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Latest Blog Posts for Free Electronic Circuit Diagram

  • Digital Thermometer Circuit
    on Sep 23, 2011 in Measurement Circuit
    Here’s a circuit for the easy availability of inexpensive digital multi meters, and integrated circuit temperature sensors, it is now very easy to build a sensitive and accurate digital thermometer that can be used for many experiments around the h...
  • 0-50V 1A Laboratory Power Supply Circuit
    on Sep 23, 2011 in Power Supply Circuit
    This is the design circuit for laboratory power supply that is characterized by its wide adjustable voltage range and its robustness. Continuous voltage adjustment is necessary, as well as current limiter for safety and robustness. You can build suit...
  • 1.5 – 35 Volt DC Regulated Power Supply Circuit
    on Sep 23, 2011 in Power Supply Circuit
    This is a figure for the circuit of regulated power supply. It is a small power supply that provides a regulated voltage, adjustable between 1.5 and 35 volts at 1 ampere. This circuit is ready to use, you just need to add a suitable transformer. This...
  • 1 KW Power (Watt) Meter Circuit
    on Sep 23, 2011 in Measurement Circuit
    This is a design circuit for watt-meter circuit that has measurement range up to 1-KW. This circuit can give the complete (X)(Y) function although uses only one transistor. Actually, this circuit is used for 117 Vac±50 Vac operations. For lower or l...
  • 20W Power Tube Amplifier Using EL34
    on Sep 23, 2011 in Amplifier Circuit
    This is a design circuit for 20W power amplifier which build based tube component EL34. EL34 is very famous tube and great for power tube amplifier. The circuit above is complete circuit contains tube amplifier circuit diagram and power supply circui...
  • 2-36V Adjustable Regulator Power Supply Circuit Using LM1458 ICHere’s the figure of the design circuit for power supply circuit that is adjustable 18-36 volts and is currently shown as being limited to 2 amps, but up to 3 amps in a small current sense resistor of Options (0.3 ohm). 2N3055 and 2N3053 transistor...
  • 5V FET Voltage Regulator Circuit
    on Sep 23, 2011 in Regulator Circuit
    Here’s a design circuit for voltage regulator circuit gives a stable 5V output from unregulated inputs (more than 5V). The stability of the output voltage is good enough, only change less than 0.1 volts when the load current changes about 60mA. The...
  • 22W Amplifier Circuit for 12V Power Supply SystemsHere’s a design circuit for 22-W Amplifier circuit that is designed for or 12-V DC power supply Systems. There are many application for  this circuit,  such as in car audio  application. In car electrical power supply system, the 12V power suppl...
  • 5 Volts Switching Power Supply Circuit Using LM2575 IC
    on Sep 23, 2011 in Power Supply Circuit
    Here’s a design circuit for switching power supply circuit that is using LM2575 IC as main controller. A transistor the energy is at 4 volts through him and for 3 amperes through it, may solve approximately 12 watts of heat the problem is from t...
  • 60-120MHz FM Receiver Circuit Using AFC
    on Aug 29, 2011 in Receiver Circuit
    We can say in simple words that AFC will lock the receiver to any valid RF signal. Below, we can see a basic block diagram of an receiver. The VCO is mixed with the RF signal which enter the mixer (yellow). The VCO can be a coil and a tunable capacit...
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