And that's it: Now you can use the security cam app on your new phone to view the feed from your old phone's camera, and you've made your home more secure without spending much at all.

Giving your phone new life takes only a speedy wipe then an app download. You can add a dedicated phone mount if you want too. Then you have a handy security camera to keep watch over a home office, play area, entryway or other important spot! Read on for our full walk-through.

1. Download Alfred (Android, iOS) on both your old and new phones. You don't have to use a phone as a monitoring tool -- you can also download Alfred to your tablet or PC if you prefer to keep watch from there. Just make sure the app is on both devices.

For more, check out six quick tips for getting the most out of your home security camera and the best DIY home security systems.

4. On the old phone, repeat the same steps, but instead of selecting Viewer, select Camera. And make sure to sign in to the same Google account.

3. Once you get to the sign-in page, click Sign in with Google (a Google account is required) and sign in with your Google account credentials.

Alfred is free to use and gives you a remote view of your live feed, motion detection with alerts, free cloud storage, a two-way audio feed and use of both the front and rear cameras. To unlock additional features, like higher-resolution viewing and recording, zoom capabilities, ad removal and 30-day cloud storage, you can upgrade to Alfred Premium.

If Alfred isn't really doing it for you, you can explore other cam app options, too. Other apps that can give your old phone a security cam upgrade include:

Bei einer Erhöhung der zeitlichen Auflösung nimmt die Rechenzeit des Modells zu. Daher muss bei der Erstellung bzw. Auswahl eines Modells in Anhängigkeit zur Fragestellung zwischen zeitlichem Detailgrad und Rechenzeit abgewogen werden.

Is your old phone too old to trade in for a shiny new iPhone 16 or similar upgrade? If you won't get much cash back, take a moment to consider this popular alternative: Recruit your smartphone as a free security camera for your home instead.

One of the best app options for setting up your phone as a security camera is Alfred. It's cross-platform, so it doesn't matter if your old phone was an Android phone or iPhone. And the same goes for your new phone.

Streaming video is very power-intensive, and the phone will be on 24/7. To keep the phone from dying in the first few hours, you will need to position it close to a power source. A 10-foot Micro-USB or Lightning cable will give you more flexibility in where you put it.

Zur Reduktion der zeitlichen Komplexität eines Modells werden Typtage eingesetzt. Typtage bilden typische Tagesprofile für bestimmte Bedingungen, zum Beispiel für bestimmte Jahreszeiten, ab. Auch Werktage und Wochentage können zu Typtagen zusammengefasst werden. Eine Vielzahl von Tagen wird durch einen Typtag repräsentiert und die Modellparameter müssen nur für diesen Typtag berechnet werden. Je nach Fragestellungen setzt sich ein Typtag aus einer verschiedenen Anzahl von Zeitscheiben zusammen. Bei der Verwendung von Typtagen ist jedoch zu beachten, dass zeitschrittübergreifende Zusammenhänge in geeigneter Weise erhalten werden müssen. Ein Beispiel für zeitschrittübergreifende Zusammenhänge ist die Entwicklung von Speicherfüllständen, welche aus einer kontinuierlichen Abfolge von Beladevorgängen und Entladevorgängen resultieren.

Die zeitliche Auflösung eines Modells beschreibt die Länge einer Berechnungsperiode innerhalb eines Modells. In einer Berechnungsperiode werden alle Parameter, die innerhalb des Modells kalkuliert werden, ermittelt. Für die darauf folgende Berechnungsperiode werden diese Parameter erneut bestimmt.

To begin, you will need to choose a security camera app. Most apps offer many of the same features, such as local streaming, cloud streaming, recording and storing footage locally or remotely, and motion detection and alerts. Once you're set up, you will be able to monitor your living space and control your security camera from anywhere, straight from your new phone.

Smartphones will eventually age out of security updates, which means they can eventually become vulnerable to attacks. If your old phone is still online -- like when you're using it as a security camera -- that's a problem.

To mount or position the camera, a small smartphone tripod or suction-cup car mount can work wonders and help you position the camera in an inconspicuous place. To broaden the field of view, consider buying a wide-angle lens for your phone, something that can be purchased for between $5 and $20 online.

After you have the stream up and running, you will need to set up and position the camera. You may want it focused on the main entry point to your home, your backyard, the place where you store valuables or a point you think might be particularly vulnerable. You can also set up an IP camera as a baby monitor.

From your new phone, you can change a few more settings, such as turning notifications on or off, setting a camera or viewer name, adding other people to your Trust Circle (granting other people access to your video feeds), removing a camera, checking how many times a camera has disconnected, setting motion detection sensitivity and enabling a low-light filter on cameras.

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First, we recommend wiping any personal data off the phone before you transform it into a camera. Second, automate your updates when possible. Third, consider giving the phone a final use-by date, after which you'll recycle it. These days, companies try to push security updates for five to seven years after release (with some going even longer in recent years). We have a full guide that discusses this issue if you'd like to learn more.

Finally, if we've got you excited about using your smartphone for home security purposes, don't forget that you can also download an app like Hidden Camera Detector to automatically search for telltale signs that there's a cam watching in the room. Airbnb may have outlawed indoor security cameras, but we don't blame you if you still want to check when you're traveling.

Die Dauer einer Berechnungsperiode ist abhängig von der Aufgabenstellung und dem insgesamt betrachteten Zeitraum. Je kleiner der betrachtete Zeitraum ist, desto kleiner ist meist die zeitliche Auflösung des Modells. Typischerweise hat ein Kurzfristmodell zur Einsatzplanung von Kraftwerken eine zeitliche Auflösung von einer Viertelstunde bzw. einer Stunde. In einem Langfristmodell wird häufig eine zeitliche Auflösung von einem Jahr gewählt.

Once both phones are signed in to Alfred, you're pretty much done with the setup. Alfred has simplified the camera options to include only a few settings. On iOS, you can only enable motion detection, choose between the front and rear cameras, and enable or disable audio. If you're using an Android device, you have those options and can also enable continuous focus, have Alfred automatically reopen if the phone reboots, set a resolution and enable a passcode lock.