Blog - All Comments

RE: The IOT Wind Chimes

phoenixcomm — Sat, 04 Feb 2023 01:19:37 GMT

Neet little hack! how about a servo per chime now you could play a little tune.

RE: The IOT Wind Chimes

piyush.varadpande@gmail.com — Fri, 14 Sep 2018 06:24:22 GMT

Nice Idea....

RE: Dum-De-Dum, the Cardboard Drum!

jomoenginer — Wed, 04 Jul 2018 06:06:41 GMT

This is a very cool project and very well implemented. It reminds me of the Nintendo LABO kits. Add a Nintendo Switch interface and you'll have a nice build your own Dum-De-Dum kit.

Thanks for sharing this.

RE: Dum-De-Dum, the Cardboard Drum!

acdd — Fri, 29 Jun 2018 09:15:59 GMT

Nice little project but : no code for Arduino ? no schematics ?

I'm afraid I do not understand the interest ... without this information : thanks for reassuring me :-))

Regards

RE: Dum-De-Dum, the Cardboard Drum!

danzima — Thu, 28 Jun 2018 15:19:42 GMT

Love this! Any time I see a concert I'm always trying to figure out what equipment everyone on stage is using, and I'm pretty sure this would leave me fascinated. And I love the velocity sensitivity, that's so important to making electronic drum parts feel more human and musical.

RE: Dum-De-Dum, the Cardboard Drum!

luislabmo — Tue, 26 Jun 2018 18:20:12 GMT

Nice project Enrico!.

Luis

RE: Dum-De-Dum, the Cardboard Drum!

ntewinkel — Tue, 26 Jun 2018 18:08:22 GMT

That's really cool, Enrico!

Brilliant idea using weight sensors that way [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-7f8670aa-1fa6-4c3f-89f6-05e518dd9b4b/contentimage_5F00_1.png:16:16]

-Nico

RE: Dum-De-Dum, the Cardboard Drum!

mathias_magdowski — Tue, 26 Jun 2018 11:01:35 GMT

What type of pressure sensor have you used? We have recently built a staircase piano and just used a Makey Makey as well as some cardboard, aluminum foil and some foam to create a very cheap pressure-activated contact, see this videos: Campusdate 2018

RE: Tube headphone amplifier

jc2048 — Sun, 17 Jun 2018 10:52:29 GMT

Interesting circuit and a nice project built around it.

I can sort of understand the operation, indirectly, by substituting FETs for the tubes. The top tube is a

follower and the bottom one an active pull-down, driven by feedback from the anode of the top tube via C4 on your schematic (C3 on mine) leading to a low output impedance (for a valve

circuit without a matching transformer).

Couldn't resist trying it in the simulator. Here's a FET version that I've slapped together. (Important: this isn't a

properly designed circuit, so don't build it and expect it to be any good as a headphone amplifier. I might even be operating outside the spec for

the FETs. And, the equation for transconductance of a tube is more complicated than a FET, so the FET isn't quite an analogue of a tube and this

won't behave in quite the same way as the valve version.)

[View:/resized-image/__size/586x464/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-96e7da26-82cd-4fc8-82ee-44834d6dca1f/2630.contentimage_5F00_187567.jpg:586:464]

It does actually work (kind of works), though I can't persuade it to follow properly (so the pull-down might be a bit skewy) - I get a gain of about 0.8. It's

horribly inefficient - I've got a current of 30mA through the FETs and about 5mA peak into the load - but probably not as

inefficient as the tube version which I assume has a secondary use as a small room heater. Looks like there's a moderate

amount of distortion on the output too. All of that could probably be improved with proper design, though it's never going to

be that efficient because of the standing current through the FETs.

[View:/resized-image/__size/620x427/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-96e7da26-82cd-4fc8-82ee-44834d6dca1f/6763.contentimage_5F00_187568.jpg:620:427]

Frequency response is quite reasonable. Flat to 10MHz. Wonder how that compares to the valve version? Presumably the tubes do better because of lower parasitic capacitance.

[View:/resized-image/__size/620x243/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-96e7da26-82cd-4fc8-82ee-44834d6dca1f/2543.contentimage_5F00_187569.jpg:620:243]

RE: Tube headphone amplifier

neilk — Sat, 16 Jun 2018 16:02:23 GMT

Very nice job. [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-96e7da26-82cd-4fc8-82ee-44834d6dca1f/contentimage_5F00_1.png:16:16]

My first foray into electronics, in the early 60s, was to build a valve amplifier from a book of designs, published by the valve manufacturers Mullard. EF86, ECC83 and 2xEL84.

Neil

RE: Dum-De-Dum, the Cardboard Drum!

DAB — Thu, 14 Jun 2018 18:08:59 GMT

Nice post.

I have an old Radio Shack keyboard with a drum set in it.

Now you have me wanting to take it apart to see how they did the drum sensors.

DAB

RE: Dum-De-Dum, the Cardboard Drum!

carmelito — Thu, 14 Jun 2018 16:35:28 GMT

Nice project..I am going to have to try out Hydrogen.

- Carmelito

RE: Dum-De-Dum, the Cardboard Drum!

genebren — Thu, 14 Jun 2018 14:42:54 GMT

Nice little build. Your creativity is very evident in your choice of parts/materials. This is a simple and elegant design.

Gene

RE: Dum-De-Dum, the Cardboard Drum!

fmilburn — Thu, 14 Jun 2018 05:25:38 GMT

Very nice... I look forward to hearing it as well.

RE: Dum-De-Dum, the Cardboard Drum!

jw0752 — Thu, 14 Jun 2018 05:17:29 GMT

Hi Enrico,

Very inventive. I am really curious what it will sound like. I am guessing the pressure sense will control the amplitude and the initial input will trigger the output of a designed waveform to mimic a specific drum.

John