Cryptic letters are codes for Japanese/Chinese
characters. English readers may skip them.
$B$^$9!#$7$+$7!"[email protected];:$N0Y$J$i$H$b$+$/!"$?$C$?#[email protected]=:n$N$?$a$K(B
[email protected]$lC<$rI,MW$J>l=j$KI,[email protected][email protected]\Ce:^$GE=$j$D$1$F$=$3$rB-3]$+$j$KG[@~(B
$B$^$?!"(Bdead-bug construction $B$H$h$P$l$kJ}K!$G$O!"(BIC$B$d%H%i%s%8%9%?$J$I$r(B
[email protected]$N>e$K$"$*$`[email protected]\Ce:^$GE=$j$D$1$FB-$,>e8~$-$K$J$k$h$&$K$7$^$9!#(B
A puristic homebrewer would make a neat printed circuit board by
Although it is effective for mass production like club kits,
many homebrewers like me may think that it is too complicated
for a single construction.
A variety of dirty-but-easy construction methods are well known among
One cuts a printed circuit board stock into many small chips of
sevral millimeters square.
These chips are glued on another PCB stock.
used as "lands" for hookup of
Instead of these chips, several-megaohm resistors could be also used
as stand-offs. Several-megaohm resistos are practically "insulators"
in most applications.
The dead-bug construction method is also famous. One glues IC's and
transistors upside down on a PCB stock with their pins pointing
upwards. The pins could be bent by 90 degrees
to point sidewards as well.
Then resistors and capacitors are soldered on these pins.
Following is yet another method, which I am trying successfully these days.
In Japan, we have a hand-drilling tool called "nezumi-ba kiri" for
woodworks like one shown in Fig.(a).
I do not know whether similar one exists in other countries.
This tool is originally used to drill a hole of several millimeters
diameter in wood.
If you drill a PCB with this tool and stop before you go
through the board, you get a circular insulated "island" with a small
hole at the center.
This island is used for hookup of components as is shown in Fig.(b).
It is better to shorten the center spearhead by a file
as shown in Fig.(c) so
that the center hole does not go through the board before annular
trace is formed.
Last revised 1997-09-03.