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I am planning to use the PIC16F877 for my power electronics project. Should I ne...
kangret

kangret

@copilot I am planning to use the PIC16F877 for my power electronics project. Should I need to build a circuit to run the microprocessor or do I need to connect an external crystal?
2y

copilot

For your project using the PIC16F877A microcontroller, you will need to build a minimal circuit to properly run the microprocessor. Here are the essential components and connections you'll need:
  1. Power Supply Connections:
    • Connect VDD (pins 11 and 32) to your positive voltage supply (typically +5V).
    • Connect VSS (pins 12 and 31) to ground.
    Make sure to decouple these power pins with a 0.1 µF ceramic capacitor placed close to the microcontroller to filter out noise.
  2. Crystal Oscillator for Clock: The PIC16F877A requires an external clock source to run. You can connect an external crystal oscillator to provide a stable clock signal. Here are the connections for the crystal:
    • Connect a crystal oscillator across OSC1/CLKI (pin 13) and OSC2/CLKO (pin 14).
    • Place two load capacitors (typically 22pF, but check your crystal's datasheet for exact values) from each of these pins to ground.
    The precise value of the crystal depends on your requirements for clock speed. The PIC16F877A can support up to 20 MHz, but if your application does not demand high-speed operation, a lower frequency like 4 MHz or 8 MHz might be more power-efficient.
  3. Reset Circuit: To ensure the microcontroller starts up in a defined state, you should implement a reset circuit on the MCLR pin. Here's a basic setup:
    • Connect a 10kΩ resistor between the MCLR/VPP pin (pin 1) and VDD.
    • Optionally, for external reset functionality, you can connect a normally open push-button from MCLR/VPP to ground. Add a small capacitor (like 0.1 µF) between MCLR/VPP and ground to debounce the switch and filter noise.
These connections provide the basic operational setup for the PIC16F877A. Depending on your project's specific needs, you might need additional connections for programming and debugging purposes (using RB6/PGC and RB7/PGD for ICSP), and to utilize the microcontroller's various peripherals (ADC, UART, PWM, etc.).
Remember, each application may have specific requirements beyond these basics, so adjust component values and configurations as necessary.
2y
1
i am trying to build a buck-boost converter can you help me to place the related...
kangret

kangret

@copilot i am trying to build a buck-boost converter can you help me to place the related components and wire them together?
2y

copilot

Certainly! Designing a buck-boost converter involves a few key components: an inductor, a switch (typically a MOSFET), a diode, a capacitor, and a control IC if you're not designing the control loop yourself. For this explanation, I'll assume you're using the PIC16F877A for control, assuming it's programmed to manage PWM for the switching component. If more specific control ICs or external PWM controllers are intended, please adapt the recommendations accordingly. Given your current project components, it seems we may need to introduce a few new ones for the buck-boost converter. Here are the components we'll add and how to wire them together:
Required Additional Components:
  1. L1 (Inductor): Needed to store and release energy. A value of 10µH is a common starting point, but this depends on your desired input voltage, output voltage, switching frequency, and load.
  2. Q1 (MOSFET): Acts as the switch. Ensure it can handle the input voltage and the anticipated current.
  3. D1 (Diode): Ensures current flow in one direction - from the inductor to the load during the discharge phase. A Schottky diode is often used for its low forward voltage drop.
  4. C2 (Output Capacitor): Filters out the ripple in the output from the switching process. A value of 22µF is a typical starting point, but this will depend on your load and desired ripple.
  5. R3 (Feedback resistor net): For setting the output voltage. This will depend on the control method used by the PIC16F877A and the specifics of your buck-boost requirements.
Wiring:
  • For the power stage:
    • Connect L1:1 to V1:ANODE.
    • Connect L1:2 to Q1:Drain.
    • Connect Q1:Source to GND.
    • Connect D1:Anode to GND.
    • Connect D1:Cathode to L1:2 and C2:1.
    • Connect C2:2 to GND.
  • For the control stage with PIC16F877A (assuming you're using one of its PWM-capable pins for controlling Q1):
    • Assume using RC2/CCP1 (pin 17) for PWM output.
    • Connect U1:RC2/CCP1 to Q1:Gate.
  • Feedback network for output voltage control (details depend on your specific algorithm and requirements):
    • Implement a voltage divider from the output to U1:AN0 (pin 2) or another ADC-capable pin, for feedback. This typically involves two resistors (like R3 and another resistor, which we'll call R4 here):
      • Connect C2:1 to R3:1.
      • Connect R3:2 to R4:1 and U1:RA0/AN0.
      • Connect R4:2 to GND.
Additional Notes:
  • The choice of specific component values (L1, C2, Q1, D1, R3, R4) depends on your specific requirements for input voltage, output voltage, maximum current, and switching frequency.
  • This overview provides a general guideline for designing a simple buck-boost converter. Depending on your project’s power requirements, you may need to select more robust components or include additional filtering and protection circuits.
  • Ensure that the MOSFET Q1 is adequately rated for your circuit's maximum voltage and current, and don't forget the heat sinking if necessary.
  • Please adjust resistors in the feedback network (R3 and the hypothetical R4) based on the desired output voltage, considering the reference voltage of the ADC in the PIC16F877A and the voltage division ratio.
If you have any specific requirements (like the input voltage range, desired output voltage and maximum output current), please provide those details for more tailored guidance.
2y
2
R1
Resistance
500 Ω
V1
R2
Resistance
500 Ω
  • Ground
    Ground
    A common return path for electric current. Commonly known as ground.
    jharwinbarrozo
    20.5M
  • Net Portal
    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
    jharwinbarrozo
    43.0M
  • Power Net 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
    jharwinbarrozo
    11.4M
  • 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
  • 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 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
    15.8k
  • 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
    47 kOhms ±5% 0.125W, 1/8W Chip Resistor 0805 (2012 Metric) Automotive AEC-Q200 Thick Film #forLedBlink
    jharwinbarrozo
    1.2M
  • 875105359001
    875105359001
    10uF Capacitor Aluminum Polymer 20% 16V SMD 5x5.3mm #forLedBlink #commonpartslibrary #capacitor #aluminumpolymer #radialcan
    jharwinbarrozo
    1.2M
  • CTL1206FYW1T
    CTL1206FYW1T
    Yellow 595nm LED Indication - Discrete 1.7V 1206 (3216 Metric) #forLedBlink
    jharwinbarrozo
    1.1M

Rare Jade Esper Photo Analyser

Rare Jade Esper Photo Analyser thumbnail
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