randofo

0.7V is the standard forward voltage for silicon diodes, but we are dealing with LEDs which all have different forward voltages depending on their type and color.So...https://www.amazon.com/gp/product/B01CI5P4B4/This LED has a forward voltage of 3V. The forward current is 250mA. Additionally, the voltage of 3 AAA batteries is 4.5V (not 6V).http://ledcalc.com/Using this LED calculator you will see that the circuit requires a 6.8 ohm 1/2 Watt resistor.Relatively speaking, the 10ohm 1/2 Watt resistor that I am using is well above this. Nevertheless, I specify in the materials list to use a resistor appropriate to the LED you are using.

Interesting. I stand mistaken. There is one Polaroid Land Camera with a proprietary flash system. From my research it seems to only be able to easily work with the flash unit that came with it. Here are some instructions for modding the camera to work with a standard flash:https://www.flickr.com/photos/polapix/3192443326/

At high volumes the sound might distort, but otherwise it shouldn't.I made the headphones like this:https://www.instructables.com/id/Jackhammer-Headph...There really isn't electronics hobby stores anywhere these days now that Radioshack fully closed. Electronics stores are much fewer and further between. I largely have to get my supplies online.

Here is an example of it made by someone else:https://www.youtube.com/watch?v=Oi3dmSMpjsU

A friend was using actuators of this brand to make a robotic corporate lobby display with a short travel / fast action, but they were about $200 a piece:https://www.firgelliauto.com/Or you could try shopping for actuators from Ali Express and buy them direct from China. My ballpark guess is it would be $50 -$100 from there.

It is! It is!

Like all mechanical assemblies, they will eventually begin to fail. You could potentially buy an actuator with a longer shelf-life, but it's going to be considerably more money. You could probably burn through quite a few of these before you would match the cost of a fast-action linear actuator. Alternately, you could mess around with solenoids. Personally, I preferred working with the motors to working with spring-return solenoids.I always found them to be loud-ish, but nowhere near as loud as the drum.

To be honest, I no longer have the drum kit, but in the entire time I had it and used it, I never had to replace any of the motors.Nevertheless, let's say it is going twice a second (120 per minute), which would give us about 840 strikes a day. For arguments sake, let us make it an even 900. Then, if it is running for 60 days it needs to make about 54,000 strikes. I would guess to be conservative you would need about 3 - 4 of the motors to swap out over the course of the exhibit. You also probably want to have an extra of all of the electronics as well.

No, but there are some people working on it.http://www.catlabs.info/we-will-make-packfilm

It is showing up for me.

Maybe try holding the shift key down and pressing refresh on the browser to do a hard refresh of the page.

http://www.diystompboxes.com/smfforum/index.php?to...

As a general rules, always go by the schematic... anyhow...It is listed between 33K and 3.3K, so it should be 22K. Thanks for pointing out the typo. In terms of the potentiometer, I don't think it should matter too much. Start with 50K. If that doesn't make you happy, try 100K. There are not many hard rules to this. Here are some potentiometers of different values:https://www.amazon.com/Knurled-Linear-Rotary-Poten...

It depends on the part of the body. For a really strange experience, put it inside a plastic bag and bite down gently upon it.

I would say $40 - $50 if you have to buy all of the materials including the amp.

It feels like slight tingling or vibrating.

Yes. I accidentally deleted it from existence. Please hold while I re-compile everything. Might take a moment.

Actually, I found a copy. I've updated the project with a materials list.

Yes. They are definately one of the go-to problem solving materials. I have been really into aluminum rulers lately. They come measured.

No. Just volume and gain.

I have no idea. Perhaps start by checking to make sure your wiring is correct. Next make sure your solder connections aren't crossing. Also, make sure no parts are heating up. Did you build it on a breadboard first? Did that work?

Looks good! Please come back and share a pic of the board when you have one built.

Ohhhh.... These are nice!I particularly like the candle one.

Nice layout! Please come back and post a picture of the finished board once you have assembled it.

Very cool. Please also share a picture of the assembled board once it is built. :)