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how do I connect the mosfet with proper resistance so I can drive the LED strip ...

yapalexei

@copilot how do I connect the mosfet with proper resistance so I can drive the LED strip connected to J2 assuming the max consumption is 40 watts

copilot

To drive an LED strip with a MOSFET and ensure proper current handling, we'll need to consider the following:

Determine the current: Given:

Power ($P$) = 40 W
Voltage ($V$) = 12 V (assuming typical voltage for LED strips)

Using $P = VI$:

I = \frac{P}{V} = \frac{40 \, \text{W}}{12 \, \text{V}} = 3.33 \, \text{A}

Choose an appropriate gate resistor: A gate resistor (let's call it $R_{G}$) is often used to limit the current into the MOSFET gate to protect it and control the switching speed. We can use $R_1$ (1kΩ) or $R_2$ (10kΩ) from your list as $R_{G}$.
Connect the MOSFET properly:

Drain (D) to the negative side of the LED strip (J2:P2).
Source (S) to ground (GND).
Gate (G) to the control signal (from [U3: GPIOx]).

Connections

Power connections for the LED strip:
- Connect J2:P1 to the positive supply (e.g., 12V).
- Connect J2:P2 to Q1:D.
MOSFET and LED strip connections:
- Connect Q1:S to GND.
- Connect Q1:D to J2:P2.
Gate resistor connections:
- Connect R1:1 to [U3:GPIOx] (you could choose U3:GPIO5 or another available GPIO pin).
- Connect R1:2 to Q1:G.

Assume using GPIO5: Specific Connections

Connect Q1:D to J2:P2.
Connect Q1:S to GND.
Connect J2:P1 to the positive voltage supply (12V).
Connect R1:1 to U3:GPIO5.
Connect R1:2 to Q1:G.

Final Schematic:

[U3:GPIO5] -- [R1:1] -- [R1:2] -- [Q1:G]
[Q1:S] -- GND
[Q1:D] -- [J2:P2] -- LED Strip (Negative)
[J2:P1] -- 12V -- LED Strip (Positive)

Make sure to test the circuit and ensure proper MOSFET switching and LED strip operation. Adjust the gate resistor value if the MOSFET switching is not optimal.

what components need to be connected to the lm2596 to have 3.3vdc out?

yapalexei

@copilot what components need to be connected to the lm2596 to have 3.3vdc out?

copilot

To get a stable 3.3V output from the LM2596DSADJR4G, you will need several external components. Here are the necessary connections and calculations:

Required Components:

Input Capacitor (C1): Typically a 100 µF capacitor.
Output Capacitor (C2): Typically a 100 µF capacitor.
Inductor (L1): Suitable inductor value around 33 µH.
Adjustment Resistors (R1 & R2): Resistors to set the output voltage.
Schottky Diode (D1): Typically a diode like B5819W-TP.

Connections and Values:

Input Voltage:
- Connect $C1$ :1 to $U2$ :VIN
- Connect $C1$ :2 to GND
Output Capacitor and Inductor:
- Connect $U2$ :OUT to $L1$ :P1, $R1$ :P1, and $D1$ :K
- Connect $L1$ :P2 to $C2$ :+
- Connect $C2$ :- to GND
- Connect $D1$ :A to GND
Adjustment Resistors:
- Connect $R1$ :2 to GND
- Connect $R2$ :1 to $U2$ :FB
- Connect $R2$ :2 to the junction of $L1$ :P2 and $C2$ :+

Calculation for Feedback Resistors:

The output voltage $V_{out}$ for the LM2596 can be set using the formula:

V_{out} = V_{ref} \times \left(1 + \frac{R2}{R1}\right) + I_{adj} \times R2

Where:

$V_{ref}$ is the reference voltage, typically 1.23V.
$I_{adj}$ is usually small enough to be neglected.

To set $V_{out}$ to 3.3V:

3.3V = 1.23V \times \left(1 + \frac{R2}{R1}\right)

Solving for $\frac{R2}{R1}$:

\frac{3.3V}{1.23V} = 1 + \frac{R2}{R1}

\frac{R2}{R1} = \frac{3.3V}{1.23V} - 1 \approx 1.683

Choose standard resistor values such that the ratio is approximately 1.683. For instance:

$R1 = 1kΩ$
$R2 = 1.68kΩ$

Final Connection Summary:

Connect U2 to your input voltage.
Connect U2 to L1, R1, and D1.
Connect L1 to C2 and R2.
Connect C2, D1, and R1 to GND.
Connect R2 to U2.

Let me know if you need any further assistance or adjustments!

having J1 as the 12vdc input, I need to pass it to the lm2596 to convert to a st...

yapalexei

@copilot having J1 as the 12vdc input, I need to pass it to the lm2596 to convert to a stable 3.3vdc to power the esp12e that will control the n-channel mosfet to drive the LED strip connected to J2. how do I connect the terminals?

copilot

Sure, I can guide you through the connection process. Here are the detailed steps:

Power Input (J1 to LM2596):
- Connect J1:P1 to U2:VIN.
- Connect J1:P2 to GND.
LM2596 Output to ESP-12E:
- Connect U2:OUT to U3:VCC via a decoupling capacitor, C3:A.
- Connect C3:C to GND.
- Connect U2:GND to GND.
- Connect U2:FB to the regulated output side of C3:A.
ESP-12E Control of MOSFET:
- Connect a suitable GPIO pin of U3 (e.g., U3:GPIO5) to the gate of Q1:G via a pull-down resistor R1.
- Connect R1:P1 to GND.
- Connect the source of Q1:S to GND.
LED Strip Drive (J2):
- Connect J2:P2 to 12V.
- Connect J2:P1 to the drain of Q1:D.

Summary of Connections

Power Input:
- Connect J1:P1 to U2:VIN.
- Connect J1:P2 to GND.
Regulated Power Output:
- Connect U2:OUT to C3:A.
- Connect C3:C to GND.
- Connect U3:VCC to C3:A.
- Connect U2:GND to GND.
- Connect U2:FB to C3:A.
ESP-12E Control:
- Connect U3:GPIO5 to Q1:G via R1:P2.
- Connect R1:P1 to GND.
- Connect Q1:S to GND.
LED Strip Drive:
- Connect J2:P2 to 12V.
- Connect J2:P1 to Q1:D.

If you need any further assistance, please let me know!

how do I connect the PIR1 to vcc and to the GPIO4 properly?

yapalexei

@copilot how do I connect the PIR1 to vcc and to the GPIO4 properly?

copilot

To connect the PIR1 sensor to VCC and U3:GPIO4 properly, follow these steps:

Assumptions:

Assuming J1:PIN_4 is connected to a +3.3V or +5V power supply (depending on the operating voltage of the PIR sensor).

Connections:

Connect PIR1 to VCC
- Connect PIR1:DRAIN to J1:PIN_4.
- Connect PIR1:SOURCE to U3:GPIO4.
Ensure GND Connection
- Connect PIR1:GND to J1:PIN_3 (assuming J1:PIN_3 is connected to GND).

Summary:

Connect PIR1:DRAIN to J1:PIN_4.
Connect PIR1:SOURCE to U3:GPIO4.
Connect PIR1:GND to J1:PIN_3.

Let me know if you need any further adjustments or clarifications.

if Q1 is meant to drive 12 vdc out to PIN\_2 on J2 with a 3.3 vdc pwm signal and...

yapalexei

@copilot if Q1 is meant to drive 12 vdc out to PIN_2 on J2 with a 3.3 vdc pwm signal and the 12vdc comes in from PIN_4 on J2, how do I connect the terminals?

copilot

To use Q1 (an N-channel MOSFET) to drive 12VDC output with a 3.3VDC PWM signal, you'll need to connect it as follows:

Gate (G) of the MOSFET to the 3.3V PWM signal.
Source (S) of the MOSFET to GND.
Drain (D) of the MOSFET to the load, which in your case is J2:PIN_2.

For the 12VDC input:

Connect J2:PIN_4 to the positive 12VDC supply.
Connect the other side of the load (which is connected to Q1:Drain) to the 12VDC supply.

Here's the specific connection format:

Connect J2:PIN_4 to U2:VIN.
Connect Q1:G to the PWM signal (presumably from U3:GPIO5).
Connect Q1:S to GND (e.g., GND).
Connect Q1:D to J2:PIN_2.

Here’s a final summary of the connections:

Connect J2:PIN_4 to U2:VIN.
Connect Q1:G to U3:GPIO5.
Connect Q1:S to GND.
Connect Q1:D to J2:PIN_2.

Please verify that U3:GPIO5 is set to output the PWM signal in your project.

Q1 is not gonna do anything because it's not getting any power from PIN\_4 on J2...

yapalexei

@copilot Q1 is not gonna do anything because it's not getting any power from PIN_4 on J2. It should be getting 12vdc so that it can then release out to PIN_2

copilot

To ensure that Q1 (the IRLZ44NPBF) gets the required 12V DC power from PIN_4 of J2, we need to connect PIN_4 of J2 to the Drain (D) pin of Q1. The Source (S) of Q1 should connect to PIN_2 of J2.

Here are the specific connections:

Connect J2:PIN_4 to Q1:D
Connect Q1:S to J2:PIN_2

This will allow Q1 to switch the 12V from PIN_4 to PIN_2 accordingly. Ensure the gate (G) of Q1 is controlled properly to turn the MOSFET on and off as needed.

do I need to pull down or pull up unused io pins?

yapalexei

@copilot do I need to pull down or pull up unused io pins?

copilot

Pulling up or pulling down unused I/O pins on a microcontroller can help to prevent the pins from floating, which can lead to erratic behavior or increased power consumption due to the undefined state.

For the ESP-12E, it's generally good practice to either configure the unused I/O pins as outputs or use pull-up or pull-down resistors.

Here's what you should consider:

Configure as Output: Set the unused pins as outputs and write a low or high value to them, reducing the chance of floating.
Pull-Up/Pull-Down Resistors: Connect pull-up or pull-down resistors if they remain as inputs. For pull-down, choose a resistor value between 10kΩ to 100kΩ. Pull-up values are similar.

Specific Recommendations for Pins:

Available GPIO Pins: U3:GPIO2, U3:GPIO5, etc.
Considerations: Some GPIO pins have specific functions during boot (e.g., GPIO0 and GPIO2). Be cautious with pins like GPIO15, which must be low during boot.

Implementation Example for ESP-12E:

GPIO2: Can be pulled up if unused.
GPIO5: Can be pulled down if unused.

Suggested Connections:

Connect a 10k pull-up resistor between $\text{GPIO2}$ and VCC:
- Connect $\text{R1}:1$ to $\text{U3}:\text{GPIO2}$
- Connect $\text{R1}:2$ to $\text{U3}:\text{VCC}$
Connect a 10k pull-down resistor between $\text{GPIO5}$ and GND:
- Connect $\text{R3}:1$ to $\text{U3}:\text{GPIO5}$
- Connect $\text{R3}:2$ to $\text{U3}:\text{GND}$

Would you like to implement this in your current project, or do you have specific unused pins you're considering?

Resistance

4.7KΩ

Resistance

1kΩ

Resistance

4.7KΩ

Resistance

4.7KΩ

RST

PIR1 SOURCE - U3 GPIO4

Inductance

33uH

Capacitance

100uF

Reviews

Ground
A common return path for electric current. Commonly known as ground.
jharwinbarrozo
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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, 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
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