STM32 : Internet Of Things with 4G LTE Modem - Hardware

Learn detailed hardware design for embedded systems and IoT using STM32, with internet-connected devices, paced for steady progression and practical support as more lectures upload.

Explore the IoT based system architecture from field devices to cloud computing, detailing hardware and software roles, data flow, and the MQTT protocol.

Explore the course structure and the provided PDF materials, with ongoing lecture uploads covering hardware fundamentals, block diagrams, power-supply design, and 4G LTE modem integration for STM32 IoT projects.

Explore the course materials, including Gerber and drill files, Eagle libraries, schematic and board files, and the bill of materials, as well as the code structure, with future updates.

Download and install Eagle software, explore basic tools for schematics and brd file creation, and learn external library installation and symbol or footprint modification.

Open Eagle software, sign in, and create a schematic with grid settings and libraries; place components, connect nets, label signals, and export to board file.

Install third-party libraries in Eagle using the library manager, and learn to download and integrate Spark Fun libraries or components from component search engine into your projects.

Modify library symbols and footprints in Eagle to fit your design, including setting pin functionality and adding external crystal connections. Update the component in the library according to IPC standards.

Explore hardware fundamentals for STM32-based IoT projects and get a brief introduction to key concepts that lay the groundwork for 4G LTE modem integration.

Outline the stm32-based IoT hardware, detailing the power supply, microcontroller, and 4G LTE modem sections, including 12 v to 5 v regulation and battery charging.

Outline the block diagram for a STM32-based IoT system, covering the power supply, STM32 block, and 4G LTE modem, with battery charging, LDO regulation, SD card interface, and antenna protection.

Explore essential soldering materials and safety for pcb assembly, including flux, isopropyl alcohol cleaning, desilting wick, tweezers, soldering iron, fumes, ventilation, and a quality soldering station.

Explore non essential soldering materials, including ESD mats, gloves, aprons, ESD bands, grounded chairs, and fume extractors, and learn how they protect electronics during testing and troubleshooting in EMS.

Explore stencil techniques for applying solder paste on PCBs, including material choices and stencil thickness. Compare uniform and step stencils, paste density, alignment, and manual versus paste printer workflows.

Explore solder paste basics, stencil handling, and paste types (type 3, 4, 5) with particle sizes, plus leaded vs lead-free pastes, shelf life, and placement timing for reliable reflow.

Explore hot air gun and soldering station basics, including airflow and temperature controls, soldering iron heat, and the role of soldering stone, sponge, and magnet sensor.

Learn the four phases of a reflow profile for hot air soldering—pre-heat, soak, reflow, and cooling—and how zone-based profiles with temperature targets and conveyor speed ensure reliable PCB soldering.

Demonstrate hot air soldering a 1206 capacitor onto a pcb, detailing preheat, temperature ramp, and reflow for lead-free solder. Highlight paste application, component placement, and observing solder joint formation.

Study a time lapse of hardware for STM32-based internet of things with a 4G LTE modem, focusing on hardware concepts and practical integration.

Explore power supply design, including classification into DC power supply and switch-mode power supply, key topologies like buck and boost, architecture, and lab bench power supply usage.

Explore the power supply architecture for STM32 IoT hardware, from 12 V to 5 V and 3.3/3.8 V rails, using switching or linear regulators and a distribution block diagram.

Explore the dual-channel lab bench power supply used in the course, and learn channel a and b settings, coarse and fine voltage control, and current limits.

Explore the fundamentals of the SMPS section, from selecting a simple chassis and understanding assembly data sheets to protection circuits, schematic design, layout, soldering, and testing for reliable embedded hardware.

Explore how to select an SMPS IC by evaluating topology, input and output voltages, output current, variants, switching frequency, efficiency, packaging, price, and future availability for reliable IoT hardware.

Learn to estimate the total current by budgeting SDM32L073, GSM module, and SD card loads, compute output and input power with 80% efficiency, and select a 12 volt adapter.

Navigate Monolithic Power Systems and Texas Instruments portfolios to select step-down converter assemblies by input voltage, output current, and frequency, and understand soft-start, power-good, and synchronous rectification features.

Learn to select an smps ic from Mouser Electronics by using filters for in-stock, active, compliant, and new products, then narrow by manufacturer, topology, voltage, outputs, packaging, and verify datasheet.

Learn how to read SMPS IC datasheets, focusing on front-page specs, features, and typical applications, and interpret absolute maximum ratings and operating conditions for informed device selection in IoT hardware.

Explore the SMPS IC pin configuration and block diagram, then examine internal blocks, enable and compensation circuits, feedback, bootstrapping, and how the online designer tool helps configure outputs.

Describe the SMPS IC circuit part 2, focusing on input capacitor selection (10 µF and 0.1 µF) to suppress ripple and ensure proper voltage rating and ripple current.

Explain the enable pin behavior of the SMPS IC, focusing on positive logic, rising and falling thresholds, resistor divider design with R5 and R6, and resulting current and power considerations.

Explain how the compensation pin and RC network stabilize the SMPS using R3 and C3 values, and guide selecting capacitors, inductors, bootstrap capacitor, and feedback resistors to set the output.

Compare Schottky and general-purpose diodes for SMPS, noting fast switching, threshold, and reverse voltage. Learn to size inductors and output capacitors, and understand synchronous versus non-synchronous boost converters.

Explore using the dc-dc designer online tool to design a 12 v input, 5 v output, 3 a smps at 900 khz with a 5.6 uH inductor and voltage lockout.

Learn practical component selection for SMPS IC circuits, focusing on capacitors, resistors, and inductors, dielectric choices (X5R, X7R, X8R), tolerances, voltage ratings, and self-resonant frequency.

Learn how to select SMPS components for a STM32 IoT hardware project, including inductors and diodes, using self-resonant frequency, quality factor, shielding, current ratings, and cost considerations.

Create the smps schematic using a two-sheet design for power supply and logic, importing libraries, placing components, setting values and designators, and ensuring neat nets and proper grid alignment.

this lecture introduces protection circuits for power supplies, covering reverse polarity, transient voltage, fuse protection, and underworld feature, with MOSFET-based solutions and a practical demonstration.

Demonstrates how a short good diode and a general purpose silicon diode provide reverse polarity protection, using a ceramic dummy load to compare voltage drops and current.

Explore how transient voltage suppressors protect power supplies from spikes. Learn how breakdown voltage, stand-off voltage, leakage current, and maximum clamping voltage guide TVS diode selection from datasheets.

Demonstrate a power supply protection circuit using a diode, showing stand-off, breakdown and clamping voltages, current behavior, and how a fuse guards against short circuits and transients.

Learn how to select a tvs diode for power-supply protection, covering channel count, breakdown and clamping voltages, peak current, packaging, and how to assess protection for a single-line system.

Explore protection with fuses in power supply circuits, focusing on polymeric PTC fuses, how they recover after overcurrent, and key selection parameters: voltage rating, holding current, and trip current.

Explore a practical protection circuit for a power supply using a fuse, various loads, and ohms law to analyze current, voltage, and fuse triggering under transient conditions.

Explore a protection circuit for power supplies, using a TVS diode and fuse to clamp transients, divert surges to ground, and safeguard the system.

discover how to select a dc fuse for a 12-volt power supply by calculating input current and choosing a slightly higher rating, considering voltage, hold, trip currents, and resistance.

Design a protection circuit schematic for the STM32 IoT hardware course, integrating fuses, a TVS diode, and reverse polarity protection, and organize the power supply and protection blocks in the layout.

Plan the smps and gsm layout by fixing mounting holes and enclosure alignment, apply ergonomics, and place rf sections at the pcb edge to safeguard antenna performance.

Learn to choose the right PCB layer stack-up for STM32 IoT hardware, comparing two-layer and four-layer boards, copper thickness, dielectrics, and high-speed interfaces like USB, Ethernet, and SD card.

Master smps layout guidelines to minimize switch node loop area, place input capacitors and feedback components near the ic, and improve thermal performance.

Apply unbiased layout guidelines to design a neat SMPS assembly with isolation planes, ground planes, heat distribution, and ERC checks for robust IoT hardware.

Master step-by-step soldering of an IoT PCB using hot air and tweezers; verify pin 1 orientation, handle diodes and TVS polarity, attach a DC jack, and clean with isopropanol.

Follow step-by-step troubleshooting strategies for different scenarios, from output fluctuation to zero or short circuits, by checking compensation components, layout, input and output capacitors, and power integrity.

Design a lithium ion battery charger hardware using a development board, covering charger selection, protection, AC socket design, schematics, layout, testing, and practical design pitfalls.

Explore the key specs of a lithium ion 18650 battery, including voltage limits (max 4.2 v, nominal 3.7–3.8 v, min), capacity 2600 mAh, and protections (ovp, uvp, ocz, OCD).

Learn to select a li-ion battery charger ic by evaluating input/output voltage and current, switching vs linear, programmable vs standalone, dynamic power management, protection features, and integrated boost options.

Estimate charger current from output power and efficiency. Select a Li-ion battery with appropriate capacity and a 2C C-rating to meet the required current from 4.2 V down to 2.5 V.

Explore selecting a single-cell li-ion battery charger IC by filtering for switching chargers, standalone operation, 3 A charging, and 4.2 V cell voltage, then verify datasheet features.

Navigate Mouser.com to filter lithium ion battery chargers with 5 v output, then compare Texas Instruments and monolithic power system offerings and review datasheets for key parameters.

Explore the lithium ion battery charger IC through its block diagram, pin configuration, and operation, covering current sensing, synchronous topology, boost and sleep modes, and programmable charging voltages.

Understand how a lithium-ion charger IC operates in trickle, constant current, and constant voltage modes. See how power-on reset, enable pin, and voltage thresholds steer charging, boost, and sleep states.

Explore the li-ion battery charger ic circuit, focusing on the ac socket diagram and each pin function, including enable, mode, vb, and frequency.

Learn how the Li-ion charger IC uses the BWI power-in pin and 0.8 V and 1.2 V thresholds to switch between pass-through, charging, boost, and dynamic power management.

Learn how to configure a Li-ion charger IC: set input current with Eileen, set charging current with iSEC, and implement NTC temperature monitoring with AC protection.

Understand how to select the inductor value and output capacitor for a Li-ion battery charger IC, using 2.2 µH, 22 µF, and 0.1 µF for buck and boost operation.

Explore how to set the Li-ion charger IC output voltage with R1 and R2 and registers, and select output capacitors to manage ripple current, ESR, and dielectric choices.

Selects discrete components for a lithium ion battery charger circuit, including resistor, capacitor, inductor, lcd, and a usb type-c connector for a 5 v 3 a charger.

Design a Li-ion battery charger schematic using USB Type-C input, resistor-capacitor networks, and charge regulation, including layout notes and MCU interface considerations.

Explore how a lithium ion battery protection IC guards cells and loads with dual MOSFETs, providing overvoltage, undervoltage, short circuit, and overcurrent protection for safe charging scenarios.

Learn how to select a one-cell lithium-ion battery protection IC from Texas Instruments, evaluating features like overcurrent, short circuit, temperature protection, and the BQ29737 with a 4.25 V threshold.

Explore the lithium ion battery protection ic circuit, covering OVP, UVB, CC, CBD, and ACP, and how two mosfets protect against overcharge and over-discharge.

Integrate lithium ion battery protection circuitry with a battery charger, discharge the MOSFET gate via 5.1 meg resistors, monitor voltage for current limiting, and connect GST and BQ29700 components.

Explore the difference between regulators and linear regulators and learn to select and implement a low dropout regulator (LDO) for STM32 IoT hardware with a 4G LTE modem.

Learn how to select an LDO regulator for STM32-based IoT hardware, focusing on input voltage range, output voltage of 3.3 V, dropout, quiescent current, PSR, and noise.

Explore ultra low dropout regulators across STMicroelectronics and Texas Instruments portfolios, using current, dropout voltage, noise, and PSSR to select a suitable LDO for RF, ADC, and microcontroller applications.

Navigate an online distributor to select an LDO regulator, filtering by output voltage, current, and package, then verify dropout and datasheet for a 3.3 V, 300 mA application.

Explore a fixed low-dropout regulator (LDO) and how dropout varies with load, PSR of 68 dB, and stability with 0.1 microfibre input and output capacitors in simple application circuits.

Design and layout of a low-dropout regulator schematic, detailing input and output decoupling capacitors, EMI considerations, and component placement for noise reduction.

Layout design of ldo ic focuses on placing input and output capacitors close to the regulator and routing traces with calculated widths for current, while maintaining a continuous ground plane.

Master practical soldering tips for a radio package, identify pin 1 by the notch, place 0.1 μF input caps and larger output caps, then clean with isopropyl alcohol and flux.

Demonstrate a simple 3.3 volt output circuit, tune for stable 3.3 V, observe minimal output noise, and troubleshoot enable pin, power supply, and possible short circuits.