user-1: I am new to arduino and need help with a couple projects I am working on. One involves the use of 2 sensors - one pulse sensor, and one vibration sensor. Both need to be plugged into the "5v" pin but there seems to be only one. Is there a way I could split the pins to add multiple sensors? Will data be taken in simultaneously, and be cross compared with each other for code execution? I dont want to use breadboaard and want to wire directly to chip.
Also, I need to wire up a rechargeable lithium battery to both projects, I have a 3.7v 1000 Mah lithium battery and a charging port, but do I need more? Ive seen battery regulators, and other parts people recommend, but I want to make sure it will work with just those 2 parts.
I also need to wire a multicolor LED to the board, but do I need any resistors? I see them often for others people projects, but I do not have any and am wondering if I need them.
Thanks if you can answer any of these questions. Totally new to EE

user67703: For the 5v pin:
If you wire 2 sensors to the 5v pin, it will not effect sensor readings of either sensors, and should return separate sensor values regardless of whether or not they are both wired to the 5v pin.
In order to wire both sensors to 1 5v pin, without involving a breadboard you have 2 options:

wire both sensor pins, and the 5v pin onto a custom pin header PCB that connects 3 or more pin headers together
Strip 3 jumper wires and solder them together (2 for the sensors and 1 for the 5v pin)

For the lithium batteries:
It says on their website: that the operating voltage is 5v, So your battery voltage needs to be at least that. It might be a good idea to get 2
(store.arduino.cc)
For the LEDs:
If it is a standard LED, it should be able to withstand voltages of 3.3v or under. Thus the resistor is only absolutely essential for higher voltages. However, it is recommended to use a resistor even with voltages of 3.3v or below, because low resistance could shorten the lifespan of the LED

-1: <p>I am new to arduino and need help with a couple projects I am working on. One involves the use of 2 sensors - one pulse sensor, and one vibration sensor. Both need to be plugged into the &quot;5v&quot; pin but there seems to be only one. Is there a way I could split the pins to add multiple sensors? Will data be taken in simultaneously, and be cross compared with each other for code execution? I dont want to use breadboaard and want to wire directly to chip.</p>
<p>Also, I need to wire up a rechargeable lithium battery to both projects, I have a 3.7v 1000 Mah lithium battery and a charging port, but do I need more? Ive seen battery regulators, and other parts people recommend, but I want to make sure it will work with just those 2 parts.</p>
<p>I also need to wire a multicolor LED to the board, but do I need any resistors? I see them often for others people projects, but I do not have any and am wondering if I need them.</p>
<p>Thanks if you can answer any of these questions. Totally new to EE</p>
 67703: <p><strong>For the 5v pin:</strong>
If you wire 2 sensors to the 5v pin, it will not effect sensor readings of either sensors, and should return separate sensor values regardless of whether or not they are both wired to the 5v pin.</p>
<p>In order to wire both sensors to 1 5v pin, without involving a breadboard you have 2 options:</p>
<ol>
<li>wire both sensor pins, and the 5v pin onto a custom pin header PCB that connects 3 or more pin headers together</li>
<li>Strip 3 jumper wires and solder them together (2 for the sensors and 1 for the 5v pin)</li>
</ol>
<p><strong>For the lithium batteries:</strong>
It says on their website: that the operating voltage is 5v, So your battery voltage needs to be at least that. It might be a good idea to get 2
<a href="https://store.arduino.cc/usa/arduino-nano#:%7E:text=The%20Arduino%20Nano%20is%20a,instead%20of%20a%20standard%20one." rel="nofollow noreferrer">(store.arduino.cc)</a></p>
<p><strong>For the LEDs:</strong>
If it is a standard LED, it should be able to withstand voltages of 3.3v or under. Thus the resistor is only absolutely essential for higher voltages. However, it is recommended to use a resistor even with voltages of 3.3v or below, because low resistance could shorten the lifespan of the LED</p>
