USB Temperature Sensor

USB Temperature Sensor Circuit using PIC12F683 DS18B20
USB Temperature Sensor is an inexpensive compact gadget. If you want to make a USB-based temperature sensor, EnvStick is a good choice and cheap, homemade temperature sensor that plug into a USB port. It is to collect the room's ambient temperature in a simple way.

The USB temperature sensor EnvStick looks like a serial port - a COM port on Windows boxes. Here, you can see the typical output (on a program like Hyperterminal) - it waits

USB Temperature Sensor

Low Battery Disconnect Switch Circuit

Here is the circuit of battery voltage disconnect switch with 10-14V voltage range. The battery disconnect switch uses the versatile 555 timer IC can be found in many electronic circuits. Basically, the circuit aims to prevent damage to the battery due to over-discharge. Schematically illustrated on the monitor battery voltage and disconnect the battery from the circuit when it falls below a preset value.

The battery disconnect switch circuit uses two
Battery Disconnect Switch

Wireless Light Switch Circuit

Turn the lights from a distance is possible by using a wireless light switch. The function of this device is as a substitute for physical contact by a hand movement to activate a switch ON. In addition to activating an appliance from a distance is also avoided in case of shorting.

If you want to construct a remote light switch, here attached a simple light switch that works by delivering infrared energy waves are emitted into a phototransistor. The output of
Wireless Light Switch

How to Build a Remote Control Light Switch

Controlling an electrical device or appliance remotely can be done when you use the remote control light switch technology. No matter where you place to do it because you do not need to make direct physical contact of such operations as turning on the lights remotely.

Media's remote control uses RF wireless that consists of a transmitter and receiver modules that work on UHF frequency 433.92 MHz. One of the advantages of this system you do not
Remote Control Light Switch

Simple Piezoelectric Sensor Alarm Circuit

Here is a simple alarm circuit by using a vibration that comes from a thin piezoelectric sensor, which can be mounted on doors, desks, or media, that can vibrate when knocking the surface. Vibration or signal is then amplified and processed, and sound an alarm within a certain period.

Piezoelectric sensor in general is a device that serves to measure pressure, vibration, acceleration, force, or strain by transforming it into electrical signals. These
Piezoelectric Sensor

Computer Temperature Monitor

Computer Temperature Monitor Circuit
Excess heat too much can cause damage to the electronics. Similarly, on a computer or laptop, so monitor the temperature of CPU and other computer components are very important. Computer temperature monitor can help you keep the equipment running in good condition.

In order for a laptop computer temperature monitoring program to function for most of this type, then you need to activate the ACPI BIOS motherboard. This program serves as a controller of the
Computer Temperature Monitor

Motion Sensor Light Switch Circuit Diagram

Today many available commercial motion sensor light switches on the market, one of the brands that are sought after a Leviton motion sensor light switch type PR180-1LW Leviton decora Incandescent 500W, Passive Infrared Wall Switch Occupancy Sensor. You can buy it at a price of about $ 15. Motion sensors are widely used for home security, office, or the places that require extra security.

Motion sensor light switch is a human motion detector that works in a range of infrared detection. If the PIR sensor devices receive the infrared energy emitted by the human body, it will eventually be switching relay which in turn will turn on the lights. So the function of the use of this switch sensor for security purposes, particularly at nighttime conditions.

In addition to buying a human motion detector, if you want to do it yourself (DIY), a motion sensor switch, is now also widely available PIR sensor modules that are sold in general, so that by adding a high-gain amplifier which is equipped with a relay switch, then this it works as a motion sensor light switch.

Motion Sensor Light Switch