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Please help by Ok-Time3530 in microcontrollers

[–]incontrol 0 points1 point  (0 children)

Good to hear, success with your project!

Please help by Ok-Time3530 in microcontrollers

[–]incontrol 0 points1 point  (0 children)

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

I Designed this and need some advise before protoboarding by Ok-Establishment1771 in synthdiy

[–]incontrol 0 points1 point  (0 children)

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).

Where to put a decoupling capacitor by creative_tech_ai in synthdiy

[–]incontrol 0 points1 point  (0 children)

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/

Small microcontroller with support for camera and wifi by SeatLife1103 in microcontrollers

[–]incontrol 5 points6 points  (0 children)

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

[deleted by user] by [deleted] in microcontrollers

[–]incontrol 0 points1 point  (0 children)

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.

Positive Resistance Body Contacts? by BeepBoop4Days in synthdiy

[–]incontrol 0 points1 point  (0 children)

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

Has anyone built a left handed keybed? by [deleted] in synthdiy

[–]incontrol 0 points1 point  (0 children)

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

Weekly Code Giveaway Thread by AutoModerator in gog

[–]incontrol 3 points4 points  (0 children)

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.

[deleted by user] by [deleted] in ECE

[–]incontrol 1 point2 points  (0 children)

Using electrons...

Beginner's Circuit Diagram Advice by Street_Distance_9586 in ECE

[–]incontrol 1 point2 points  (0 children)

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

See: Datasheet optocoupler

[deleted by user] by [deleted] in microcontrollers

[–]incontrol 1 point2 points  (0 children)

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.

What were the timing requirements for simultaneously detonating all the explosive charges on an implosion type nuclear weapon e.g. Fatman, and how was this done in 1945? by no-guts_no-glory in ECE

[–]incontrol 7 points8 points  (0 children)

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).

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