Aman bharti

  • Content count

  • Joined

  • Last visited

  1. Homemade MIC Amplifier Loudspeaker connection circuit You can connect condenser MIC with any amplifier circuit as given below diagram . This circuit will work very well with any type of Audio amplifier. Use only 5-6v for condenser MIC for best result. Audio amplifier circuit need 6-24v as per amplifier specification. Connect the positive terminal of mic with 47 k resistor in series with positive supply and negative terminal of mic is directly connected to negative supply or ground. And enjoy this easy homemade MIC Loudspeaker. This Circuit works with any type of amplifier circuit. If you have no any audio amplifier then you can make an small amplifier very easily with LM386 ic. This is very popular amplifier ic and available on any electronic part store. For more Click here You can check for more simple circuit here
  2. Aman bharti

    0-30V Stabilized Power Supply

    10A High Current Adjustable Voltage Regulator using LT1038
  3. For more detail click here A small Positive current required at the Base terminal for the turning on the transistor. By sending varying levels of current to the base, the amount of current flowing through the collector to emitter may be regulated. When we apply a small Positive supply at base , then Current between emitter and collector will passed and we say that transistor is turn on. A very small amount of current may be used to control a large amount of current, this property is known as amplifier . . A Diode with Parallel of relay coil in reverse connection is necessary for protection the transsistor. This must connected on both PNP and NPN
  4. Aman bharti


    Automatic Room Light And Security Alarm circuit Using PIR Motion Sensor
  5. When Light fall on LDR in DAY then the Resistance of LDR goes LOW And at this situation the maximum voltage Dropped With Negative supply (Ground) by cross through LDR and Voltage at the Base of transistor Q1 is Very LOW. When the Voltage goes to very LOW (Below0.7v) at BASE of Q1 then Transistor not get ON and no Power flows between COLLECTOR and EMITTER. Gate Voltagr of TRIAC is LOW. Now TRIAC Remain OFF Because It not TRIGGERED. At Night Time when no light incident on LDR then the internal Resistance of LDR comes HIGH and Very less amount of Power cross through LDR to ground , then the Voltage At base Terminal of transistor become increase (above 0.7v) and now transistor turn ON and current starts flow between Emitter and COLLECTOR. Therefor the Voltage increasing at GATE of TRIAC BT136. As voltage increase at GATE then TRIAC get Triggered . After Triac triggerd it Turn on and Passes the Power Supply between terminal 2 to terminal 1 and Bulb Switched On. For more sensitivity use 2 LDR with parallel. For more detail go to And also go to
  6. Aman bharti

    555 dc motor controller

    DC FAN Motor Speed Controller Regulator Circuit Works ON Principle of Pulse Width Modulation (PWM) technique , By Using This Technique Controlling Of DC Motor Speed is very Smoothly And Noise Free. Tested on 12v 1 A DC Motor For Full detail with live demo click on By This Method Smoothly Controlled The Speed Of DC Motor At Negligible Noise BY using This Circuit You can control the speed of DC Fan by tunning the (Potentiometer) volume control variable resistance. These circuits are based on 555 Timer .
  7. Aman bharti

    Clap Switch Circuit Electronic Project Using 555 Timer

    High Sensitive Clap Operated Sound controlled ON OFF Switch Project This clap operated ON OFF Switch circuit is very sensitive and easily operated upto distance of 5 Meter If condenser MIC is fix into a Special type of Cover to Receiving More Sound From Maximum Distance. This Clap/Sound controlled ON OFF Switch circuit consists two ICs , two NPN transistors, One PNP Transistor and some other components. The LM358 and 4017 ic is used. LM358 is an opamp-comparator which has two Op-Amp in a single ic chip. This ic is dual operational Amplifier But in this circuit one op-amp is used. For Full detail click on link
  8. Check For Electronics ideas,circuits and projects on
  9. Aman bharti

    DIY a Compact RC Switch

    Here a link of very simple and effective remote controlled switch for any appliance (single load) without any microcontroller. Click here This circuit can constructed at home using CD4017 ic and IR sensor. very easily and operated with any TV Remote. ( Tested, Must see the demo video )