Nixie Clock IN-14 All-In-One, Руководство по монтажу

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High Voltage Circuit:
Parts List:
C5 22pF
C6 22pF
C1 2.2uF 400V
C7 100nF
C8 100nF
D2 UF4007
S28 SOCKET 28
Q2 16MHz
L1 100uH
R10 3k
Q1 IRF840
R1 390k
R2 4.7k
R30 10k
IC3 MEGA8-P
The high voltage circuit uses the micro-controller to drive the boost circuit with a high
frequency square wave, and has a feedback loop in which the controller reads the voltage
produced via an analogue input, and regulates the brightness of the tubes so that there is no
flickering or unwanted dimming.
Notes:
•
See the section on “Component Identification” for help with identifying the components.
•
C1 must go the right way round. The negative side is marked with a stripe (see hint).
•
Put Q1 so that the metal portion lines up with the white stripe on the board. The metal
side faces to the outside of the board.
•
D2 should be placed so that the white stripe on the body lines up with the white stripe
on the board.
•
Put the micro-controller socket in first and solder it. Make sure that the depression on
the end of the socket lines up with the marking on the board. When you put the chip in,
the chip should go in with the depression matching the silk screen on the board.
Warning!
Double check the orientation/location of the components before you
proceed!
Especially check that R1 and R2 are in the right positions, and that the
electrolytic capacitor C1 is the right way round. If you switch R1 and R2, you will
put 170V into the micro-controller, and this will destroy it.