Showing posts with label electronics. Show all posts
Showing posts with label electronics. Show all posts

Wednesday, May 14, 2014

Placing Your Cigar Box Guitar Frets

The cool thing with Cigar Box Guitars is that they are custom. There are no rules is the motto and as such if you wing some of your implementation (like I did) you end up with a custom instrument and then some.

I had been playing the guitar for 2 days when I decided it is time to add some frets and the Piezo pickups. The Frets so that it is easier for the kids (and myself) to learn on this guitar. The Piezo pickups so I have a lo-fi electric guitar I can jack into my amp.

I measured from my nut to my bridge and I came up with 676 millimetres. Of that only 510 millimetres are usable for the frets. How do I figure out the fretting for this?

This is where Stewart MacDonald comes in. He has some handy informational pages on stringed instrument construction and one of those is a Fret Calculator.

Here were the calculations it gave me for my setup:

From this I placed test measurements to see if the generated fret placements work well. Once I tested the locations and made a few adjustments for slide versus chord playing I marked the frets with a black marker and square.

Then some fret markers and additional fret markers along the top of the neck to help the boys find the frets without needing to turn the guitar up to see the frets.

Volia, custom frets without physical frets to make slide playing easier. Note that with medium strings this makes playing the first 3 frets difficult with chords since there is no fret to use to push the string against. So, this may limit my ability to play chords in this region. If it turns into a problem I may add a physical fret to the first 3 frets to compensate for that issue.

Friday, January 17, 2014

Snap Circuits

My oldest got a Snap Circuits Kit when is was 4.  He loved it, but being for an 8 year old it saw a lot of broken projects that Dad assisted with to get going.



Flip forward to this year and he got one again (he got one from his uncle which is good since most of the original parts from the first are missing).  Being 8 now he is having no trouble with it and hooking up lots of projects.

Today, I decided to give it a try with our younger son, 5 years old.  He was ecstatic to get to play with it.

It just so happened that today was sharing day at school and the letter of the day was D.  One of his best friends in class brought in the same Snap Circuits Kit and his D word was "Diode".  Tell that is not cool for show and tell in kindergarten.

So, the fact I had planned to do the Snap Circuits today hit home today when his friend brought the same kit to school to show.

We built a couple of the basic projects.  Then I hooked up the Space War with Alarm and Lights project.  He loved it.  He liked experimenting and changing circuit components.

There is also a blown resistor in the kit (I assume that a circuit was hooked up wrong, needless to say the resistor is a full on resistor, nothing goes through it).  He used the blown resister to close sections of the circuit.  He did this for about 20 mins, just trying out different combinations.

It was fun to watch and observe as he explored.



If you have a 5+ year old and are going to help with circuits, this is a cheap way to introduce circuits to them and have some fun.

For 8+, just buy it for them and play with it when they are not around, like I do ;-)

Now, to go disassemble the resistor and replace it with a new one (a benefit of being a GeekDad is I have some resistors lying around).