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U1
what is c8 connected to?

@copilot what is c8 connected to?
1y
The component C8 with designator prefix 'C' is connected to the following:
  • Connected to +5V power net at pin 1
  • Connected to Ground net (GND) at pin 2
Listed in the format:
  • Connect C8:1 to +5V:P1
  • Connect C8:2 to GND:P1
1y
recommend a replacement for L1.

@copilot recommend a replacement for L1.
1y
I see that L1 is an inductor in your design with an inductance of 2.2uH and packaged in SMD_1206_3216Metric. I'm not able to recommend a specific make and part number, but a good replacement would need to match or exceed these key parameters:
  • Inductance: 2.2 µH
  • Package/Case: SMD_1206_3216Metric
  • Type: Surface Mount
It will also be important to consider other parameters to make sure it fits in with your circuit's requirements, such as:
  • Current rating: You need to make sure it can handle the electrical current in your circuit.
  • Resistance (DCR): Lower values will generally result in better efficiency.
  • Frequency range: It should work within your circuit's operating frequency.
Please note that different manufacturers might have a different naming convention for this package size, some might name it as SMD_1206, others as Metric_3216.
I would recommend checking major electronic component suppliers like Digikey, Mouser or RS Components to check for inductors that match these dimensions and parameters.
1y
@copilot can I use a 1uH or 4.5 uh inductor here
1y
The inductor L1 is part of your circuit with an inductance of 2.2 µH. Swapping it with a 1 µH or 4.5 µH inductor will change the inductance value, and therefore the operation of your circuit.
If L1 is a part of a power supply circuit, filter circuit, or an oscillator, its value is critical for the performance and stability of these designs. For filters, the inductor value along with the capacitor values determine the cutoff frequencies. In the case of power supplies like Buck or Boost converters, the value of the inductor can affect the ripple current, efficiency, and stability.
Therefore, using a 1 µH or 4.5 µH inductor instead of 2.2 µH could significantly change your circuit's characteristics. You should perform a circuit analysis or simulation first to understand the effect of these changes.
I would recommend sticking with the 2.2µH inductor value unless your revised analysis shows that a different inductor value is acceptable for your circuit performance and stability. If you need to use a 1 µH or 4.5 µH inductor due to availability, make sure to verify its suitability in your particular design.
1y
9
Would this connection worck where the resistor is after the led not before

@copilot Would this connection worck where the resistor is after the led not before
1y
Yes, placing the resistor after the LED instead of before it can work in a circuit. The purpose of the resistor in an LED circuit, regardless of being placed before or after the LED, is to limit the current through the LED to prevent it from burning out due to excessive current. The direction of current flow through the LED and the resistor doesn't change the fact that the resistor limits the current.
Here's a typical LED circuit connection for context, assuming we're dealing with designators from your project:
  • If we're considering the LED designated as IO1-LED1 and a resistor, say R1 (assuming R1 is the resistor in question), whether R1 is connected to the Anode (A) or Cathode (K) side of IO1-LED1 does not change the fundamental operation of limiting current to the LED. The important part is that they are in series.
For IO1-LED1 where:
  • IO1-LED1:A goes to the +V (could be 3V3 for a 3.3V LED circuit).
  • IO1-LED1:K connects to R1:P1 or R1:P2 (Whichever pin to accommodate the series connection logic).
Then for resistor placement after the LED:
  • Connect IO1-LED1:K to R1:P1 (assuming P1 is the input side of the resistor).
  • Connect R1:P2 to GND.
This assumes:
  • The supply voltage (3V3) is appropriate for your LED and resistor combination. The resistor value should be chosen based on the LED's forward voltage and desired forward current.
  • 3V3 represents a +3.3V power net in your project, which is typical for logic circuits but should be confirmed as suitable for your LED.
Adjust the resistor value as necessary to limit the current according to the LED's specifications. The LED's forward voltage ((V_f)) and desired current ((I_f)) help in calculating the resistor value using Ohm's law ((R = \frac{V_{supply} - V_f}{I_f})). Always double-check the LED and resistor specifications to ensure proper operation and safety.
1y
14
2 - DC Motor 2
IO48
Motor 1
UART_TXD0
IO14
IO48
IO11
PWR-Vmotor
IO11
IO0
IO13
H3
ESP_EN
MD2
End of Life
TDO
C3
Capacitance
0.1u F
Motor 2
R1
Resistance
100k Ω
IO47
J7
IO18
IO9
R10
Resistance
10k Ω
IO37
IO0
TCK
IO13
C7
Capacitance
0.1u F
+5V
IO15
IO9
IO17
J6
IO7
IO2
H1
IO21
UART_TXD0
IO45
UART_RXD0
L1
Inductance
2.2u H
C8
Capacitance
22u F
IO8
USB_D+
BZ1
H4
MD1
End of Life
IO46
TCK
IO8
TMS
3V3
IO35
IO16
M1
IO10
IO3
IO38
IO16
C9
Capacitance
0.1u F
C5
Capacitance
10u F
IC1
IO2
IO3
2-PWR-gnd
R8
Resistance
1K Ω
2-PWR-Vmotor
IO17
IO37
TDI
IO4
TMS
H2
USB_D-
IO12
M2
2 - DC Motor 1
IO36
R12
Resistance
0.001 Ω
IO14
TDI
R13
Resistance
1k Ω
DC Motor
IO10
USB_D-
IO36
IO47
DC Motor 1
IO35
IO38
UART_RXD0
IO21
C1
Capacitance
0.1u F
PWR- Gnd
IO1
IO5
IO45
IO12
IO46
IO1
C2
Capacitance
10u F
USB_D+
IO18
C10
Capacitance
22u F
TDO
U2


  • Ground
    A common return path for electric current. Commonly known as ground.
  • Net Portal
    Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portal
  • Power Net Portal
    Wirelessly connects power nets on schematic. Identical to the net portal, but with a power symbol. Used to organize schematics and separate functional blocks. To wirelessly connect power net portals, give them the same designator. #portal #power
  • Generic Resistor
    A generic fixed resistor for rapid developing circuit topology. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0Ω 10Ω 100Ω 1.0kΩ 10kΩ 100kΩ 1.0MΩ 1.1Ω 11Ω 110Ω 1.1kΩ 11kΩ 110kΩ 1.1MΩ 1.2Ω 12Ω 120Ω 1.2kΩ 12kΩ 120kΩ 1.2MΩ 1.3Ω 13Ω 130Ω 1.3kΩ 13kΩ 130kΩ 1.3MΩ 1.5Ω 15Ω 150Ω 1.5kΩ 15kΩ 150kΩ 1.5MΩ 1.6Ω 16Ω 160Ω 1.6kΩ 16kΩ 160kΩ 1.6MΩ 1.8Ω 18Ω 180Ω 1.8KΩ 18kΩ 180kΩ 1.8MΩ 2.0Ω 20Ω 200Ω 2.0kΩ 20kΩ 200kΩ 2.0MΩ 2.2Ω 22Ω 220Ω 2.2kΩ 22kΩ 220kΩ 2.2MΩ 2.4Ω 24Ω 240Ω 2.4kΩ 24kΩ 240kΩ 2.4MΩ 2.7Ω 27Ω 270Ω 2.7kΩ 27kΩ 270kΩ 2.7MΩ 3.0Ω 30Ω 300Ω 3.0KΩ 30KΩ 300KΩ 3.0MΩ 3.3Ω 33Ω 330Ω 3.3kΩ 33kΩ 330kΩ 3.3MΩ 3.6Ω 36Ω 360Ω 3.6kΩ 36kΩ 360kΩ 3.6MΩ 3.9Ω 39Ω 390Ω 3.9kΩ 39kΩ 390kΩ 3.9MΩ 4.3Ω 43Ω 430Ω 4.3kΩ 43KΩ 430KΩ 4.3MΩ 4.7Ω 47Ω 470Ω 4.7kΩ 47kΩ 470kΩ 4.7MΩ 5.1Ω 51Ω 510Ω 5.1kΩ 51kΩ 510kΩ 5.1MΩ 5.6Ω 56Ω 560Ω 5.6kΩ 56kΩ 560kΩ 5.6MΩ 6.2Ω 62Ω 620Ω 6.2kΩ 62KΩ 620KΩ 6.2MΩ 6.8Ω 68Ω 680Ω 6.8kΩ 68kΩ 680kΩ 6.8MΩ 7.5Ω 75Ω 750Ω 7.5kΩ 75kΩ 750kΩ 7.5MΩ 8.2Ω 82Ω 820Ω 8.2kΩ 82kΩ 820kΩ 8.2MΩ 9.1Ω 91Ω 910Ω 9.1kΩ 91kΩ 910kΩ 9.1MΩ #generics #CommonPartsLibrary
  • Generic Capacitor
    A generic fixed capacitor ideal for rapid circuit topology development. You can choose between polarized and non-polarized types, its symbol and the footprint will automatically adapt based on your selection. Supported options include standard SMD sizes for ceramic capacitors (e.g., 0402, 0603, 0805), SMD sizes for aluminum electrolytic capacitors, and through-hole footprints for polarized capacitors. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard capacitor values: 1.0pF 10pF 100pF 1000pF 0.01uF 0.1uF 1.0uF 10uF 100uF 1000uF 10,000uF 1.1pF 11pF 110pF 1100pF 1.2pF 12pF 120pF 1200pF 1.3pF 13pF 130pF 1300pF 1.5pF 15pF 150pF 1500pF 0.015uF 0.15uF 1.5uF 15uF 150uF 1500uF 1.6pF 16pF 160pF 1600pF 1.8pF 18pF 180pF 1800pF 2.0pF 20pF 200pF 2000pF 2.2pF 22pF 20pF 2200pF 0.022uF 0.22uF 2.2uF 22uF 220uF 2200uF 2.4pF 24pF 240pF 2400pF 2.7pF 27pF 270pF 2700pF 3.0pF 30pF 300pF 3000pF 3.3pF 33pF 330pF 3300pF 0.033uF 0.33uF 3.3uF 33uF 330uF 3300uF 3.6pF 36pF 360pF 3600pF 3.9pF 39pF 390pF 3900pF 4.3pF 43pF 430pF 4300pF 4.7pF 47pF 470pF 4700pF 0.047uF 0.47uF 4.7uF 47uF 470uF 4700uF 5.1pF 51pF 510pF 5100pF 5.6pF 56pF 560pF 5600pF 6.2pF 62pF 620pF 6200pF 6.8pF 68pF 680pF 6800pF 0.068uF 0.68uF 6.8uF 68uF 680uF 6800uF 7.5pF 75pF 750pF 7500pF 8.2pF 82pF 820pF 8200pF 9.1pF 91pF 910pF 9100pF #generics #CommonPartsLibrary
  • Generic Inductor
    A generic fixed inductor for rapid developing circuit topology. *You can now change the footprint and 3D model at the top level anytime you want. This is the power of #generics
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
  • RMCF0805JT47K0
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
  • 875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
  • CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink

Inspect

Real CDR working

Real CDR working
Description

Created
Last updated by team9
1 Contributor(s)
team9

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Availability & Pricing

DistributorQty 1
Digi-Key$14.62–$16.93
LCSC$30.16–$30.19
Mouser$17.99

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