Schematic Design Issue Analysis
1:27
Project
Below are several specific issues observed in your schematic along with recommended corrective actions:
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Airwire/Connectivity Errors:
- Several airwire errors were reported (for example, “C6:2, U3:2”, “U4:4, D2:1”, and “D5:1, D2:1”).
Recommendation: Check the pin–net assignments for these components. Verify that each pad is connected to the intended net; for example, confirm that the GND pin of U3 and pad 2 of C6 are both following a common ground scheme and not isolated by routing or via errors. Similarly, review the connection from U4 pin 4 and the LED D2 to ensure they share a proper, intended voltage node.
- Several airwire errors were reported (for example, “C6:2, U3:2”, “U4:4, D2:1”, and “D5:1, D2:1”).
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Decoupling and Bypass Considerations:
- Although several capacitors are present (for instance, multiple 10 µF or 100 nF devices), it is not clear that every IC power pin has an immediate bypass capacitor.
Recommendation: For sensitive ICs (U1 and U3 in particular), place one decoupling capacitor as close as possible to each power pin (both VIN and VOUT/EN as applicable) to minimize the loop area. Revisit the datasheets to verify that the capacitor type and voltage rating are suitable for the expected supply levels.
- Although several capacitors are present (for instance, multiple 10 µF or 100 nF devices), it is not clear that every IC power pin has an immediate bypass capacitor.
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LED Current Limiting:
- The schematic includes LED devices (D5 and D2) without any obvious series resistor protection. Driving LEDs directly can lead to overcurrent conditions.
Recommendation: Add appropriate current limiting resistors in series with each LED. Calculate the resistor values based on the supply voltage, LED forward voltage, and desired current (typically around 20 mA).
- The schematic includes LED devices (D5 and D2) without any obvious series resistor protection. Driving LEDs directly can lead to overcurrent conditions.
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Net Labeling and Functional Grouping:
- Some nets (for example, the “VIN” net) include mixed function signals such as power enable pins, feedback nodes, and resistor dividers. This can complicate troubleshooting and may risk unintentional connections.
Recommendation: Rename or split nets where appropriate to clearly indicate their function. For instance, separate the voltage-sense (feedback) node from the raw input voltage if they are not meant to be directly connected.
- Some nets (for example, the “VIN” net) include mixed function signals such as power enable pins, feedback nodes, and resistor dividers. This can complicate troubleshooting and may risk unintentional connections.
-
Feedback and Voltage Divider Integrity at the Regulator:
- The divider on the feedback pin of U1 (formed by R3 and R7) needs a careful review. Although the resistor values appear to set a divider, confirm that the ratio is correct for the desired output voltage and matches the regulator’s requirements.
Recommendation: Revisit the regulator’s datasheet to confirm the proper resistor ratio and verify that each connection (including the routing of the divider to ground and the feedback pin) is properly maintained.
- The divider on the feedback pin of U1 (formed by R3 and R7) needs a careful review. Although the resistor values appear to set a divider, confirm that the ratio is correct for the desired output voltage and matches the regulator’s requirements.
-
Miscellaneous Component and Footprint Checks:
- Some components (such as generic resistor and capacitor parts) share footprints that may not exactly reflect their intended electrical ratings in the context of a power management board.
Recommendation: Double-check that every component’s pin assignments and footprint match the manufacturer’s datasheet (especially for integrated circuits like U1 and U3). Ensure that any necessary labeling for signal integrity (such as pull-ups on open-drain outputs) is explicitly added where needed.
- Some components (such as generic resistor and capacitor parts) share footprints that may not exactly reflect their intended electrical ratings in the context of a power management board.
-
Ground and Power Portal Usage:
- Multiple instances of “Power Net Portal” (used for VBAT, VSOLAR, VUSB, etc.) appear. While these objects can simplify schematic connectivity, they also open up the possibility of inadvertently connecting dissimilar power sources or creating an unclear ground reference.
Recommendation: Verify that each power portal is used consistently and belongs only to its intended power domain. Where two different supply types are involved, consider isolating their distribution paths and clearly labeling nets to avoid misconnection.
- Multiple instances of “Power Net Portal” (used for VBAT, VSOLAR, VUSB, etc.) appear. While these objects can simplify schematic connectivity, they also open up the possibility of inadvertently connecting dissimilar power sources or creating an unclear ground reference.
Summary:
- Airwire issues signal that some pins (for example, on [U3], [U4], [D2], and [C6]) are not reliably connected—double-check net assignments and solder-bridge candidates.
- Decoupling needs require you to ensure every IC has a dedicated capacitor placed as near as possible to its power pins.
- LED circuits must incorporate current-limiting resistors.
- Net naming and function separation can help avoid mixing signal roles (especially on the “VIN” net) and improve troubleshooting.
- Feedback divider validation (for [U1]) should be rechecked against the regulator’s application recommendations.
- Component footprint and assignment reviews are necessary to ensure that parts are correctly represented in the design.
- Finally, use of power portal objects must be consistent to avoid cross-connecting separate power domains.
Addressing these specific issues should enhance the circuit’s electrical integrity, aid signal integrity, and meet best practices in schematic design.
Rename power nets
Add LED resistors
Improve decoupling placement
Investigate connectivity errors
304 days
Ready.
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analyze all net ids in my design and all components connected to the net id. and...
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J3
C1
Capacitance
10u F
R9
Resistance
20k Ω
R8
Resistance
2k Ω
R7
Resistance
15k Ω
R6
Resistance
150k Ω
C4
Capacitance
4u7 F
R1
Resistance
3k Ω
IC1
C2
Capacitance
10u F
U4
C3
Capacitance
100n F
L1
Inductance
10u H
D1
C8
Capacitance
68p F
VSOLAR
VUSB
VBAT
J1
+3V3
D4
R4
Resistance
4k7
Ω
D5
Color
Red
VBAT
C10
Capacitance
22u F
ISET
SW1
D2
Color
Green
C9
Capacitance
100n F
J4
+3V3
R3
Resistance
68k Ω
C7
Capacitance
22u F
VBAT
VSOLAR
D3
VUSB
L2
Inductance
2u2 H
C6
Capacitance
100n F
J2
C5
Capacitance
10u F
12_5V
U3
U1
Reviews
- Wirelessly connects nets on schematic. Used to organize schematics and separate functional blocks. To wirelessly connect net portals, give them same designator. #portaljharwinbarrozo43.0M
- 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 #powerjharwinbarrozo11.4M
- 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 #CommonPartsLibraryjharwinbarrozo1.5M
- 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 #CommonPartsLibraryjharwinbarrozo1.5M
- 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 #genericsjharwinbarrozo15.5k
- An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.Terminal
- 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlinkjharwinbarrozo1.2M
- 10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcanjharwinbarrozo1.2M
- Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlinkjharwinbarrozo1.1M
Brave is a versatile and efficient power board that can provide 12v, 5v and 3.3v outputs for various applications. It can be powered by battery or solar panel, and the battery can be recharged by solar energy. It can also be powered by a USB port if needed. This board is ideal for IoT projects that require reliable and stable power supply in different environments.
#IoT #power #management #usb
Properties
Properties describe core aspects of the project.
Pricing & Availability
Distributor | Qty 1 |
|---|---|
Arrow | $0.74–$2.41 |
Digi-Key | $0.72–$2.70 |
LCSC | $1.53–$2.73 |
Mouser | $2.92–$3.61 |
Verical | $0.46–$1.91 |
Assets
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power_manager_board-removebg-previewThumbnail
qrcode.svg
qrcode
flux logo.svg
flux logoDefault
qrcodev2.svg
qrcodev2
power manager board.png
power manager boardControls
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