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I want design a new circuit, please help me. I have NPN proximity sensor, that i...
hamedm

hamedm

1- please tell me why you using mosfet and you don't use BJT transistors? 2-please specify common and usual part number for every component that satisfy all parameters. (assume my output current is not greater than 100 mA) 3- if you can using BJT transistors, please redesign. thanks
1y
hamedm

hamedm

@copilot I want design a new circuit, please help me. I have NPN proximity sensor, that is Normally Open. I want have a output wire, that when the output of sensor is connected to the Ground: the output wire will be 24V without drop voltage. And when the output of sensor is not connected to the Ground: the output wire will be exactly 0V volt. thanks
1y

copilot

Sure, I can help you with that. To achieve this behavior, we can use an N-channel MOSFET and a pull-up resistor to create an inverting circuit. Here's a step-by-step guide on how to set it up:
Components Needed
  1. NPN Proximity Sensor (Normally Open)
  2. N-channel MOSFET (e.g., IRLZ44N or similar logic-level MOSFET)
  3. Pull-up Resistor (e.g., 10kΩ)
  4. Power Supply (24V DC)
  5. Common Output Wire
Circuit Design
  1. Proximity Sensor Output Connection:
    • Connect the sensor output to the Gate of the N-channel MOSFET.
  2. Pull-up Resistor Connection:
    • Connect one end of the pull-up resistor to the Gate of the N-channel MOSFET.
    • Connect the other end of the pull-up resistor to the 24V power supply.
  3. Source Connection:
    • Connect the Source of the N-channel MOSFET to GND.
  4. Drain Connection:
    • Connect the Drain of the N-channel MOSFET to the common output wire.
    • Also, connect the common output wire to the 24V power supply.
Electrical Connections
  • When the sensor output is not connected to ground:
    • The pull-up resistor keeps the MOSFET gate at 24V.
    • This keeps the MOSFET off, and there is no connection between the drain and source.
    • The common output wire is connected to 24V through the pull-up resistor.
  • When the sensor output is connected to ground:
    • The gate of the MOSFET is pulled to GND.
    • This turns the MOSFET on, connecting the drain to the source, and hence the ground.
    • The common output wire is now pulled to GND (0V).
Detailed Connections
  • Sensor Output to MOSFET Gate.
  • MOSFET Source to GND.
  • Pull-up Resistor: One end to MOSFET Gate, other end to 24V.
  • MOSFET Drain to common output wire.
  • Common output wire to 24V.
Here's a summary of the connections:
  • Connect Sensor Output to MOSFET Gate.
  • Connect Gate to 24V using a 10kΩ pull-up resistor.
  • Connect MOSFET Source to GND.
  • Connect MOSFET Drain to the common output wire.
  • Connect common output wire to 24V.
With this circuit, you will have a common output wire that is:
  • 24V when the sensor output is not connected to ground,
  • 0V when the sensor output is connected to ground.
Feel free to adjust component values or MOSFET choice according to your specific requirements. If you have any further questions or need clarifications, let me know!
1y
hamedm

hamedm

1- please tell me why you using mosfet and you don't use BJT transistors? 2-please specify common and usual part number for every component that satisfy all parameters. (assume my output current is not greater than 100 mA) 3- if you can using BJT transistors, please redesign. thanks
1y

copilot

Sure! Let's address your questions one by one.
1. Why Use a MOSFET Instead of a BJT Transistor?
  • Efficiency: MOSFETs typically have lower on-state resistance (RDS(on)R_{\text{DS(on)}}), resulting in less power dissipation and higher efficiency.
  • Gate Drive Requirements: MOSFETs, especially logic-level MOSFETs, can be driven directly by low-voltage logic signals (e.g., the output of the proximity sensor) without requiring additional base current as BJTs do.
  • Switching Speed: MOSFETs generally switch faster than BJTs, making them more suitable for applications requiring quick response times.
2. Part Numbers for Components
Given your requirement of not exceeding 100 mA, here are some standard parts that you can use:
N-channel MOSFET:
  • IRLZ44N: Logic-level N-channel MOSFET, capable of handling up to several Amperes, so 100 mA is no problem.
  • 2N7000: Ideally suited for small current applications, easily handles the 100 mA and has a low threshold voltage.
Pull-up Resistor:
  • 10kΩ Resistor: Standard value, 1/4W or 1/8W resistor is sufficient.
BJT Transistor Redesign
If you prefer using BJTs, you can create a similar circuit using an NPN transistor. Here's the equivalent circuit design:
Components Needed
  1. NPN Proximity Sensor (Normally Open)
  2. NPN Transistor (e.g., 2N2222 or BC547)
  3. Pull-up Resistor (e.g., 10kΩ)
  4. Base Resistor (e.g., 10kΩ or calculated based on the specific transistor's requirements)
  5. Power Supply (24V DC)
  6. Common Output Wire
Circuit Design
  1. Sensor Output Connection:
    • Connect the sensor output to the Base of the NPN transistor through a base resistor.
  2. Pull-up Resistor Connection:
    • Connect one end of the pull-up resistor to the 24V power supply.
    • Connect the other end of the pull-up resistor to the Collector of the NPN transistor.
  3. Emitter Connection:
    • Connect the Emitter of the NPN transistor to GND.
  4. Common Output Wire Connection:
    • Connect the Collector of the NPN transistor to the common output wire.
Electrical Connections
  • When the sensor output is not connected to ground:
    • The base of the NPN transistor is at 24V through the base resistor.
    • This keeps the transistor off.
    • The common output wire is connected to 24V through the pull-up resistor.
  • When the sensor output is connected to ground:
    • The base of the transistor is connected to GND through the sensor output.
    • This turns the transistor on, connecting the collector to the emitter.
    • The common output wire is now pulled to GND (0V).
Detailed Connections
  • Sensor Output to Base of the NPN transistor through a Base Resistor (10kΩ).
  • Pull-up Resistor (10kΩ): One end to 24V, other end to Collector of the NPN transistor.
  • Connect Emitter of the NPN transistor to GND.
  • Connect Collector of the NPN transistor to the common output wire.
  • Also, connect the common output wire to 24V.
Sample Part Numbers
  • NPN Transistor: 2N2222, BC547.
  • Base Resistor: 10kΩ, 1/4W.
  • Pull-up Resistor: 10kΩ, 1/4W.
Summary of NPN Transistor Connections
  • Connect Sensor Output to Base of the NPN transistor through a 10kΩ resistor.
  • Connect 10kΩ Pull-up Resistor: One end to 24V, other end to Collector of the NPN transistor.
  • Connect Emitter of the NPN transistor to GND.
  • Connect Collector of the NPN transistor to the common output wire.
  • Connect Common Output Wire to 24V.
With these connections, you will achieve the same desired behavior with an NPN transistor:
  • 24V on the output wire when the sensor output is not connected to ground.
  • 0V on the output wire when the sensor output is connected to ground.
Feel free to ask any further questions or request additional clarifications!
1y
hamedm

hamedm

1-please tell me can I add two indicator LED Red and Green to this circuit without drop voltage? 2- your MOSFET design not works, Please solve it again with two indicator LED. thanks
1y

copilot

Sure, let's refine the design to ensure that it works as intended and incorporates two indicator LEDs without significant voltage drop.
Design with MOSFET and Indicator LEDs
Let's use two LEDs:
  • Red LED: Indicates when the output wire is 0V.
  • Green LED: Indicates when the output wire is 24V.
Components Needed
  1. NPN Proximity Sensor (Normally Open)
  2. N-channel MOSFET (e.g., IRLZ44N or 2N7000)
  3. Resistors: 1kΩ and 1kΩ (for LEDs)
  4. Red LED
  5. Green LED
  6. Power Supply (24V DC)
Circuit Design
  1. Proximity Sensor Output Connection:
    • Connect the sensor output to the Gate of the N-channel MOSFET.
  2. Pull-up Resistor Connection:
    • Connect one end of a 10kΩ resistor to the Gate of the MOSFET.
    • Connect the other end of the 10kΩ resistor to the 24V power supply.
  3. Source Connection:
    • Connect the Source of the MOSFET to GND.
  4. Drain Connection:
    • Connect the Drain of the MOSFET to the common output wire.
    • Also, connect the common output wire to the 24V power supply through a 1kΩ resistor and Green LED.
    • Connect the common output wire to GND through a 1kΩ resistor and Red LED.
LED Indicator Connections
  • Green LED:
    • Anode to 24V through a 1kΩ resistor.
    • Cathode to common output wire.
  • Red LED:
    • Anode to common output wire through a 1kΩ resistor.
    • Cathode to GND.
Electrical Connections
  • When the sensor output is not connected to ground:
    • The Gate of the MOSFET is at 24V due to the pull-up resistor.
    • This keeps the MOSFET off, so the common output wire is connected to 24V.
    • The Green LED lights up because it has a path from 24V through the LED and resistor to the common output wire.
    • The Red LED is off because it is reverse-biased.
  • When the sensor output is connected to ground:
    • The Gate of the MOSFET is pulled to GND.
    • This turns the MOSFET on, connecting the Drain to the Source GNDGND.
    • The common output wire is now at GND (0V).
    • The Red LED lights up because it has a path from the common output wire to GND through the LED and resistor.
    • The Green LED is off because it no longer has a potential difference to drive current through it.
Detailed Connections Recap
  1. Sensor Output to MOSFET Gate through a 10kΩ pull-up resistor to 24V.
  2. Connect Source of the MOSFET to GND.
  3. Connect Drain of the MOSFET to the common output wire.
  4. Connect Green LED (with 1kΩ resistor) from 24V to common output wire.
  5. Connect Red LED (with 1kΩ resistor) from common output wire to GND.
Summary Implementation
  • Sensor Output to Gate of the MOSFET.
  • 10kΩ Resistor: One end to Gate of the MOSFET, other end to 24V.
  • MOSFET Source to GND.
  • MOSFET Drain to common output wire.
  • 1kΩ Resistor: One end to Green LED anode, other end to 24V. Connect Green LED cathode to common output wire.
  • 1kΩ Resistor: One end to Red LED anode, other end to common output wire. Connect Red LED cathode to GND.
This circuit ensures that your indicator LEDs show the correct state of the output without a significant drop in voltage. The Green LED lights up when the output is 24V, and the Red LED lights up when the output is 0V.
Feel free to ask any further questions or request additional clarifications!
1y
hamedm

hamedm

Please solve the problem with BJT. Thanks
1y

copilot

Sure, let's redesign the circuit using BJTs and incorporate the two indicator LEDs.
Components Needed
  1. NPN Proximity Sensor (Normally Open)
  2. NPN Transistor ($e.g., 2N2222$ or $BC547$)
  3. Resistors: $10k\Omega$ for the base, $1k\Omega$ for the LEDs
  4. Red LED
  5. Green LED
  6. Power Supply (24V DC)
Circuit Design
  1. Proximity Sensor Output Connection:
    • Connect the sensor output to the Base of the NPN transistor through a 10kΩ\Omega base resistor.
  2. Pull-up Resistor Connection:
    • Connect one end of a 10kΩ\Omega resistor to the 24V power supply.
    • Connect the other end of the 10kΩ\Omega resistor to the Collector of the NPN transistor.
  3. Emitter Connection:
    • Connect the Emitter of the NPN transistor to GND.
  4. Collector Connection:
    • Connect the Collector of the NPN transistor to the common output wire.
  5. LED Indicator Connections:
    • Green LED:
      • Anode to 24V through a 1kΩ\Omega resistor.
      • Cathode to common output wire.
    • Red LED:
      • Anode to the common output wire through a 1kΩ\Omega resistor.
      • Cathode to GND.
Electrical Connections
  • When the sensor output is not connected to ground:
    • The base of the NPN transistor is at 24V through the base resistor, which means very little or practically no current flows to the base.
    • This keeps the transistor off.
    • The pull-up resistor keeps the common output wire at 24V.
    • The Green LED lights up because it has a path from 24V through the LED and resistor to the common output wire.
    • The Red LED is off because it is reverse-biased.
  • When the sensor output is connected to ground:
    • The base of the transistor is connected directly to GND through the sensor output.
    • This turns the transistor on, connecting the collector to the emitter (GND).
    • The common output wire is now at GND (0V).
    • The Red LED lights up because it has a path from the common output wire to GND through the LED and resistor.
    • The Green LED is off because it no longer has a potential difference to drive current through it.
Detailed Connections Recap
  1. Sensor Output to Base of the NPN transistor through a 10kΩ\Omega resistor.
  2. 10kΩ\Omega Pull-up Resistor: One end to 24V, other end to Collector of the NPN transistor.
  3. Connect Emitter of the NPN transistor to GND.
  4. Connect Collector of the NPN transistor to the common output wire.
  5. Green LED (with $1k\Omega$ resistor) from 24V to common output wire.
  6. Red LED (with $1k\Omega$ resistor) from common output wire to GND.
Summary Implementation
  • Connect Sensor Output to Base of the NPN transistor through a 10kΩ\Omega resistor.
  • Connect 10kΩ\Omega Pull-up Resistor: One end to 24V, other end to Collector of the NPN transistor.
  • Connect Emitter of the NPN transistor to GND.
  • Connect Collector of the NPN transistor to the common output wire.
  • Green LED:
    • Anode to 24V through a 1kΩ\Omega resistor.
    • Cathode to common output wire.
  • Red LED:
    • Anode to common output wire through a 1kΩ\Omega resistor.
    • Cathode to GND.
This circuit ensures that your indicator LEDs show the correct state of the output without a significant drop in voltage. The Green LED lights up when the output is 24V, and the Red LED lights up when the output is 0V.
1y
hamedm

hamedm

No, I want the circuit have not any drop voltage? Now when NPN sensor is connected, output wire is 12V?
1y

copilot

I understand the requirement now. We need a circuit where the common output wire is exactly 24V when the sensor is not connected to ground and exactly 0V when the sensor is connected to ground, without any drop. This can be achieved using BJTs and proper configuration. Let's design it again with those requirements:
Components Needed
  1. NPN Proximity Sensor (Normally Open)
  2. NPN Transistor (e.g., 2N2222 or BC547)
  3. PNP Transistor (e.g., 2N2907 or BC557)
  4. Resistors: 10kΩ for the base, 1kΩ for the LEDs
  5. Red LED
  6. Green LED
  7. Power Supply (24V DC)
Circuit Design
  1. NPN Transistor Configuration:
    • Connect the sensor output to the Base of the NPN transistor through a 10kΩ resistor.
    • Connect the Emitter of the NPN transistor to GND.
  2. PNP Transistor Configuration:
    • Connect the Collector of the PNP transistor to the 24V power supply.
    • Connect the Emitter of the PNP transistor to the common output wire.
  3. Connection Between Transistors:
    • Connect the Collector of the NPN transistor to the Base of the PNP transistor through another 10kΩ resistor.
    • Connect a 10kΩ pull-down resistor from the Base of the PNP transistor to GND.
  4. LED Indicator Connections:
    • Green LED:
      • Anode to 24V through a 1kΩ resistor.
      • Cathode to common output wire.
    • Red LED:
      • Anode to the common output wire through a 1kΩ resistor.
      • Cathode to GND.
Detailed Connections Recap
NPN Transistor:
  • Connect Sensor Output to Base of the NPN transistor through a 10kΩ resistor.
  • Connect Emitter of the NPN transistor to GND.
  • Connect Collector of the NPN transistor to the Base of the PNP transistor through another 10kΩ resistor.
PNP Transistor:
  • Connect Collector of the PNP transistor to 24V power supply.
  • Connect Emitter of the PNP transistor to the common output wire.
  • Connect a 10kΩ pull-down resistor from the Base of the PNP transistor to GND.
LED Indicators:
  • Green LED:
    • Anode to 24V through a 1kΩ resistor.
    • Cathode to common output wire.
  • Red LED:
    • Anode to common output wire through a 1kΩ resistor.
    • Cathode to GND.
Summary Implementation
  1. Sensor Output to Base of the NPN transistor through a 10kΩ resistor.
  2. NPN Transistor:
    • Connect Emitter to GND.
    • Connect Collector to the Base of the PNP transistor through another 10kΩ resistor.
  3. PNP Transistor:
    • Collector to 24V power supply.
    • Emitter to common output wire.
    • Base connected to Collector of the NPN transistor through a 10kΩ resistor and a 10kΩ pull-down resistor to GND.
  4. Green LED:
    • Anode to 24V through a 1kΩ resistor.
    • Cathode to common output wire.
  5. Red LED:
    • Anode to common output wire through a 1kΩ resistor.
    • Cathode to GND.
Working:
  • When the sensor is not connected to ground:
    • The NPN transistor is off, and the PNP transistor is on due to its base being pulled high.
    • The common output wire is connected to 24V with no voltage drop.
    • The Green LED lights up, indicating 24V on the common output wire.
  • When the sensor is connected to ground:
    • The NPN transistor turns on, pulling the base of the PNP transistor to ground.
    • This turns the PNP transistor off, connecting the common output wire to GND (0V).
    • The Red LED lights up, indicating 0V on the common output wire.
This design ensures the common output wire accurately reflects 24V when the sensor is not grounded and 0V when it is grounded, without any significant drop in voltage. Let me know if you have any further questions or need additional modifications!
1y
hamedm

hamedm

not works. you have make mistakes. you confused in connecting the pins of BJTs. because Emitter of PNP must be connected to 24V and collector of PNP must be common output wire.
1y

copilot

Components Needed
  1. NPN Proximity Sensor (Normally Open)
  2. NPN Transistor (e.g., 2N2222 or BC547)
  3. PNP Transistor (e.g., 2N2907 or BC557)
  4. Resistors: 10kΩ for the base, 1kΩ or 10kΩ for the LEDs (depending on desired brightness)
  5. Red LED
  6. Green LED
  7. Power Supply (24V DC)
Circuit Design
  1. NPN Transistor Configuration:
    • Connect the sensor output to the base of the NPN transistor through a 10kΩ resistor.
    • Connect the emitter of the NPN transistor to GND.
    • Connect a pull-down resistor (10kΩ) from the base of the NPN transistor to GND to ensure it turns off when the sensor is not triggered.
  2. PNP Transistor Configuration:
    • Connect the emitter of the PNP transistor to the 24V power supply.
    • Connect the collector of the PNP transistor to the common output wire.
    • Connect a pull-up resistor (10kΩ) from the base of the PNP transistor to 24V to ensure it turns off when the NPN transistor is not conducting.
  3. Connection Between Transistors:
    • Connect the collector of the NPN transistor to the base of the PNP transistor through a 10kΩ resistor.
  4. LED Indicator Connections:
    • Green LED:
      • Anode to 24V through a 1kΩ resistor.
      • Cathode to common output wire.
    • Red LED:
      • Anode to the common output wire through a 1kΩ resistor.
      • Cathode to GND.
Electrical Connections
  • When the sensor output is not connected to ground:
    • The NPN transistor is off due to the pull-down resistor at its base.
    • The base of the PNP transistor is held at 24V by the pull-up resistor, turning the PNP transistor off.
    • The common output wire is connected to 24V through the collector-emitter junction of the PNP transistor.
    • The Green LED lights up because it has a path from 24V through the LED and resistor to the common output wire.
    • The Red LED is off because it is reverse-biased.
  • When the sensor output is connected to ground:
    • The NPN transistor turns on, creating a low resistance path between its collector and emitter.
    • This pulls the base of the PNP transistor to ground through the 10kΩ resistor, turning the PNP transistor on.
    • The common output wire is now connected to GND (0V) through the NPN transistor.
    • The Red LED lights up because it has a path from the common output wire to GND through the LED and resistor.
    • The Green LED is off because there is no potential difference to drive current through it.
Detailed Connections Recap
  1. Sensor Output to base of the NPN transistor through a 10kΩ resistor.
  2. Pull-down Resistor (10kΩ) from the base of the NPN transistor to GND.
  3. NPN Transistor:
    • Connect emitter to GND.
    • Connect collector to the base of the PNP transistor through another 10kΩ resistor.
  4. PNP Transistor:
    • Emitter to 24V power supply.
    • Collector to the common output wire.
    • Base connected to collector of the NPN transistor through a 10kΩ resistor and a 10kΩ pull-up resistor to 24V.
  5. Green LED:
    • Anode to 24V through a 1kΩ resistor.
    • Cathode to common output wire.
  6. Red LED:
    • Anode to common output wire through a 1kΩ resistor.
    • Cathode to GND.
Summary Implementation
  1. Sensor Output to Base of the NPN transistor through a 10kΩ resistor.
  2. Pull-down Resistor (10kΩ) from the base of the NPN transistor to GND.
  3. NPN Transistor:
    • Emitter to GND.
    • Collector to the base of the PNP transistor through another 10kΩ resistor.
  4. PNP Transistor:
    • Emitter to 24V.
    • Collector to common output wire.
    • Base connected to collector of the NPN transistor and a 10kΩ pull-up resistor to 24V.
  5. Green LED:
    • Anode to 24V through a 1kΩ resistor.
    • Cathode to common output wire.
  6. Red LED:
    • Anode to common output wire through a 1kΩ resistor.
    • Cathode to GND.
Working:
  1. When the sensor output is not connected:
    • The base of the NPN transistor is high because of the pull-down resistor.
    • The NPN transistor is off, leaving the PNP transistor in the off state as its base is pulled to 24V through the pull-up resistor.
    • The common output wire is connected to 24V.
    • The Green LED lights up.
    • The Red LED is off.
  2. When the sensor output is connected to ground:
    • The base of the NPN transistor is pulled to ground, turning it on.
    • The collector of the NPN transistor pulls the base of the PNP transistor low, turning the PNP transistor on.
    • The common output wire is pulled to ground.
    • The Green LED is off.
    • The Red LED lights up.
Using this design, the output voltage will be exactly 24V or 0V as required, without any significant voltage drop.
1y
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    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 #CommonPartsLibrary
    jharwinbarrozo
    1.5M
  • Generic Inductor
    Generic Inductor
    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 #generics
    jharwinbarrozo
    15.5k
  • 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
Inverting the PNP sensor thumbnail
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