shows the
SUSB-01 installed on the same breadboard I used earlier in Figure 5.
Again, be sure to include the 100K
resistor that ties the serin line to
ground so that your project will still
function correctly when the SUSB-01
is removed from the circuit.
adapters for the Arduino processors
but apparently they don’t work with
the Programming Editor, at least not
without modification. As soon as I
get the time, I plan to do some
experimentation with a couple of
them – I’ll keep you posted on my
progress (or lack thereof).
With these two additional boards
in our arsenal, all of our previous
stripboard programming adapters and
project boards will continue to function,
either with a serial or a USB programming connection. As I mentioned
earlier, if you have a USB adapter
other than the AXE027 cable and it
has been working with your PICAXE
projects, let me know. I would like to
develop a list of PICAXE-compatible
USB adapters and place it on my
website. I know there are several USB
In the next Primer installment,
we’re going to turn our attention to
seven-segment LED displays. First,
we’ll conduct a couple of simple
programming experiments with a
single-digit LED display and a 20M
processor. Then, we’ll turn our
attention to the MAX7219 serially
interfaced LED display driver which
greatly simplifies the circuitry
normally required to interface
■ FIGURE 9. The completed SUSB-01.
■ FIGURE 10. The SUSB-01
on a breadboard.
multiple LED displays with a microcontroller. We’ll take advantage of
this simplification to develop a
four-digit peripheral LED display for
use in our upcoming projects.
In the meantime, if you want to
familiarize yourself with the 7219,
you may want to download a copy
of the datasheet (available at
See you next time! NV
Check the Nuts & Volts website at www.
nutsvolts.com for accompanying downloads.
Order online at:
Development Tools for PIC® MCUs
microEngineering Labs, Inc.
Phone: (719) 520-5323
Fax: (719) 520-1867
Colorado Springs, CO 80960
With Accessories for $119.95:
October 2009 71