Use parts of an old or broken mobile phone? Why not! One useable part of a mobile phone is its LCD, which can be used in many applications where we need data visually presented. Nokia 3310 has a LCD with 84*84 dots, that isn’t that hard to get and can be very useful in DIY (do it yourself) electronics. This page describes a device I designed to test such a display and turned out to be the circuit that I am proud to share with you. Since my motto is �simplicity in construction�, with a few parts you will be able to create a relatively accurate and visually appealing thermometer…
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Pemanfaatan LCD HP Nokia 3310 Sebagai Thermometer Dengan DS18B20
This multimeter was designed to measure output voltage and current in a PSU, where the current sense shunt resistor is connected in series with load at the negative voltage rail. It needs only one supply voltage that can be acquired from main PSU. An additional function of the multimeter is that it can control (switch on and off) an electric fan used to cool the main heatsink. The power threshold at which the fan switches on can be adjusted using One Touch Button Setup..
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Voltmeter + Ammeter LCD panel
It is easy to install a couple of infrared emitter and receiver at the entrance of your room and maybe you connect them to the light, but you cannot control the light in this way! You will never know how many person inside and if the room is empty or not. In this system, every thing is under control, because it is smart enough to know how many persons inside; and it can identify the direction of them, so the light will be turned OFF when the room is unoccupied; and ON otherwise! This tutorial will show you how…
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Light Control System
Buying a gift for someone special or a loved one can sometimes be difficult or expensive. The flashing heart is the answer. It is easy to build and even the inexperienced hobbyist should be able to build it. The estimated cost for the circuit is $25 if all the parts are purchased new. With The Flashing Heart, you can get your message across in bright lights…
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Lampu Flash Berbentuk Hati
Since iButton DS1990A introduced in market from Dallas Semiconductor (MAXIM), it has been used in many applications concerning security, access control systems etc. In this project we will use iButton as a key to an electronic lock. This electronic lock can use many different kinds of iButtons and can store up to 9 different keys. One of the keys is the master key and is permanent stored in memory. With the use of master key we can add or remove slave keys…
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Kunci Electronic iButton
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