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Recent content by franciscorc

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    First audio electronics project - looking for some reference

    HI No your approach is not the RMS value.Your idea to make a precision rectifier and flter the signal is a very good start point. But do not use a large filtering, because of if you do that you are going to decrease frequency response.The output signal of this circuit(precision rectifier...
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    do different trim pots have different sensitivity?

    Hi Yes you can replace the trimpot for a multi turn type with the same resistance value.If you can not read the value of the trimpot , take it out and measure the value with your multimeter. Best
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    differential spiral inductor

    Hi all I don´t know much about this issue, but a differential spiral inductor increases the Q Factor and the bandwidth compared to a linear one. Best Francisco
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    How to convert 48V DC to 3.3V DC

    Hi all. Not ever is necessary using a switching DC-DC converter. LM¨2576 3.3 type HV can make the job.You have not answered how much power do you need.For this CI 1A is guaranteed. Datasheet avaliable at ALLDATASHEET.COM - Datasheet search site, Datasheet search site for Electronic Components...
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    How to convert 48V DC to 3.3V DC

    Hi All How much power do you need at 3.3V DC output? Best Francisco
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    Any ready circuit to control DC motor , 30 volt 5-10 Amper , with current feedback?

    Hi PIC series 18F1220/1320 a very good to control DC motors via PWM. Best Francisco
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    Mosfet Driving Circuit

    Hi Try a look at SG3525 OR KA 3525. At [url=http://www.maxim.ic.com] you can find a lot of examples. BEST
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    Analog linear Voltage level converter

    Hi Keith. I agree with , great circuit. I´ve just implemented a real circuit and it works like a charm. I´ve replaced LM741( I don´t have one) by Ca3140 and +/-3 by +/-5. SO the circuit works. By the way, do you know anyone that could help me in my thread...
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    Help me with making the 4046 VCO

    Hi all If you want to make two oscillators take a look in DS1090 fram Dallas. Best Francisco
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    Analog linear Voltage level converter

    Hi all I have this working in Proteus 7.7.This circuit generates an output of 0 to -5v.Put an inverter in the output......... Of course it may need some litle adjustments in the resistor values, and a fet input opamp like like CA3140, and an offset adjust to work in the real world.It is not a...
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    Analog linear Voltage level converter

    Hi All You could try this as a start point. Best Francisco
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    how to specified model of certain component in Proteus

    Hi all There is no way to specific a model for many components in proteus.It is because of proteus doens´t have a simulator models for these components.Pay attention when you select some components at the upper right side of the popup screen proteus shows the model type it have for the...
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    electric brush test for

    Hi all I work in a company that makes electromedical equipments. To be aproved all of our products must pass a series of tests, EMC, insulation(4KV), mechanical and ground connection resistance as well. The resistance must be in the range of mili Ω. To measure this we use a equipment that...
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    AMPLIFIER and superposition theorem

    Hi all Look, this is a very simple circuit . I place this just as a start point to your project. It is likely you need much more precision. Best Francisco
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    Photo transistor biasing

    Hil All The photo trasistor is a infrared Type(receiver).To maximaze sensitivity you should use an infrared diode instead of a white led. Take a look in the figures for the white led(pag 6) and the photo transistor(pag3) you will see the peak emmission is at about 460nm for the white led but...

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