DevHeads IoT Integration Server
The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.
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DevHeads IoT Integration Server
The DevHeads IoT Integration Server accelerates technology engineering by helping pro devs learn, share and collaborate.
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PCB Design review. How did I do?
Very new to designing a PCB and want to see how well I've done. This is a Mini PCI-e card that is a mixture of the CANable USB module but in a PCI-e form for the development board I'm working with, but I've also added connections for a Beitian be-880 GPS module.
Troubleshooting Frequency Dropout Issues in Instrument with Photodetector
Hello, I am working with a instrument where we frequently get the problem of frequency drop out, i.e. suddenly frequency signal goes missing i.e. goes to zero, this cause the loss in data as shown in the below image. Yellow is received frequency signal from Photodetector and Purple is the demodulated data (our desire output). When frequency goes zero the purple line is constant so data is lost.
Can you help me find a solution for this problem!...
Connecting 12V WS2815 LEDs to Arduino Nano: Do I Need Any Precautions to Ensure Safe Operation?
Hi everyone, I am building a light cube using WS2815 individually addressable LEDs, which are powered at 12V. There are almost 700 LEDs in total but only max 50 will light up simultaneously. Using an Arduino Nano to drive the strips, with wiring diagram as shown here.
As shown in the diagram, I am using a power supply that gives both 5V and 12V. I am connecting the GND of the B channels on the LED strips to GND. I think I should also connect the GND from the 5V and 12V power supplies to make sure they have the same reference voltage.
My question: do I need to add any precautions anywhere to avoid my Arduino from getting fried or the LED strips from working as intended ?...
Solution:
I suggest based on the diagram that you can add a current limiting resistor to reduce the amount of current going to the nano chip so it won't be very much.
Then try to calculate the total power that is required to turn on all the led. It seems the total current needed is insufficient to power the 70 led. I suggest you increase the current of the D-60A power supply little bit further....
How to Interface a 4-Wire Vacuum Suction Motor from a Vacuum Robot with a Raspberry Pi?
This is a vacuum suction motor from vacuum robot that am trying to interface with Raspberry Pi. It has 4 wires and am not able to get it working. Any suggestions on wiring
Check Out My New Mini MIDI Controller Prototype – Any Tips on Design or Control Ideas?
My latest WIP, the "World's Second Smallest MIDI Controller" (I think). It's a bit bigger than the first iteration https://www.youtube.com/watch?v=5Ws_JfCw5NY in order to accommodate a potentiometer and larger buttons, as well as a CR2032 battery instead of a CR2016. I also added an ICSP header pinout with the extra room, which is an absolute treat to flash versus using a chip clip, at least in my initial LED flashing test. Also used some better solder paste and possibly heated it to a better temperature and things seemed to melt into place MUCH better.
Cool making a 2nd prototype of something and getting to correct some of your errors! If any of you are musically inclined (or even if you're not) any suggestions on how to actually use it controls-wise? I have some ideas, but good to get other perspectives!...
Should I Connect the 120Ω Resistor on UART-to-RS485 Converter for 2-Module Communication?
Hello,
Got a uart-to-rs485 converter board from the AliExpress .
Its schematic is very close to this one...
Solution:
I would say you should not short it. Leave it open as it is in the schematics diagram. If it's a Uart line then it shouldn't have an issue. But I would say you should check the datasheet and confirm what the manufacturer said about this.
Feedback on MIDI-to-Arduino Adapter Circuit Before Testing?
Working on a MIDI-to-Arduino et al adapter. Not the hardest circuit in the world, and easy enough to breadboard, but might be useful for some. Any comments so far? Guess I should breadboard it and test it out.
Is it possible to use this MAX30102 heart rate sensor to detect a heart attack?
Hi there, right now I am planning to make a device which can detect a heart attack by using MAX30102
After a small research, I found out that a heart attack may be caused by a sudden increase in heart rates or the SpO2 level (the amount of oxygen that your blood is carrying) is lower than 90%.
So my question is: Is it possible to use this MAX30102 heart rate sensor to detect a heart attack?...
Solution:
The MAX30102 sensor is great for measuring heart rate and SpO2, but using it to detect a heart attack isn’t straightforward. Heart attacks involve more than just changes in heart rate or oxygen levels, so relying on this sensor alone wouldn't be enough for accurate detection.
But I think that AI can help because it can analyze heart rate and SpO2 patterns over time to spot anything unusual. But to reliably detect a heart attack, you'd need more data, like ECG readings or other health metrics....
