Free electronic circuit design and schematic diagram
Below is video tutorial about how to assemble the crossover on the Aviatrix speaker. The speaker system has couple different version that you can build. There are mass loaded transmission line and channel speaker or we can used it as surround speaker at home theater system. There are slight changes in the crossover based on how you going to use […]
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Another circuit (from Horowitz and Hill) is shown below. The circuit is almost the same except that the base of Q2 is not connected to the ground. The voltage at the emitters, Ve, is the important thing here. Q1 is off and the output goes low when the base of Q1 rises to 0.7V above Ve if the input is […]
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An LM311 comparator circuit with the pin numbers is shown in the schematic diagram figure below. The ground for this transistor is at pin 1 and the open collector output is at pin 7. It is shown pulled up to the logic voltage of +5 with a 1k resistor, which is typical. The LM311 output can sink 8 mA. A […]
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The simplest I to V converter is the humble resistor. However, presenting a nonzero impedance to the source of input current is the disadvantage of the humble resistor. If the device providing the input current has very little compliance or does not produce a constant current as the output voltages changes, this can be fatal. A photovoltaic cell is a […]
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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 moreBelow is video tutorial about SMPS Buck Converter Design Example Part 2 of 2. This entire video explained us about synchronous buck converter. The circuit design of synchronous buck converter is available on this video. The design is similar with previous synchronous buck converter. This converter has efficiency about 94.4% and only losses 0.59 watts. Watch the video for further […]
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