A cellular rotary phone - the dialing takes forever! And here in Colorado - on a 10-digit dialing system - you don`t dare mess up the number. Where do you even buy a rotary phone these days Oddly enough, there are quite a few phones on Froogle that had push buttons within the faux rotary face. That won`t do. How about the Senior Store ! No really - they sell rotary phones for seniors.
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Cool, but $49. 95 is a bit too much. BoldOldPhones is also another great resource for rotary phones. They even have colors! Where else to look Ebay of course! You can find anything! There are quite a few people selling rotarys of different qualities and ages on Ebay. Most are ~$20. We got our 1957 `Automatic Electric Company` rotary phone for $10 + $8 in shipping. Not too shabby. Whoops. The auction alluded to the `original tone ringer` which looks like they meant the phone was upgraded. Oh well - I`ll have to find another rotary with the old bell type ringer for Port-O-Rotary v2. Now those are some components! Time to replace them with technology of the 21st century. I tore the phone apart, wiped everything down with some warm water and elbow grease. On a side note, I think the previous owner was a smoker. Here`s a couple photos of the rotary element up close to help you get an idea of what is going on. Basically, the entire system is just the opening and closing of switches. When you twist the rotary around, nothing much happens. When you let the rotary go, the dial starts turning back to its original position. As it does this, the grey oblong wheel spins once for every two numbers. Two numbers That seems silly. Actually, it makes it very easy. This picture is about as good as it gets and it`s still not very good. You can see the top two paddles slightly further apart. There seems to be some nice liquid gel that is...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
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The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
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In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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