Free electronic circuit design and schematic diagram
This is a noninverting amplifier circuit. This circuit amplify the input voltage with the same phase with output voltage. This circuit has infinite input impedance, but using 741, the input impedance would be hundreds of megaohms. The output impedance is a little, in fraction of an ohm. Here is the schematic diagram of the circuit: This circuit is made for […]
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This is a Inverting amplifier circuit. This circuit is used to amplify the application that requires large(closed-loop) voltage gain since it has low input impedance. The output of this circuit is an amplified signal with different phase wit the input. This circuit uses a feedback. Here is the schematic diagram of the circuit: The R1 is 10K and R2 is […]
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This is a emitter follower circuit. This circuit is popular with name buffer circuit. This circuit has gain of 1, so the input voltage is not amplified. Here is the schematic diagram of the circuit: This circuit is a noninverting amplifier with R2 zero and the R1 infinite. This circuit has low output impedance and high input impedance. The LM310 […]
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The bias path can compromise the high input impedance you would otherwise get with an op-amp as with transistors amplifiers. This particularly with ac-coupled inputs where a resistor to ground is mandatory. The bootstrap circuit shown below is a possible solution if that is a problem. The 1mF capacitor makes the upper 100k resistor look like a high impedance current […]
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Using circuit shown below, we can invert or amplify without inversion by flipping a switch. The voltage gain is depending on the switch position. It could be either +1 or -1. The variation of the circuit comes in two version, A and B. I personally prefer B version, since there is no moment when the noninverting input voltage level is […]
Read moreThe wireless technology is developed well today’s. This video is about the wireless sensor development kit. This video explains the wireless sensor from jennic, jennic 5139. This module include microcontroller, 2.4G radio, RAM, and ROM. This module is easy to use. This video can transmit data from the outside to the receiver on the inside. Here is the tutorial video: […]
Read moreThis is a video of Santa alarm. This video shows how to make a alarm when the refrigerator’s door is opened. The requirement to make this alarm is a 9V battery, the reed switch, magnet, wire and buzzer. This buzzer will buzz when the magnet is taken away from the reed switch. Here is the tutorial video: The red wire […]
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