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    Why Encoder circuits use OR logic gate and Decoder use AND?

    I am searching for answer why Encoder circuit uses OR logic gate to encode input to output and Decoder uses AND logical gate? Can anyone help me with some explanation?
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    How to connect tweeter with speaker, series or parallel?

    "Happy New Year" to all:) I have bought a tweeter but did not get manual with it. I do not know how to connect it to my speaker, series connection or parallel connection. They also provide a 6.3μF 100v bi-directional ( no positive or negative symbol on it) capacitor to connect with the tweeter...
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    Can anyone provide me a link or book how to make a woofer at home?

    I am searching from last 2 weeks on google on "How to make woofer / speaker" at home. I have found an assembly video on youtube : But it does not contain proper technical information such as; If I want to make / assemble / reassemble 100 watt 8 or 10 inch 8Ω woofer at home, 1. What the...
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    Can I use 12 Ohms instead of 8 Ohms speaker?

    Recommend load resistance is 8Ω, what would be happen if I use 3 speaker ( each have 4Ω) in series connection = 12 Ω? 1. Can it damage the IC ? 2. Can it damage the speaker? 3. Can it reduce speaker performance?
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    Need to know suitable value of capcacitor for my PCB

    I have a Transformer : 35 v ac output for 220v AC 50 hz input. Target: 45 to 51 dc output Will be used in : audio amplifier I have a pcb like image bellow: 1. I need to know what would be suitable value of capacitors beside these diodes? 2. Electronics shopkeeper told me that it will...
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    Will it effect laptop's battery if I use charger connected when fully charged?

    I have just bought a new Lenovo Laptop, IdeaPad-310. I think modern laptop / notebook has a overcharged controller that control charger when to charged and once battery fully charged, it should not charge the battery and laptop should take power from charger instead of battery to run. In system...
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    What would be the effect If I change 4700uF capacitor to 18000uF?

    I have a dc bridge rectifier circuit to make ac to dc 50 volts output. It required two 4700uF capacitor, but I have 18000uF 70v in hand. If I use this 18000uF capacitor instead of 4700uF, will it damage my amplifier circuit- stk4231? Local electronic seller told that it will not effect if...
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    What can be happen if I use 10 inch 8-ohms speaker instead of 8 inch 8- ohms?

    Q1. If I use 10 inch instead of 8 inch speaker both having 8 ohms, will it decrease or increase sound quality? Q2. Currently I am using 8 inch 8-ohms speaker in stk4231 ic based sound system. Within 70% volume range it plays almost nice as I expected. But more than this voice seems clear- only...
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    Can it damage IC if connecting two speaker in parallel in output?

    I have just assembled a "STK 4231 ii" based amplifier unit what is 2 channel 100w stereo audio amplifier. I also have two 8ohm 8 inch speaker and two 4 ohms Speaker. If I connect two 8ohm in two output of my amplifier plays little noise - I think it is because speaker box vibrate much. But if...
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    Need to know pin out (input output voltage ) of an old UPS Transformer

    I have an old ups transformer, brand name is missing with ups cover box. This ups was operating in 220~230v input. I am uploading an image of this transformer, I need to know how to identify input voltage (primary cable) and output voltage ratings of other cables. Please help.
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