Verify you have all the components shown here, and prep your solder station and tools.

When installing ICs, it is very important to keep the orientations correct. The PCB has markings, but you can also refer to this image to confirm. Pay attention to the printing on the top of the ICs. Once in place, flip the board over and solder the pins from the bottom.

Pre-bend and separate all resistors by type. There will be x10 1k resistors, x8 10k resistors, and one of each of the 10M, 3M3, and 4M7 resistors.

Insert the ten 1k resistors on the left side of the board. Flip the board and solder them. The board has printed values for each resistor type, or refer to the image here.

Insert the eight 10k resistors on the right side of the board. Flip the board and solder them. The board has printed values for each resistor type, or refer to the image here.

There are only one of each of the 3M3, 4M7, and 10M resistors. Take special care to identify that your resistors are correct as shown, so that you know where to place them on the board.

The 10M and 3M3 resistors go in the top right of the board, as labeled.

The 4M7 resistor goes just above the decade counter IC, near the bottom of the board, as labeled.

There are x2 PNP and x4 NPN Transistors included. Verify which is which by the printed markings on the components.

The x4 NPN transistors are installed near the bottom of the board. The orientation is critical, so be sure to line up the curved edge with the curved marking on the board, as shown.

The x2 PNP transistors are installed near the top of the board. The orientation is critical, so be sure to line up the curved edge with the curved marking on the board, as shown.

Both of these components will be installed near the top as marked on the board.

The 10µF capacitor must go in with the short leg in the white marking as shown. Polarity is crucial for this component.

The capacitor cap should look like this when installed correctly.

When installing the 7 LEDs in the middle, the short leg must go into the white marking as shown.

Install the 100nF capacitor towards the top of the board as shown. The orientation does not matter.

The switch should be oriented to face outward as shown. When installing, be careful to use as little heat as possible since the switch can melt somewhat easily.

Double check from the underside that there are no pins bridged, as the switch pins can be very close together.

Flip the board to the underside and install the battery connector in this orientation as shown. Be careful not to install it backwards!

Plug in a 9-volt battery to the other end of the connector, and you're done! The vibration switch itself is quite sensitive, so after shaking it, try to keep it still. Thank you for building!