Nikon D90 User Manual page 13

Battery
The HugyCheck system runs on a single CR123A 3V battery.
Please make sure to install this battery correctly as a reversed polarity will
damage the circuitry. Do not use batteries with a voltage higher than 3 Volt
as this will damage the electronics.
Strobe switchboard
The HugyCheck system is developed to allow all possible combinations be-
tween camera and external strobes. Given the amount of possible combina-
tions and settings, we advise you to read this section carefully.
J1
SW1
Hugyfot Housing for
The camera hot shoe cable can be connected
J2
to either J1 (direct) or J2 (converter) on the cir-
cuit board. The J2 connecter is only to be used
when the optional TTL converter is installed.
When no TTL converter is installed inside the
housing and the camera hot shoe is connected
to J2, the strobes won't fire.
The J1 connecter is used when strobes are used
J3
in manual mode or when strobes are used that
are fully iTTL or eTTL compatible (e.g. Nikon
J4
SB 800, Canon 580 EX, Subtronic dttl, ...)
Next to J1 is a switchboard SW1 which contains
6 switches (3 for each strobe) which control the
Q, the SP and the Ready signal on both exter-
nal strobe connections. By using these switch-
es one can individually control the Q, the SP
and the Ready signal on each strobe connec-
tion. The X and the Ground signal (as well as
the 6th Canon line in case of Canon hou sings)
are permanently wired through and cannot be
switched off.
Nikon D90 13 User manual