Now that the PCB is complete, I'd like to modify the alarm clock to incorporate the board and assemble an alarm clock-style nixie tube clock.
●Thin Phillips screwdriver
(The 100-yen stuff is weak or turns white or hardens quickly and becomes unusable, but this instant adhesive is strong and doesn't harden inside, so it will last a long time.)
●Strong double-sided tape (100 yen tape is OK)
●Ruler (30 cm or more)
Disassemble the alarm clock
First, remove the three screws on the back of the alarm clock and remove the back cover.
Pull out the pin at the base of the hammer part that strikes the bell. Also, remove the screws holding the motor in place.
Remove the hammer part that strikes the bell. Also, remove the motor.
Loosen and remove the screws on the bell with radio pliers and remove the bell.
Remove the stick that the bell was attached to and the foot by loosening it with radio pliers.
Pull out and remove the clock unit inside. We also pull out the clear plastic round parts.
Modify the clock
Modifying parts of the bell-striking hammer
Reuse the parts that strike the bell.
Remove the screws and disassemble.
Cut with strong nippers so that the legs of the hammer are as long as possible.
Bend it with needle-nose pliers at a length of 12 mm from the hammer part.
Secure it with instant glue.
It goes something like this.
Put a ripple board
Cut the flipboard in 29.3 cm lengths and use the longer one. The shorter one will be used after this one, so keep it.
Stick the ripple board inside the alarm clock.
The purpose of this is to blacken the inside of the clock for a better look and to preserve the PCB.
Attach the double-sided tape to both ends of the flat side of the flipboard.
Put the flipboard inside the watch so that the top right or top left of the watch is a seam.
Attach the glass to the bottom so that it is held down by the flipboard.
Attach the legs and bell
Attach the legs. Penetrate through the hole with an awl ...
Attach the legs and bell and replace. The screws are easy to loosen, so use needle-nose pliers to tighten the screws firmly.
The modification of the alarm clock has been completed.
Modify the back cover
Cut out the protrusions on the back cover with pliers.
Close the large hole that originally had a knob such as time adjustment.
Stick double-sided tape around the screw holes.
Stick the piece of the ripple board we used earlier on the back.
The big hole is closed and it looks better.
Embed the PCB
Place the PCB inside. Place the PCB on top of the ripple board.
Secure the PCB and the clock with a glue gun.
Put the USB cable through the square hole on the left side of the back cover.
Connect the USB cable to the USB connector on the microcontroller board.
Glue the back cover to the alarm clock body using a glue gun. Hot-bond the inside of the alarm clock in about three places and fit the back cover.
The Nixie tube clock in the style of an alarm clock was completed.
Since it has a built-in GPS receiver, the time will be displayed within 15 to 30 minutes of being powered from USB.
I displayed it on my desk. Nixie tubes are great.