| R1 | 10K | Resistor |
| R2 | 1.5K | Resistor |
| D2 | 5.1V/0.5W | Zener |
| D3 | 1N4148 or 1N4448 | Diode |
| D4 | 1N4148 or 1N4448 | Diode |
| D5 | 1N4148 or 1N4448 | Diode |
| D6 | 8.2V/0.5W | Zener |
| D7 | 1N4148 or 1N4448 | Diode |
| C2 | 100µF/25V | Capacitor electrolytic |
| C3 | 22µF/16V or 47µF/6.3V | Capacitor tantal |
| Q1 | BC547B | Transistor NPN |
| Q2 | BC547B | Transistor NPN |
| P1 | DS25 (female) | 25 pol DSUB connector |
| P2 | | Connector for In Circuit Programming |
| Remember the two jumbers under the socket. |
PCB Generatet by
PCBTOPCX. (Able to generate 600dpi
and 720 dpi too.)
Download layout files, PCB23.ZIP (22K).
(Includes files for PCBTOPCX.) |
How to print out and scale PCB:
The files are saved as 300 dpi.
If you like to print out in 300 dpi,
go directly to how to print PCB with imaging for
windows.
Scale:
If you like to scale PCB use Irfanview. (It is
downloadable as freeware.)
If you like to scale for a canon printer (180dpi, 360dpi,
720 dpi, 1440 dpi or 2880 dpi etc.) Then first scale to 360
dpi, using resize/resample with "B-Spline filter" option and
scale with 120%. Now you have 360 dpi resoultion. To get higher
resolution, scale again, "B-Spline filter" on again. At last, you need to
Enhance Collors and convert to black/white. Use Enhance
Collors, do not change Brightness, but change contrast to
max (127.). Set gamma correction to a low value for a "hard"
pcb, or to a high value for more round style/edges. Use
Enchance Collors finaly again, to get a black / white pcb.
Again with max. contrast, this with gamma set to e.g zero.
Finaly you have a black/white pcb, ready to print out. With
round edges if you like. Other software than irfanview may not
be able to produce exact same results.
If you have a HP, Lexmark, etc. (with 300dpi, 600dpi,
1200dpi or 2400 dpi): Do as above, but not scale to 360 dpi
first. Just resize to desired size using resize/resample,
and "B-Spline filter". Sometimes, it may be better to scale
to 600 dpi, before scaling to 1200 dpi.
At last, Enhance Collors with
changing contrast to maximum, and gamma corrections to the
desired roundness. And use Enhance Collors at a last time, with
maximum contrast, gamma=0, to obtain black / white only. You may like
to decrease collor depth to two.
Other software than irfanview may not
be able to produce same results.
How to print out, with imaging for windows (win 98)
Load the file, change to 100% view for looking how print looks.
Then use PRINT, and select "PIXEL to PIXEL"!.
From the printer configuration, select B/W, and
resolution dpi.
(300 dpi if not scaled only, else scale).
