Datasheet

Electronic Dice Essentials
www.kitronik.co.uk/2109
Do any
LEDs
light?
No
Yes
Do all
LEDs light in
sequence?
Yes
Yes
Check
 The batteries are good and in the
right way around
 Check the power clip is connected
the right way around and soldered
correctly.
 IC1 pin 1 & 8 for dry joints
 IC1 is in the right way (the notch
is next to the power leads)
Do 3 or 4
LEDs light at
the same
time?
Check
 For dry joints on
SW1
 For a dry joint on
IC1 pin 4
No
Fault finding flow chart - page 1
Start
Power the board up
Do the LEDs
flash, then stop
on release?
Yes
No - nothing happens
when pressed
Stop
There is a short
between IC1 pins
3 and 4
Is LED6
and LED7 on
constantly?
Yes
Pin 7 & 8
on IC1 are
shorted
together
No - they keep flashing
upon release
Go to page 2
No
Push and release the
switch (SW1)
There is a short
on IC1 pin 6 and
an adjacent pin
No
Power up
sequence
Do any
LEDs
light?
No
Yes
Do all
LEDs light in
sequence?
Yes
Yes
Check
 The batteries are good and in the
right way around
 Check the power clip is connected
the right way around and soldered
correctly.
 IC1 pin 1 & 8 for dry joints
 IC1 is in the right way (the notch
is next to the power leads)
Do 3 or 4
LEDs light at
the same
time?
Check
 For dry joints on
SW1
 For a dry joint on
IC1 pin 4
No
Fault finding flow chart - page 1
Start
Power the board up
Do the LEDs
flash, then stop
on release?
Yes
No - nothing happens
when pressed
Stop
There is a short
between IC1 pins
3 and 4
Is LED6
and LED7 on
constantly?
Yes
Pin 7 & 8
on IC1 are
shorted
together
No - they keep flashing
upon release
Go to page 2
No
Push and release the
switch (SW1)
There is a short
on IC1 pin 6 and
an adjacent pin
No
Power up
sequence