Caleb sez, "My kids really have to scream from the back of my VW bus for me to hear them while we're flying down the highway. With this little hack, we have a nice intercom for them to talk to me with!"
The circuit to make two phones work as an intercom is extremely simple. You can see in the picture below, all you really need is a little bit of spare phone cable (or a spare junction box), a resistor, and a power source. A single 680 ohm resistor should let you use the 12V directly from your car or even a standard 9V battery if you’re wanting to make this portable (in a treehouse for example).
This circuit allows both ends to be picked up and audio to be transmitted either way. If you want it to ring, you’re going to have to come up with a slightly different circuit. However, since you’re not using the black and yellow wires, you could theoretically rig up a circuit with a buzzer that would run off the normal 12V.
Using old phones as an intercom in your VW bus (or anywhere else)
Lured by the internet’s pervasive insistence that it represents a superior, more comfortable typing experience, I recently went back to an old-timey mechanical keyboard. This was a mistake. I am now a hamfisted ASCII jazz disaster.
SpareOne Emergency Phone is a basic cellphone powered by AA batteries. This gives it a relatively short time on a charge, but means that it will have a charge after being stuffed in a drawer or glove box for months. I came across this during my search for the perfect basic phone, but be warned: […]
Low-cost carrier Easyjet has prototyped “Sneakairs,” a pair of shoes that have small vibrating motors and Bluetooth links; they work in concert with your mobile phone’s mapping app, buzzing left or right when it’s time to turn, and twice if you’ve gone the wrong way.
Jared Sinclair developed the RSS reader app Unread, which made $10,000 in its first 24 hours on the iOS market. And we’ve all heard the story of Flappy Bird developer Dong Nguyen, whose creation was reportedly earning $50,000 a day at the height of its 2013 explosion. While those are rare examples, they’re also testament to the […]
If you or your company’s IT system are besieged by black hat cyber attacks, an ethical hacker might be all that stands between crippling damage and a company’s long-term prosperity. It’s no wonder that the market for IT security specialists is exploding. Certification is the key – so learn the tenets of ethical hacking and get […]
Your laptop and mobile devices are top of the line…so why are you trotting out that raggedy decades-old suitcase when you go somewhere? Time to up your travel game with a complete 5-piece Herschel Travel Luggage bundle…and we’ll even give it to you for free!Of course, you’ve got to win the Ultimate Herschel Travel Bundle […]