Figure 4. Close-up of 660 One Step sonar board.
that any other company has come out with long range
sonar boards, which makes these hacks still useful today
as low cost, long range (out to about five meters or so)
sonar sensors. You can still get these cameras cheap on
eBay. Do NOT pay more than $5 for these cameras! Some
people think they are antiques and worth their weight in
gold; don’t bother with those sales.
Q. I want to get into PIC programming. I found circuits on the internet that I can build into a cheap programmer for the PIC16F84. Can you
help me with them?
— Robert (via email)
16 SERVO 11.2011
A. I hear from people trying to make the NOPPP (No Parts PIC Programmer) every once in a while, but rather less these days. This is really old information
that — while it works — is really not worth your time and
frustration. It requires a custom, bit-banged programmer
interface and software that was written long ago, and isn’t
really supported any more. You would do yourself a favor
to save up a little money and get a genuine Microchip
PICkit 3 for about $50 US which will allow you to
program and even debug many of the Microchip parts. If
you want even cheaper, you can get a Cytron PICkit 2
clone for about $20 US or an Olimex PICkit 3 clone for
about $30 US. All of these are MPLAB compatible and
will work with a variety of PIC processors. Places to look
for MPLAB compatible Microchip or compatible
There are more; these just came
off the top of my head.