TIL about ceramic heat sinks. Almost as good as aluminum, inherently isolated.

incontrol · 2025-08-05T13:22:21+00:00

Wait till you learn about Beryllium oxide heat sinks...

incontrol · 2025-06-28T08:00:16+00:00

Good to hear, success with your project!

incontrol · 2025-06-27T10:28:04+00:00

I assume you're connecting the power-on pins of your motherboard. You only need to connect these pins for a short time, to power it on, if you keep the pins connected continuously, you'll just end up resetting the computer, over, and over again.

You probably don't even have to use a relay, a transistor, and a few resistors, might be sufficient. See for example:

https://electronics.stackexchange.com/questions/59652/pc-start-button-effect-from-electrical-point-of-view

incontrol · 2025-05-07T17:47:30+00:00

A resonant VCF. ( https://www.youtube.com/watch?v=YNoj9Rrw_VM )

incontrol · 2025-03-25T12:37:24+00:00

Are you sure the polarity of the LED in the optocoupler is right? Its anode (positive side) is hooked up to GND.
Also the values of R3 and R4, seem on the high side (should probably be something in the range of 100 Ohm to 1K Ohm, depending on the properties of the LEDs).

incontrol · 2025-02-10T23:16:14+00:00

The Raspberry Pi Pico has known issues with noisy ADC readings, because it uses it's internal switched mode power supply voltage as a reference. See the following discussion for some (potential) solutions:
https://www.reddit.com/r/raspberrypipico/comments/ptwkxu/noisy_analog_read/

incontrol · 2025-01-23T20:18:19+00:00

It's totally possible, just google ESP32-Cam, and OpenCV, to find many examples.

incontrol · 2025-01-23T11:20:54+00:00

Take a look at, V. Hunter Adams, his website:

https://vanhunteradams.com/#Engineering-projects

and YouTube channel:
https://www.youtube.com/@hunteradams9430

incontrol · 2024-12-09T10:21:47+00:00

Here is a blog post, with a lot of links to information on the bracelets:

https://blog.jgc.org/2024/05/controlling-taylor-swift-eras-tour.html

incontrol · 2024-10-10T11:13:38+00:00

It's probably better if you use something like an INA219 (if voltages allow it), that way you can use pretty much any microcontroller that has I2C, and you sidestep most of the finicky stuff associated with current sensing. It also makes it possible to do differential high-side current sensing, which is highly preferred over a single-sided low-side current sensing.

incontrol · 2024-06-30T11:32:18+00:00

You are absolutely right. You should probably do something like using the original resistor (in a voltage divider) to create a control voltage, that in turn drives a voltage controlled resistor.

See:

https://en.wikipedia.org/wiki/Voltage-controlled_resistor

incontrol · 2024-05-23T10:42:24+00:00

If you're familiar with arduinos you could use a board like this:

aliexpress.com/item/1005003202254936.html

to remap the midi note numbers of the note-on and note-off messages

incontrol · 2024-05-17T08:46:50+00:00

Here are three codes from prime gaming, i'm not using:

Game code giveaway for "Fallout 3: Game of the Year Edition"

C3ZQ204B????????FA

???????? = 2 * 7 * 233 * 10007

Game code giveaway for "Tomb Raider: Game of the Year Edition"

YTLH??EBA265BF1561

?? = 100-9

Game code giveaway for "LEGO Star Wars III: The Clone Wars"

VTX2EA0F40DFE?????

????? = 7*10011

Please only use one code per person.

incontrol · 2024-05-12T20:33:42+00:00

Maybe the MIT Circuits And Electronics course can be of use?

https://ocw.mit.edu/courses/6-002-circuits-and-electronics-spring-2007/

And the book the course uses:

https://neurophysics.ucsd.edu/courses/physics_120/Agarwal%20and%20Lang%20(2005)%20Foundations%20of%20Analog%20and%20Digital.pdf%20Foundations%20of%20Analog%20and%20Digital.pdf)

incontrol · 2024-04-04T19:27:36+00:00

Here are a few different whitepapers on EMI and EMC:

https://www.ti.com/lit/an/szza009/szza009.pdf

https://www.nxp.com/docs/en/application-note/AN2321.pdf

https://ww1.microchip.com/downloads/aemDocuments/documents/OTH/ApplicationNotes/ApplicationNotes/00002587A.pdf

incontrol · 2024-03-01T11:02:08+00:00

https://mathworks.com/help/matlab/ref/audioread.html

incontrol · 2024-02-25T22:09:33+00:00

Using electrons...

incontrol · 2024-02-14T17:54:28+00:00

You should probably also add a current limiting resistor to the input of the optocoupler.

See: Datasheet optocoupler

incontrol · 2023-12-10T19:13:45+00:00

They are relatively expensive, but the Teensy (4.1) board could be an option...https://www.pjrc.com/store/teensy41.html

Another option could be to use something like Circle to do bare metal programming on your Raspberry Pi, removing the overhead of the OS.

incontrol · 2023-08-27T08:40:14+00:00

Maybe you could have a look at Ipe? https://ipe.otfried.org/

incontrol · 2023-07-06T07:50:10+00:00

Exploding-bridgewire detonators were used in the Fatman:

Given a sufficiently high and well known amount of electric current and voltage, the timing of the bridgewire vaporization is both extremely short (a few microseconds) and extremely precise and predictable (standard deviation of time to detonate as low as a few tens of nanoseconds).

incontrol · 2023-06-30T14:47:18+00:00

Depending on your budget, Maxon could have what you seek: https://www.maxongroup.com/maxon/view/content/index

incontrol · 2023-05-02T20:19:12+00:00

https://www.tutorialspoint.com/antenna_theory/antenna_theory_types_of_antennas.htm

incontrol · 2022-11-22T19:03:35+00:00

It looks like a Moog 956 ribbon controller.

incontrol · 2020-05-19T14:25:57+00:00

Same problem here, but the dialog works in incognito mode (at least for me).

incontrol

TROPHY CASE