Soluții

This PC or Documents Folder opens automatically at Startup in Windows 11

Windows Explorer window keeps popping up

The first thing you can do is to open Task Manager and restart the Explorer process. See if that helps. If not, then the fix for this problem does exist, but it requires modifying the registry. Serious problems might occur if you modify the registry incorrectly. Therefore, you must follow these steps carefully. For added protection, back up the registry before modifying it, or create a system restore point first. Then, you can restore or revert if the changes are not what you expected.

This PC or Documents folder opens automatically at Startup in Windows

If when you start your Windows 11/10, the This PC, Computer or Documents folder opens up automatically at start-up, first check if you have set the option to Restore previous folder windows at logon via Folder Options. If that option is checked, uncheck it and see if it sorts the issue. If it is unchecked, try this:

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How to Re-Enable GPT-4o Model in ChatGPT for Mac

After just a few days of trying GPT-5, many Plus subscribers have decided they prefer GPT-4o’s personality and creative collaboration skills. As a result, OpenAI is allowing paying customers to continue to use the prior-generation GPT-4o model if they don’t want to use the new GPT-5 model. If you count yourself among them, here’s how to bring the older model back into your ChatGPT for Mac experience.

To restore GPT-4o in your ChatGPT for Mac app, you first need to enable the setting through the web interface:

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Arduino Motion Sensor Guide (Using a PIR Sensor)

A PIR (Passive Infrared) sensor detects motion by measuring changes in infrared radiation emitted by objects (like humans or animals) within its field of view.

PIR sensors are commonly used for:

Component Quantity Notes
Arduino Uno (or Nano, Mega, etc.) 1 Any compatible board
PIR Motion Sensor (HC-SR501 or similar) 1 Adjustable sensitivity and delay
Breadboard 1 For easy connections
Jumper wires ~5 Male-to-male recommended
LED 1 Optional for visual indication
220Ω resistor 1 For LED current limiting
USB cable 1 For programming and power

 Understanding the PIR Sensor

Typical PIR module (e.g., HC-SR501) has 3 pins:

Pin Label Function
1 VCC Power (connect to +5V)
2 OUT Sends HIGH when motion is detected
3 GND Connects to Ground

Adjustable knobs (optional):

  • Sensitivity: changes detection range (typically 3–7 meters)
  • Time delay: how long output stays HIGH after motion (usually 0.3s–5min)

Wiring Diagram

PIR Sensor Arduino Notes
VCC 5V Power supply
OUT D2 Digital input pin
GND GND Common ground
LED (+) D13 Visual output (optional)
LED (–) GND (via 220Ω resistor) Current limit

Connect VCC → 5V, GND → GND, OUT → D2, LED → D13 (optional)

Arduino Code Example


// PIR Motion Sensor with LED Example

int pirPin = 2; // PIR sensor output pin
int ledPin = 13; // LED pin

int pirState = LOW; // Default state
int val = 0; // Variable for reading the pin status

void setup() {
pinMode(pirPin, INPUT);
pinMode(ledPin, OUTPUT);
Serial.begin(9600);
Serial.println("PIR Motion Sensor Active");
}

void loop() {
val = digitalRead(pirPin); // Read input value from PIR

if (val == HIGH) {
digitalWrite(ledPin, HIGH); // Turn LED ON
if (pirState == LOW) {
Serial.println("Motion detected!");
pirState = HIGH;
}
} else {
digitalWrite(ledPin, LOW); // Turn LED OFF
if (pirState == HIGH) {
Serial.println("Motion ended!");
pirState = LOW;
}
}
}

Explanation: The PIR output goes HIGH when motion is detected. The LED turns on and a message is printed to the Serial Monitor.

How It works

  1. Warm-up time: After powering up, the PIR sensor takes ~30–60 seconds to stabilize.
  2. Detection: When an object moves, the sensor’s output pin goes HIGH.
  3. Reset: After the set delay, the output returns LOW until new motion is detected.

1. Control a Relay

Use motion detection to control a light or appliance:


int relayPin = 8; // connect to relay module IN pin
// Replace ledPin with relayPin in code

2. Buzzer Alarm

Add a buzzer that sounds when motion is detected:


int buzzerPin = 9;
digitalWrite(buzzerPin, HIGH);

3. Serial Logging

Send motion logs to a computer or IoT platform for analysis.

4. Automation

Combine PIR with an LDR (light sensor) so it only triggers lights at night.

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Unealta gratuita pentru verificare domenii si adrese ip suspecte – AbuseIPDB

Corespondenta nesolicitata este de obicei primul pas al unei tentative de phishing.

AbusedIPDB este o bază de date publică care colectează și listează adresele IP și domeniile care au fost raportate ca fiind implicate în activități malițioase pe internet. Gândește-te la ea ca la o listă neagră masivă, actualizată constant de comunitatea de securitate, care te ajută să răspunzi la întrebarea: „Este acest IP/domeniu periculos?”

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