Top 10 Electronic Circuits February 2010

It’s time for the Top 10 Electronic Circuits for February 2010 and we have some articles that went down and others that had jumped a lot in the top 10. We are glad that you like the articles posted on the site and will do the best from now on to bring you the best electronics related informations, circuits and projects. Let’s start the show!

February Top 10 Electronic Circuit Articles

  1. Fishing thermometer
    This simple to construct water fishing thermometer circuit is intended to be used in sports applications like for example a fishing contest. A sensor measures the water temperature at a certain depth. A scale made of 16 LEDs shows the water temperature.
  2. 1 watt fm transmitter
    A very good 1 watt fm transmitter circuit, very easy to build circuit. It has 4 transistors, one is a very stable oscillator, followed by a buffer stage to prevent frequency variation when you adjust the transmitter.
  3. Electronic Thermometer
    This digital thermometer circuit diagram uses a common 1N4148 diode as the temperature sensor. The temperature coefficient of the diode, -2 mV / 0C is exploited for this application to create an accurate electronic thermometer.
  4. 12V dimmer
    A dimmer is quite unusual in a caravan or on a boat. Here we describe how you can make one. So if you would like to be able to adjust the mood when you’re entertaining friends and acquaintances, then this circuit enables you to do so. Designing a dimmer for 12 V is tricky business.
  5. Solar charger
    Here is a circuit to charge Lead Acid or Ni-Cd batteries using solar energy. The circuit harvests solar energy to charge a 6 volt 4.5 Ah rechargeable battery for various applications. The charger has Voltage and Current regulation and Over voltage cut off facilities.
  6. Tiny FM radio
    Perhaps this is one of the simplest FM Receiver that can receive the FM stations available locally. Its simple design makes it ideal for a pocket sized FM receiver. The output of the receiver drives a head phone.
  7. LED Dimmer
    This simple LED dimmer circuit has 2 transistors, 1 resistor and 2 potentiometers.
    Typical segment displays LEDs consume around 25 mA for each segment and should be limited to it with resistors. If a six digit display is to be current limited, at least 42 series resistors are needed.
  8. Touch dimmer switch
    By simply touching this touch dimmer switch you can increase the light intensity of incandescent lamps in three steps. Initially, when mains switch is on, the bulb is off. Now, if you touch the touch plate, the bulb glows dimly. On second touch, the bulb gives medium light. At the third touch, the bulb is driven fully. Another touch puts off the light.
  9. Wireless light switch
    You may use this wireless light switch instead of physical contact with switches which may be dangerous if there is any shorting. The wireless light switch circuit described here requires no physical contact for operating the appliance.
  10. Ultrasonic sensor
    This Ultrasonic Sensor Circuit consists of a set of ultrasonic receiver and transmitter which operate at the same frequency. When something moves in the area covered the circuit’s fine balance is disturbed and the alarm is triggered. The ultrasonic circuit is very sensitive and can be adjusted to reset itself automatically or to stay triggered till it is reset manually after an alarm.


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