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  1. D

    Input Hum - Yorkville Amplifier

    If you do not have a scope you can get Zeitnitz freebe which turns your PC into a scope, spectrum analyzer, tone generator. But you have to protect your sound card inputs to make sure you dont blow up your PC audio channel. Its good for audio freqs. Also make up a 10:1 probe. Google "diy 10:1...
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    555 monostable on power delay

    Its called block language. The program, mBlock, takes your block configuration and generates Arduino code. Its great for doing quick small projects, and for visual learners a super tool. I use C and block languages, and can generate a solution much faster for smaller projects than I can in C...
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    Input Hum - Yorkville Amplifier

    Are the traces connected to their respective traces, lower left and right : Is that C34 between the two inline horizontal; points ? Where is it in schematic ? With inputs both channels grounded, what is the DC and AC value of the outputs of each of the 3 opamps show : If you have a scope...
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    Problems with my school project Automatic ON OFF lamp using LDR and MOSFET

    What is your Vgas of the MOSFET when you think it should be off ? I am in agreemen with all the safety comments. I would bet if I take a poll of the group we would all like to be placed on your end of life will. Tell your lab mates to stay a few meters away when you are working on it. :)...
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    555 monostable on power delay

    Its called block language. The program, mBlock, takes your block configuration and generates Arduino code. Its great for doing quick small projects, and for visual learners a super tool. I use C and block languages, and can generate a solution much faster for smaller projects than I can in C...
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    555 monostable on power delay

    Here is a first pass cut using block language to do the design. Takes 8 pin dip + interface circuit to measure power V you use to trigger event. As simple as a V divider off DC if thats what you have. Regards, Dana.
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    555 monostable on power delay

    One thinks of the following : 1) There should be a V for which action occurs at that value when > and when >= What is that V ? 2) Brownouts should not affect logical operation. 3) Pulse generation / time delay should have some level of T and V variation protection. 4) Pulse generation...
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    Identify Vintage International Rectifier Part?

    Do a reverse image search with Google. Regards, Dana.
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    small transmitters

    Some questions : 1) What frequency ? 2) What modulation will be used ? AM, FM, Digital......? 3) Power level desired ? 4) Will you use an antennae ? Regards, Dana.
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    Input Hum - Yorkville Amplifier

    Hum can also be a poor ground connection in line plug. Also a poor soldering joint that has created a high Z parasitic pickup point. Connector joist as well on PCB. Helps to have an inspection scope or a magnifying glass to do the inspection. Additionally ground shield on audio cables no...
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    Digital Input output observing rise and fall time

    https://www.analog.com/media/en/training-seminars/seminar-materials/time_domain.pdf https://pearl-hifi.com/06_Lit_Archive/02_PEARL_Arch/Vol_16/Sec_53/Tek_Circuit_Concepts/Probe_Circuits_11_69.pdf The above might help. Regards, Dana.
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    Digital Input output observing rise and fall time

    What is the oscilloscope you are using, model number ? You using 10X probe or 1X ? 10X preferred due to C loading of probe. https://download.tek.com/document/02_ABCs-of-Probes-Primer.pdf Difference between probe set for 1X versus 10X Regards, Dana.
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    Step Down Bypass

    Short answer is no. This would potentially dump current into the output of the converter. No predicting what it would do. A Schottky diode in output of converter then tie that to bypass switch output and load should work. Note consult datasheet for converter, if it needs a minimum load to stay...
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    Tektronix 465 oscilloscope with garbled display

    Lots of video repair examples here : https://www.youtube.com/results?search_query=tektronix+465+sweep https://www.youtube.com/results?search_query=tektronix+465+power+supply Regards, Dana.
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    I want to make a speed limiter for my motorcycle

    You cannot switch the coil directly with Uno. Post the wiring diagram you have for the bike, and its maintenance manual if you have that. You can consider coding using block programming. mBlock takes your block configuration and generates Arduino code from that. The above code is basic...
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    Analysis of a Power Circuit

    Between A and B you have a Zener diode, that sets that V. R3 sets Zener current. Rest of circuit a FW rectifier fed by line and a filter cap on its output. Suspicious C2 D2 connection not complete as drawn. Should be more like :\ Regards, Dana.
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    I want to make a speed limiter for my motorcycle

    Some questions : 1) Do you know how to program, in C or any language ? 2) Have you done anything with the UNO board ? Interfaced or programmed it. 3) The forum helps people help themselves. So show your first effort, or discuss what you have read/learned/tried on your own ? Regards, Dana.
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    I want to make a speed limiter for my motorcycle

    Ball valve based constrictors would allow max flow when fully open..... Regards, Dana.
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    I want to make a speed limiter for my motorcycle

    Basically you sense RPM by looking at a plug wire, loosely coupled as in video, or the coil. If you turn off ignition the bike would be herky jerky, not a nice ride by any means. Unlike what happens when you close down a throttle and bike slowly loses speed. A "smart" approach would be a...
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    I want to make a speed limiter for my motorcycle

    Your bike use injection or carburation for intake ? Here is one blokes approach - Regards, Dana.
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