A FEW bugs seem to have crept into some of the Body Build circuit
diagrams. In the March 1984 issue of The Micro User, Figure II
shows VR1 as 100K. It should be 100R, as stated correctly in the
parts list.
Also some of the ZN427 ICs will work even faster than the clock
adjustment provides for. If this is the case with yours you can
reduce R4 to 75R or even remove it altogether, replacing it with
a wire link.
The real time clock in the February 1984 issue has a few problems
as well. The four data lines D0 to D3 have been transposed on
the diagram on Page 117.
So the connection labelled D3 should read D0 and D2 should read
D1, etc. To make matters worse, in the kits there was an error
on the first issue of the printed circuit board.
Look under the battery, and if it says RTC1 then you need to
do a small mod to stop the battery discharging when it is left
connected to a switched off computer.
Remove resistor R1 and resolder it across the diode marked D2,
either on top or on the copper foil side.
If you have the second issue board with RTC2 on the underside
of the printed circuit there is no need to bother.
The component suppliers presented us with a mixed box of BC182
and BC182L transistors.
The two transistors are identical except for their pinout.
As the board was laid out for the BC182 an errata sheet was
included in the kits. You should check carefully which type of
transistor you have and only take notice of the sheet if you have
the BC182L.
