Homemade lap steel guitar

The lap steel guitar is a type of steel guitar, an instrument derived from and similar to the guitar. The player changes pitch by pressing a metal or glass bar against the strings instead of by pressing strings against the fretboard.

This is my homemade lap steel guitar.
It is built using a 6.5cm x 4.5cm x 85cm piece of wood taken from an old pallet, then planed and sanded.
The action is 1cm height. Bridge and nut are built using L shape aluminium bar of 1cm x 1cm. An additional aluminium bar is mounted and perforated to lead strings out of the nut to the tunings pegs. Nut and bridge has string slot. Strings are 1 cm apart from each other.
Tunings pegs are standard electric guitar pegs.

Sound is amplified using a stratocaster model like pickup, at 5cm from the bridge. It has 2 250pots one log and the other linear, used for tone and volume.
Fret reference are drawn on the wood, before the transparent lucid finiture paint was given.
The scale is 22 1/2".

Scale length 571.5mm 22.5"
Fret	Distance (mm)	Distance (inches)
1	32.08	1.263
2	62.35	2.455
3	90.93	3.580
4	117.90	4.642
5	143.36	5.644
6	167.39	6.590
7	190.07	7.483
8	211.48	8.326
9	231.69	9.121
10	250.76	9.872
11	268.76	10.581
12	285.75	11.250
13	301.79	11.881
14	316.93	12.477
15	331.22	13.040
16	344.70	13.571
17	357.43	14.072
18	369.45	14.545
19	380.79	14.992
20	391.49	15.413
21	401.59	15.811
22	411.13	16.186
23	420.13	16.541
24	428.63	16.875
25	436.65	17.191
* Distance is measured from the nut

About the video: this is my first lap steel guitar, I've never played one, so i've to to practice a little more to play it better, but that's just a demo video.

Notes

• read risk disclaimer
• excuse my bad english

Drum light trigger that uses leds, a NE555 timer and a piezo transducer

This circuit is a Drum Light Trigger.

It uses a piezo transducer that reacts to drum vibration, and a NE555 timer to setup the light time.
There are two trimmer pot, one to setup the sensibility of the vibration, the other to set how long the LED light will be active.
This design is a small makeover of a circuit i've printed from an online image, unfortunately i can not recover the original author.

About the video: The piezo is attached to kick drumhead, and the led strip is inside the kick. I'm not a drummer, so there may be many imperfections in the way i play, but it's just a video to show you how this drum trigger wors. I've just add some synthesizers and guitars to make it sounds better. For those how are interested in, it is recorded using one wm-61a phantom powered condenser mic, and then processed a little using the Reaper digital audio workstation software.

Find the attachment schematics below.

Notes

• read risk disclaimer
• excuse my bad english