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here's a plot of the charging profile of U2. What charging phase would it be in ...
nico

nico

@copilot here's a plot of the charging profile of U2. What charging phase would it be in at 3.2V
Image

Image

https://storage.googleapis.com/flux-comment-files/files/commentFileId-09b2f4ef75058b707dfd3db2e7c982f02228902d2962f84d0b2b3f65a62920da.png?GoogleAccessId=graviton-mvp%40appspot.gserviceaccount.com&Expires=4856759834&Signature=acjVFMmkhKN9JXLvxy2NVr2B5PIwYzUcm6tdvnLFVTKNgk3D3rgs6FO9GFMeeYhEx8%2BUoVE%2Bp2s5svHnYN%2F3wrmiDRdatCiu7THAT81JHeFG%2B5%2F%2FJV1gy1bCEMSWuL9tF2kNW%2B6YDLeWLGGT2O2hNrwUoK%2Fa88x1%2BfGRBEiLISVfigNnkKgS77f3e%2BtAy8oHqEPMz8PEyi%2BRvbjmtsm4o8cA2gJIzY5CD7WjbsSjOaZe1Zph7FajMg93XDzDGbbEdUHU3h75KZsv0BWQgkhgzZg3vmc31Qlo%2FxQtF%2FRUyBqP8kbNtW%2BzvMqEKsRGMDj3O6KWNc3FckOl1FrD1bFI9Q%3D%3D
2y

copilot

Based on the charging profile chart provided, at 3.2V the battery would be in the "Constant Current Phase" of charging. This phase comes after the Precharge Phase (which occurs below 3V in this case) and continues until the battery voltage reaches 4.2V, at which point it transitions to the "Constant Voltage Phase."
2y
2
list all ICs and the decoupling capacitors attached to each. Ensure to include a...
nico

nico

@copilot list all ICs and the decoupling capacitors attached to each. Ensure to include all ICs present in the design, including digital ICs, power converters, LDOs, etc. For every IC, clearly state:
  • What power net the decoupling capacitors are attached to. What is the stated voltage of that net.
  • The voltage rating and value of the attached decoupling capacitors.
  • Signal with the expression “[WARNING]” if any of the following conditions are met: no decoupling capacitors are attached; the voltage of the power net is higher than the voltage rating of the capacitor; No voltage range was stated for the capacitor. Give a separate “[WARNING]” for each condition. Signal with the expression “[OK]” if none of those conditions are met
  • Express the result in a markdown-formatted table
2y

copilot

Here's a summary of the ICs in your design and their associated decoupling capacitors:

Table

ICPower NetNet VoltageCap MPNCap ValueCap Voltage RatingNotes
U6 (102010428)+3V3+3.3VGRM188R61A106KE69D10u10V[OK]
U3 (SY6280AAAC)+3V3+3.3VGRM188R61A106KE69D10u10V[OK]
U1 (RT8059GJ5)VBATBattery voltage (assumed less than 5V)GRM188R61A106KE69D10u10V[OK]
U2 (CN3063)VBATBattery voltage (assumed less than 5V)GRM188R71H104KA93D100n50V[OK]
IC1 (MT3608L)VBATBattery voltage (assumed less than 5V)GRM188R60J226MEA0D22u6.3V[WARNING – The voltage of the power net may exceed the voltage rating of the capacitor if the battery voltage goes over 6.3V]
IC2 (SP3481CN-L/TR)+3V3+3.3VGRM188R61A106KE69D10u10V[OK]
I assumed that the voltage of the VBAT net is less than 5V, which is a common range for Li-ion batteries. If the battery voltage exceeds 5V, you may need to replace the decoupling capacitors of U1 and IC1 with capacitors rated for a higher voltage to prevent excessive voltage stresses. Be sure to confirm the maximum and normal operating conditions of your battery and all components connected to the VBAT net. You can correct this assumption if it is not valid for your design.
Capacitor part numbers, values, and voltage ratings are based on the provided components and their datasheets. While U4 (317990687) is an IC in your design, there is no explicit information in the project text regarding its decoupling capacitors.
Remember to locate the decoupling capacitor as close to the supply pin of the IC as appropriate to maximize their effectiveness. In addition, double-check the footprint and package compatibility of your selected capacitors with your PCB layout.
2y
4
Check that all reset/enable have an external pull-up or pull-down resistors. Rep...
nico

nico

@copilot Check that all reset/enable have an external pull-up or pull-down resistors. Report action items in an ordered list.
2y

copilot

The following designators are associated with reset/enable in this project: NRST, ENABLE, U2, and SW1. I'll check each of them for a pull-up or pull-down resistor.
  1. Designator: NRST
    • This net is connected to a reset pin of component U4.
    • According to the schematic, there is a pull-up resistor (R18) connected to NRST. No action is required for NRST.
  2. Designator: ENABLE
    • This net is connected to the control pins DE and RE of the RS485 transceiver IC2.
    • I don't see any pull-up or pull-down resistor connection for the ENABLE net in the schematic provided. Action: Add either a pull-up or pull-down resistor to the ENABLE net depending on the RS485 transceiver IC2 input requirements.
  3. Designator: U2
    • U2 has the pins ~DONE, ~CHARG, and EN which are output, output, and input respectively.
    • The ~DONE pin doesn't need a pull-up or pull-down resistor because it's an output.
    • The ~CHARG pin is also listed as an output, so it doesn't need a pull-up or pull-down resistor.
    • The EN pin is being directly driven from the power supply it doesn't have a pull-up or pull-down resistor. This is okay if this input to the IC is expected to always be the same as the supply voltage, otherwise, action could be needed here.
  4. Designator: SW1
    • It looks like SW1 is an input, with its state determined by associated resistors R1 and R9. R1 could act as a pull-down when SW1 is open, and R9 could act as a pull-up when SW1 is closed. At a glance, it seems like this setup is appropriate for SW1. No action required for SW1.
Please bear in mind that without full knowledge of all project requirements and the behavior of all components used, these recommendations are given based on the best practices and common uses of these components and may not match the intended design. Therefore, it is always advisable to double-check these aspects with a detailed inspection or simulation.
2y
5
C11
Capacitance
4u7 F
R11
Resistance
22 Ω
R18
Resistance
22 Ω
U4
  • Generic Inductor
    Generic Inductor
    A generic fixed inductor suitable for rapid circuit topology development. The footprint automatically adapts based on the selected package, supporting standard SMD sizes (e.g., 0402, 0603, 0805) as well as well-known inductor packages such as SDR1806, PA4320, SRN6028, and SRR1260. Standard inductor values: 1.0 nH, 10 nH, 100 nH, 1.0 µH, 10 µH, 100 µH, 1.0 mH 1.2 nH, 12 nH, 120 nH, 1.2 µH, 12 µH, 120 µH, 1.2 mH 1.5 nH, 15 nH, 150 nH, 1.5 µH, 15 µH, 150 µH, 1.5 mH 1.8 nH, 18 nH, 180 nH, 1.8 µH, 18 µH, 180 µH, 1.8 mH 2.2 nH, 22 nH, 220 nH, 2.2 µH, 22 µH, 220 µH, 2.2 mH 2.7 nH, 27 nH, 270 nH, 2.7 µH, 27 µH, 270 µH, 2.7 mH 3.3 nH, 33 nH, 330 nH, 3.3 µH, 33 µH, 330 µH, 3.3 mH 3.9 nH, 39 nH, 390 nH, 3.9 µH, 39 µH, 390 µH, 3.9 mH 4.7 nH, 47 nH, 470 nH, 4.7 µH, 47 µH, 470 µH, 4.7 mH 5.6 nH, 56 nH, 560 nH, 5.6 µH, 56 µH, 560 µH, 5.6 mH 6.8 nH, 68 nH, 680 nH, 6.8 µH, 68 µH, 680 µH, 6.8 mH 8.2 nH, 82 nH, 820 nH, 8.2 µH, 82 µH, 820 µH, 8.2 mH #generics #CommonPartsLibrary
    jharwinbarrozo
    16.6k
  • Generic Capacitor
    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, 10000uF 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, 220pF, 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
    jharwinbarrozo
    1.5M
  • Generic Resistor
    Generic Resistor
    A generic fixed resistor ideal for rapid circuit topology development. Its footprint automatically adapts based on the selected package case code—supporting 0402, 0603, 0805, 1203, and many other standard SMD packages, as well as axial horizontal and vertical configurations. Save precious design time by seamlessly add more information to this part (value, footprint, etc.) as it becomes available. Standard resistor values: 1.0 ohm, 10 ohm, 100 ohm, 1.0k ohm, 10k ohm, 100k ohm, 1.0M ohm 1.1 ohm, 11 ohm, 110 ohm, 1.1k ohm, 11k ohm, 110k ohm, 1.1M ohm 1.2 ohm, 12 ohm, 120 ohm, 1.2k ohm, 12k ohm, 120k ohm, 1.2M ohm 1.3 ohm, 13 ohm, 130 ohm, 1.3k ohm, 13k ohm, 130k ohm, 1.3M ohm 1.5 ohm, 15 ohm, 150 ohm, 1.5k ohm, 15k ohm, 150k ohm, 1.5M ohm 1.6 ohm, 16 ohm, 160 ohm, 1.6k ohm, 16k ohm, 160k ohm, 1.6M ohm 1.8 ohm, 18 ohm, 180 ohm, 1.8K ohm, 18k ohm, 180k ohm, 1.8M ohm 2.0 ohm, 20 ohm, 200 ohm, 2.0k ohm, 20k ohm, 200k ohm, 2.0M ohm 2.2 ohm, 22 ohm, 220 ohm, 2.2k ohm, 22k ohm, 220k ohm, 2.2M ohm 2.4 ohm, 24 ohm, 240 ohm, 2.4k ohm, 24k ohm, 240k ohm, 2.4M ohm 2.7 ohm, 27 ohm, 270 ohm, 2.7k ohm, 27k ohm, 270k ohm, 2.7M ohm 3.0 ohm, 30 ohm, 300 ohm, 3.0K ohm, 30K ohm, 300K ohm, 3.0M ohm 3.3 ohm, 33 ohm, 330 ohm, 3.3k ohm, 33k ohm, 330k ohm, 3.3M ohm 3.6 ohm, 36 ohm, 360 ohm, 3.6k ohm, 36k ohm, 360k ohm, 3.6M ohm 3.9 ohm, 39 ohm, 390 ohm, 3.9k ohm, 39k ohm, 390k ohm, 3.9M ohm 4.3 ohm, 43 ohm, 430 ohm, 4.3k ohm, 43K ohm, 430K ohm, 4.3M ohm 4.7 ohm, 47 ohm, 470 ohm, 4.7k ohm, 47k ohm, 470k ohm, 4.7M ohm 5.1 ohm, 51 ohm, 510 ohm, 5.1k ohm, 51k ohm, 510k ohm, 5.1M ohm 5.6 ohm, 56 ohm, 560 ohm, 5.6k ohm, 56k ohm, 560k ohm, 5.6M ohm 6.2 ohm, 62 ohm, 620 ohm, 6.2k ohm, 62K ohm, 620K ohm, 6.2M ohm 6.8 ohm, 68 ohm, 680 ohm, 6.8k ohm, 68k ohm, 680k ohm, 6.8M ohm 7.5 ohm, 75 ohm, 750 ohm, 7.5k ohm, 75k ohm, 750k ohm, 7.5M ohm 8.2 ohm, 82 ohm, 820 ohm, 8.2k ohm, 82k ohm, 820k ohm, 8.2M ohm 9.1 ohm, 91 ohm, 910 ohm, 9.1k ohm, 91k ohm, 910k ohm, 9.1M ohm #generics #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Terminal
    Terminal
    An electrical connector acting as reusable interface to a conductor and creating a point where external circuits can be connected.
    natarius
  • RMCF0805JT47K0
    RMCF0805JT47K0
    General Purpose Thick Film Standard Power and High-Power Chip Resistor 47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film Features: - RMCF – standard power ratings - RMCP – high power ratings - Nickel barrier terminations standard - Power derating from 100% at 70ºC to zero at +155ºC - RoHS compliant, REACH compliant, and halogen free - AEC-Q200 compliant
    jharwinbarrozo
    1.2M
  • 875105359001
    875105359001
    10 µF 16 V Aluminum - Polymer Capacitors Radial, Can - SMD 30mOhm 2000 Hrs @ 105°C #commonpartslibrary #capacitor #aluminumpolymer #radialcan
    jharwinbarrozo
    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric)
    jharwinbarrozo
    1.1M
  • 1070TR
    1070TR
    Battery Holder (Open) Coin, 20.0mm 1 Cell SMD (SMT) Tab bate or batt #forLedBlink
    jharwinbarrozo
    700.5k
  • Push Button
    Push Button
    A momentary or non-latching switch which causes a temporary change in the state of an electrical circuit only while the switch is physically actuated. SWITCH TACTILE SPST-NO 0.05A 24V
    jharwinbarrozo
    490.7k
  • XY301V-A-5.0-3P
    XY301V-A-5.0-3P
    Straight 3 pin 5mm 3-pin Pitch 5mm 15A 1.5 300V Screw terminal block 01x03 #screwblock #connector #commonPartsLibrary
    jharwinbarrozo
    537.9k

Block Diagram Review Demo

Block Diagram Review Demo thumbnail
The "Green Dot 2040E5" Board is a Node that interfaces RS485 Sensor probes and can log information to the cloud using LoRa Connectivity. It uses the XIAO RP2040 and the LoRa-E5 (STM32WLE5JC) modules from Seeed Studio to do its magic. It also has amazing power management capabilities (Solar charging, Battery protection, etc) that make it very useful for IoT applications #SeeedStudio #XIAO #LoRa #RP2040 #IoT

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Digi-Key

$16.16–$17.88

LCSC

$29.70–$31.42

Mouser

$19.22–$19.70

Controls