The latest stuff done

How to repair broken glasses

Some people need glasses, and I am one of them.

Sometimes they are destroyed, and it´s very annoying to wait up to two weeks for new ones (and also manage to find time to meet the optician during busy days).

One of the most regular incidents is that the side pieces breaks, which incidentally happend to me the other day.

How to repair broken side pieces?

Heat shrink tube! And as I am doing electronics I always have tube available in several colours. Black seemed to be the choice, but green/yellow (earth) would look nice.

large_repair glasses withy shrinking tube.jpg


2N2222A fuzz, nice for x0xb0x

Well, a simple circuit. One transistor! Almost any transistor will work. In this case, an old transistor was used - the 2N2222A.

The schematics:

medium_2N2222A fuzz_schema.jpg

Video: First without fuzz and then with fuzz. X0xb0x serves as sound source.


Spiderbaby V2 (Arduino version)

A couple of years ago I did a small device grabbing midiclock and making some sort of trig from it. It was realized on a Attiny2313 and done completely in assembler. Assembler is a nice language!

But, time moves on and why not try C?

The MIDI Library was added and some small code was written.

What does the code do?

Well, not much really. It just checks if MIDI-messages such as START, STOP, CONTINUE, CLOCK is sent from a connected device such as a midi sequencer. Seperate handlers take care of what will happen when any of the messages are recieved. The trig-pattern (6 parellell outputs) is easy to expand or adjust. In the code it´s just cycling thru an array of 24 elements (midiclock is 24 ticks per quarternote).

The trig pattern will give you 6 parallell outputs on pin 2 to pin 7 on an Arduino Uno V3, and as mentioned before very easy to change. Connect the outputs to some circuit (maybe LED + resistor) and then to an output jack.

The midiinterface is a simple thing based on 6N138 but any variation will do.

The sketch

large_Spiderbaby V2-2_bb.jpg

If any help is needed, just contact me.

Caution: When uploading the sketch, disconnect the RX. RX is used to upload the sketch and this will fail if connected during uploading.