PIC16F877A-based load-cell measurement system using an HX711 24-bit ADC, 4 MHz crystal clock, load-cell connector, ICSP programming header, regulated 5V input, and low-noise PCB layout for internship deliverables.

Universal 12V ESP32 Automation Motherboard with MOSFET Outputs, A4988 Stepper Socket, LM2596 5V Regulator & Expansion Headers

USB-C powered ESP32 WiFi water flow meter schematic with protected 5V input, 3.3V LDO, 12V boost supply for an external RS485 ultrasonic sensor, UART programming header, boot/reset network, and three status LEDs for power, WiFi, and flow activity.

Conservative first-revision TIMI prototype built around ESP32-S3-WROOM-1-N16R8 with USB-C 5V input, native USB, 3.3V regulation, onboard MAX98357A audio out, external INMP441 header, status LEDs, buttons, UART debug header, required test points, and 4-layer antenna-conscious PCB constraints.

SmartDeskPet v1.0 Shield Stage 1 status: - Goal: 5V input -> dual AMS1117-3.3 rails (+3V3_MCU and +3V3_WIFI) with common GND. - Note: Keep power nets explicitly named (avoid unnamed nets) to keep ERC happy. Stage 1 completion checklist: - Mark J1 Pin_1 (+5V) as a Power Output pin to satisfy ERC power-driver checks. - Verify all GND symbols/returns are on the same GND net. - Keep +5V_SERVO isolated from the main +5V net (only share GND). Stage 2 preparation notes (MPN/LCSC + layout constraints): - MPN/LCSC targets to define before Stage 2 exit: - AMS1117-3.3 (SOT-223): set exact MPN and (optionally) LCSC PN for both U1 and U2. - 100nF capacitor (0603): set MPN/LCSC for all 0603 100nF decouplers. - 4.7k resistor (0603): set MPN/LCSC for I2C pull-ups R1 and R2. - 1000uF bulk capacitor (radial): set MPN/LCSC for C7 (CP_Radial_D10.0mm_P5.00mm). - DC005 power jack/regulator input: select exact DC005 footprint + MPN/LCSC (if used). - 2.54mm headers/sockets: set MPN/LCSC for H1, H2, J1, J3, J4, J5, P3, P4, P5, and J2. - ESP-01S antenna keepout: - Reserve a copper keepout under and in front of the ESP-01S onboard antenna. - No copper pours/traces/components in the antenna region (top and bottom) per module guidelines. - H1/H2 header spacing: - Maintain 1000 mil spacing between H1 and H2 header centerlines (shield mechanical requirement). - Silkscreen placeholders: - Add silkscreen labels for: 5V IN, GND, +3V3_MCU, +3V3_WIFI, SERVO1, SERVO2, I2C SDA/SCL, DHT11, ASRPRO UART2, ESP-01S UART3. - Add placeholder text for: MPN, LCSC, board revision, and date code. Stage 3 layout constraints (placement and routing guidance): - Connector placement strategy: - Place H1 and H2 first to lock the shield mechanical interface; enforce 1000 mil spacing. - Place J1 and any DC005 input at the board edge for easy access. - Designated power area planning: - Group U1, U2, and C7 near the 5V entry point; keep high-current 5V and regulator loops short. - Use wide copper for +5V and any servo supply; stitch GND around power section. - Antenna keepout boundaries: - Place J2 (ESP-01S socket) at a board edge with the antenna facing outward. - Enforce a top-and-bottom copper keepout in the antenna region; keep noisy power traces away.

Elementos necesarios en Proteus 8 Busca estos componentes en la biblioteca (modo "Pick Devices"): Conector J1772 – usa un conector genérico de 4 pines (como HEADER 4 o un DB9 si necesitas algo similar). Resistencias: R1: 150 Ω R2: 330 Ω R3: 150 Ω R4: 2.7 Ω Interruptor SPST o jumper simulando "Punto A", "Punto B" y "GND". Fuente de alimentación de 5V para simular BAT1. Ground (GND) para las conexiones a tierra. Batería (Battery) de 5V (puede ser una batería o una carga equivalente en Proteus). Indicador LED (opcional) si quieres ver visualmente la salida de carga o conexión. 🛠️ Pasos para construir el circuito Sección del conector (lado izquierdo) Coloca un conector de 4 pines y nómbralo "J1772". Conecta el primer pin a una fuente de 5V opcional (simulando señal de control). Añade las resistencias R1 (150Ω) y R2 (330Ω) en serie, con un nodo medio hacia “Punto A”. Conecta el otro lado de R1 a "Punto B". Conecta el otro extremo de R2 a tierra. Agrega interruptores SPST para "Punto A", "Punto B" y "GND" para simular las uniones cuando se conectan al cargador. Sección de carga (lado derecho) Coloca las resistencias R3 (150Ω) y R4 (2.7Ω) tal como en la imagen, entre el conector y la batería. Coloca una batería (BAT1) de 5V, y conecta el negativo a tierra. Asegúrate de cerrar correctamente los interruptores (simulando conexión). 🔄 Simulación Usa "Interactive Simulation" en Proteus. Agrega etiquetas como "PUNTO A", "PUNTO B", etc., si deseas facilitar el seguimiento. Observa cómo el voltaje pasa a través de las resistencias y carga la batería. Puedes usar voltímetros o osciloscopios virtuales para observar los cambios de voltaje y corriente. ✅ Consejos finales Si no encuentras la resistencia exacta de 2.7Ω, puedes colocar una personalizada. Puedes usar Virtual Terminal si quieres simular señales de comunicación en el conector. El conmutador central (como se muestra en la línea de puntos) puede implementarse con switches DPDT o nodos que conectes manualmente en la simulación.

This project involves designing a complete schematic for a robotic arm controller based on the ESP32-C3 microcontroller, specifically using the ESP32-C3-MINI-1-N4 module. The design features a dual power input system and comprehensive power management, motor control, I/O interfaces, and status indicators—all implemented on a 2-layer PCB. Key Specifications: Microcontroller: • ESP32-C3-MINI-1-N4 module operating at 3.3V. • Integrated USB programming connections with reset and boot mode buttons. Power System: • Dual power inputs with automatic source selection: USB-C port (5V input) and barrel jack (6-12V input). • Power management using LM74610 smart diode controllers for power source OR-ing. • AMS1117-3.3 voltage regulator to deliver a stable 3.3V supply to the microcontroller. • Filter capacitors (10μF electrolytic and 100nF ceramic) at the input and output of the regulators. • Protection features including USBLC6-2SC6 for USB ESD protection and TVS diodes for barrel jack overvoltage protection. Motor Control: • Incorporates an Omron G5LE relay with a PC817 optocoupler and BC547 transistor driver. • Provides dedicated header pins for servo motors with PWM outputs. • Flyback diode protection implemented for relay safety. I/O Connections: • Header pins exposing ESP32-C3 GPIOs: Digital I/O (IO0-IO10, IO18, IO19) and serial communication lines (TXD0, RXD0), plus an enable pin. • Each I/O pin includes appropriate 10kΩ pull-up/pull-down resistors to ensure reliable performance. Status Indicators: • A power status LED with a current-limiting resistor. • A user-controllable LED connected to one of the GPIO pins. PCB Layout Requirements: • 2-layer PCB design with separate ground planes for digital and power sections. • Placement of decoupling capacitors close to power pins to reduce noise. • Adequate trace width for power lines to ensure efficient current flow. • Inclusion of mounting holes at the board corners for secure installation. • All components are properly labeled with correct values for resistors, capacitors, and other passive elements, following standard design practices for noise reduction, stability, and reliability. #RoboticArmController #ESP32C3 #SchematicDesign #PCBDesign #ElectronicsDesign #PowerManagement #MotorControl #EmbeddedSystems #IoT

Naze 32 Revision 6 Flight Controller Schematic At the heart of the Naze32 is a 32bit ST micro work horse of a processor, with untapped memory and cpu power and a host of equally impressive sensors. The Naze is also matched up with some of the nicest GUI programs and features to get the most out of your configuration. Naze32 rev6 Features: USB on right side PPM/PWM input as through-hole 3.3V, I2C on standard-size headers Fully pinout compatible with rev5 accessories (OSDoge etc) SBUS Inverter Spectrum satellite MPU6500 Sonar pads w/resistors added for direct connection to 5V sonar All extra pads (FT, GP, A5) on top, only sonar on bottom BMP280 barometer 16mbit flash Guide: https://www.dronetrest.com/t/naze-32-revision-6-flight-controller-guide/1605

Naze 32 Revision 6 Flight Controller Schematic At the heart of the Naze32 is a 32bit ST micro work horse of a processor, with untapped memory and cpu power and a host of equally impressive sensors. The Naze is also matched up with some of the nicest GUI programs and features to get the most out of your configuration. Naze32 rev6 Features: USB on right side PPM/PWM input as through-hole 3.3V, I2C on standard-size headers Fully pinout compatible with rev5 accessories (OSDoge etc) SBUS Inverter Spectrum satellite MPU6500 Sonar pads w/resistors added for direct connection to 5V sonar All extra pads (FT, GP, A5) on top, only sonar on bottom BMP280 barometer 16mbit flash Guide: https://www.dronetrest.com/t/naze-32-revision-6-flight-controller-guide/1605

Compact ESP32-S3 AI robot controller with DevKitC-1 module, 2S Li-ion power input, 5V buck regulator, optional clean 3.3V rail, TB6612FNG dual motor driver, OV2640 camera FPC, I2S audio, OLED, ultrasonic and TCRT5000 sensor headers, and a compact 2-layer PCB prepared for Gerber export.

Naze 32 Revision 6 Flight Controller Schematic At the heart of the Naze32 is a 32bit ST micro work horse of a processor, with untapped memory and cpu power and a host of equally impressive sensors. The Naze is also matched up with some of the nicest GUI programs and features to get the most out of your configuration. Naze32 rev6 Features: USB on right side PPM/PWM input as through-hole 3.3V, I2C on standard-size headers Fully pinout compatible with rev5 accessories (OSDoge etc) SBUS Inverter Spectrum satellite MPU6500 Sonar pads w/resistors added for direct connection to 5V sonar All extra pads (FT, GP, A5) on top, only sonar on bottom BMP280 barometer 16mbit flash Guide: https://www.dronetrest.com/t/naze-32-revision-6-flight-controller-guide/1605

Naze 32 Revision 6 Flight Controller Schematic At the heart of the Naze32 is a 32bit ST micro work horse of a processor, with untapped memory and cpu power and a host of equally impressive sensors. The Naze is also matched up with some of the nicest GUI programs and features to get the most out of your configuration. Naze32 rev6 Features: USB on right side PPM/PWM input as through-hole 3.3V, I2C on standard-size headers Fully pinout compatible with rev5 accessories (OSDoge etc) SBUS Inverter Spectrum satellite MPU6500 Sonar pads w/resistors added for direct connection to 5V sonar All extra pads (FT, GP, A5) on top, only sonar on bottom BMP280 barometer 16mbit flash Guide: https://www.dronetrest.com/t/naze-32-revision-6-flight-controller-guide/1605

Naze 32 Revision 6 Flight Controller Schematic At the heart of the Naze32 is a 32bit ST micro work horse of a processor, with untapped memory and cpu power and a host of equally impressive sensors. The Naze is also matched up with some of the nicest GUI programs and features to get the most out of your configuration. Naze32 rev6 Features: USB on right side PPM/PWM input as through-hole 3.3V, I2C on standard-size headers Fully pinout compatible with rev5 accessories (OSDoge etc) SBUS Inverter Spectrum satellite MPU6500 Sonar pads w/resistors added for direct connection to 5V sonar All extra pads (FT, GP, A5) on top, only sonar on bottom BMP280 barometer 16mbit flash Guide: https://www.dronetrest.com/t/naze-32-revision-6-flight-controller-guide/1605