A simple SI-Prog
With the following circuit you can easily program the
AVR microcontrollers AT90S1200, AT90S2313 (or ATtiny2313),
AT90S8515 and AT90S4414, using the freeware programmer PonyProg
by Claudio Lanconelli. You can download the program for free
from the author's website (www.lancos.com/prog.html).
The simple SI-Prog is actually a simplification of the
more complicated programmer designed by Claudio Lanconelli,
which is supporting a large number of programmable devices.
the author's site for more details:
- Two 10KÙ resistors (1/4 Watt).
- One 15KÙ resistor (1/4 Watt).
- Two 4.5KÙ resistors (1/4 Watt).
- Two 27pF capacitors (ceramic).
- Two Zener diodes at 5.1V (low Watt).
- One 1N4001 common diode.
- One BJT transistor BC547.
- One common 7805 voltage regulator (you don't need any cooler).
- One 4MHz piezoelectric crystal.
- A 20 pin DIP socket.
- A 40 pin DIP socket.
- A female 9 pin DSUB connector (for PCB).
- Male pin header (6 pins. If you have one with more pins, just
- One power jack (for PCB).
- A small piece of a Veroboard.
- Wire for connections.
- Solder and soldering iron.
Also you will need a stabilized 9V or 12V external power
supply. A 9 Volt alkaline battery is the perfect choice.
Here is the schematic diagram of the simple SI-Prog (click on the picture to enlarge)
Attention: The circuit includes an adaptor to extend
the number of the supported AVR microcontrollers. Simply connect
each pin of the adaptor to the appropriate pins of the
microcontroller (MISO pin of the adaptor with MISO I/O of the
microcontroller, etc) without using additional
Remember to connect a piezoelectric crystal
(usually 4, 8 or 10MHz) to the XTAL pins of the microcontroller or the programming procedure
will fail. Note: With the newer AVR micros that
include an internal crystal, you don't need the additional
piezoelectric crystal. If this is the case, you simply connect
the adaptor with the appropriate pins of the microcontroller and
you are ready to program!
following picture you see the programmer build on small piece
of a Veroboard.