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Type: Posts; User: Thayne

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    Closed: Re: Capacitors for Amp Circuit

    I can barely (ear to the speaker) hear it with a megaboom speaker. My headphones can play it a little better. It is more like I notice it is gone when I shut it off and hear silence. The speakers I...
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    Closed: Re: Capacitors for Amp Circuit

    It is especially helpful to have the practical effects and an "overall picture" of what you hear, based on the numbers, described -- especially comparing different size capacitors, in this case. I...
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    Closed: Re: Capacitors for Amp Circuit

    Not really too concerned. Only concerned enough to post some questions.
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    Closed: Re: Capacitors for Amp Circuit

    I am using a 12v power supply. But, the circuit works best closer to 16-18v (so I read). Eventually, I will have other power supply options, so I would rather plan for that. So, I will go for the...
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    Closed: Re: Capacitors for Amp Circuit

    I think I will try out the 0.1uF input capacitors with 1000uF output capacitors.

    edit: I forgot to ask... For the output capacitors to the speakers what will happen if I use 1000uF/16v instead of...
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    Closed: Re: Capacitors for Amp Circuit

    OK, I think I understand the relationship a little better -- still a long way to go. This is my first circuit from scratch. After some searching, I was able to find a few 0.10uF and 0.47uF (and have...
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    Closed: Capacitors for Amp Circuit

    The datasheet for the TDA1517 has a sample circuit that calls for two, 1uF capacitors for the left and right inputs (pins 1 and 9). In a pinch. can I use 10uF capacitors? What difference to the sound...
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    Closed: Re: repurpose Power Relay from other circuit

    That is almost it. The diagram I have is not as good as that one, in terms of similarity. I think this one you found is close enough I can figure it out. Thank you!
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    Closed: Re: repurpose Power Relay from other circuit

    I can't find a schematic of the board. I found out the board was discontinued a long while ago. I found a diagram of a similar board by this company, but it is basically less helpful than looking at...
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    Closed: repurpose Power Relay from other circuit

    I have an old, discontinued, Zone Control Module from a former radiant floor heat system that I want to re-purpose for use of the power relay. My plan is to send a signal to the power relay from an...
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    Closed: Re: LM741 Bass/Treble & Volume Control

    The circuit I posted in #1? That circuit gives me a headache. I never looked close enough at it to find that part. I admit, I was hoping someone would post a better example to work off. I was having...
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    Closed: Re: LM741 Bass/Treble & Volume Control

    First, thanks for the responses. I will download the circuit and check it out - thanks for that. edit: That circuit is exactly for me. Nice and easy and helps me understand what is going on. Thanks!...
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    Closed: Re: LM741 Bass/Treble & Volume Control

    OK. I understand. I have a lot more op amps around, I will just have to sort through them all. The 741 would have been great. Look at the attached pics of the main board my wife found going to trash....
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    Closed: LM741 Bass/Treble & Volume Control

    A couple weeks ago, I made a simple amp circuit with a TDA1517 chip. Now, I want to add a bass/treble and volume control circuit before the amp. There are a lot of example circuits online, I have...
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    Closed: Re: Simple Amp Circuit - My First Ever

    So, if I add the amplifier circuit circuitspedia posted above (one for each speaker output), I would power those two circuits separately (like I think it shows)? I am still not quite sure how that...
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    Closed: Re: Simple Amp Circuit - My First Ever

    I don't want to go crazy, but the theory of this is what I was thinking. I just don't know how to do it.

    - - - Updated - - -



    Yes, I think this will do it. I can just add this on to what I...
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    Closed: Re: Simple Amp Circuit - My First Ever

    I said I built it according to the datasheet.

    Here is the circuit from the datasheet -- I attached it.

    The "garbage" comment was a good one. The difference is, I built the circuit, not the...
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    Closed: Simple Amp Circuit - My First Ever

    I made my first circuit the other day. It is with a TDA1517. All parts were salvaged from the garbage. I was just looking up datasheets as I took things apart until I found something to build. The...
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    Closed: Re: Broken 240/120 switch on Transformer

    I got my Arduino Mega to build a 3D printer and a CNC. I also got a few ESP32s setup for another project. I was hoping to use this transformer as a (small, portable) power supply. I already have 3.3...
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    Closed: Re: Broken 240/120 switch on Transformer

    It has no marking, but it was inside a metal box that said it was a car battery charger. It had a plug to the main and to clips (red/black) to the battery. Inside was only an LED and a 6A10 diode. I...
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    Closed: Re: Broken 240/120 switch on Transformer

    Yes. My multi-meter was buzzing on all connections -- but two connections buzzed louder than the other two (across the switch orthogonal sounded different than the diagonal connections (switch in pic...
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    Closed: Re: Broken 240/120 switch on Transformer

    Well, I put the Black/Green together and the Blue/Brown together and then plugged it in. It was silent and then a loud "pop" and I unplugged it. I guess it is all over.
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    Closed: Re: Broken 240/120 switch on Transformer

    It should be the green/black and the blue/brown like you said. I tried it the other way before posting and the two opposing magnetic fields were generated (i.e. it didn't turn on). I wanted to check...
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    Closed: Broken 240/120 switch on Transformer

    After soldering together a bridge rectifier to make a 12vdc power supply from a 120/240vac transformer, I was having trouble getting anything to happen once I plugged this in. It turns out the...
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    Closed: Re: Simple 120VAC to 12VDC Project

    Can I use a C1010 in place of the rectifier? I am looking at a pile of old parts looking to reuse something.

    never mind. I found the data sheet.
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