Gemini Two Tube Clock
8
Update #1 (21
st
May 2019)
www.nixology.uk
Assembly of the PCB
DUE TO PRODUCT DEVELOPMENT AND IMPROVEMENTS, YOUR PCB MAY
NOT LOOK EXACTLY LIKE THE ONE PICTURED.
Resistors
Start by adding the resistors to the top side of the board. If you are in any doubt
as to what the values of the resistors are then use a multimeter to check them.
R1, R2
100R
(
Brown
, Black, Black, Black)
R3, R4
10K
(
Brown
, Black, Black,
Red
)
Sockets and Headers
These are all mounted on the top of the PCB. Add the 3 x 16 pin IC Sockets
–
note that the orientation differs between each socket, take care to orient the
‘notch’ in the socket with the symbol on the PCB.
Next Add the two 2x6 male headers for the tube connections.
Next Add the 8 pin DIL socket for the Opto Couplers.
