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    Distant Relay Module Circuit Help

    What is the resistor and cap supposed to be doing on your relay output contacts? No need for anything there other than the c/o contacts. Why the extra fuse, no need for that either as main supply would already be protected by a fuse/circuit breaker. Just be aware that in most...
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    Space-efficient control of multiple 12V 3.5A DC motors

    Don't think so. Trend these days is more biased towards the use of brushless in the r/c environment at least. These use supplies of varying voltages but common to see anything from the7.4v to 22.2v (lipo batteries). Don' t suppose you'd consider a change in motors? There can be advantages such...
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    Interesting unit

    Just thought some may be interested ......induction heater unit for $35.00. Maybe experimenters or whatever. Cheers Jorgo http://files.banggood.com/2016/09/SKU202246.pdf
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    Vss vs. Vdd vs. Gnd

    Connections for Vdd and Vss not normally interchangable. This instance shows whomever made the first photo unit perhaps is Chinese maker and Chinese/English confusion set in. Try this diagram for you new unit. I would guess the Vdd on your old one is positive supply and Gnd is negative supply...
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    Vss vs. Vdd vs. Gnd

    Can you show photos?
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    AC to AC relay for Landscape Lights

    Maybe rectify 9v ac and drive a 12v dc relay? A layout circuit would be helpful.
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    Not transistor and weak electromagnet

    Solenoids are not normally driven by pwm. They are essentially a "turn fully on....turn fully off " device.
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    Finding a nano amp transistor for Solar LED Light Marker

    Might be something of interest for you here.... http://www.prc68.com/I/JouleThief.shtml
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    Short distange battery operated(door bell type) alarm

    We do "walk tests" with pir devices in daylight and they work fine right up to the rated 12 metre range.
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    Space-efficient control of multiple 12V 3.5A DC motors

    Perhaps the rc range of brushed speed controllers? May need a different control signal from what you are using (these are ppm) Example here is a fairly wide voltage supply, forward and reverse with around 10A max. Have no idea of the quality($5 ...:eek:) definitely smaller ........ but there...
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    Component

    Looks like Arduino or similar add-on module
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    multiply resistance??

    Ha....found it, or one similar at least. https://www.nostalgickitscentral.com/info/dcmeters.html
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    multiply resistance??

    Arduino would be one way using the map function where one would take your sensor and add another resistor to give a voltage divider. This varying voltage value would be monitored and then fed into an analog input. Mapping involves taking one range of inputs (min-max)and converting into a...
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    Scratching noise on volume button

    CRC, WD40, both have similar cleaning/ lubricating ability. One I used comes with a long thin tube that plugs into the nozzle allowing the lube to be directed into precise locations such as the slot adacent to the terminals on potentiometers.
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    Kokusan Denki Transistor Controlled Ignition unit circuit diagram

    Can't help with a diagram but I have repaired a ZZR750 ignition module. It luckily was a pre-encased unit where the main supply had been reversed and blew out the main switching transistors. The point being that this particular unit design was pretty bullet proof in that respect, so maybe you...
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    Puzzeled?

    Yes, well I wasn't trying to be sarcastic, but rather just trying to show how the signal can be changed by the addition of external influences. Still comes back to trying another Tx though.
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    Puzzeled?

    I would imagine you would have replaced the Tx battery. Other than that, if it is the standard key fob varity, the Tx units normally get quite a rough life, stuck in pockets, thrown on the dash and would be my first instinct to try another unit. Checking the receiver housing etc. for any...
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    Kokusan Denki Transistor Controlled Ignition unit circuit diagram

    So how about any connections, wiring continuity, kill switches, pick- up coils/ sensors and associated wiring/connections, fuse links, supply failures under load conditions? Not " fuzzy" but rather "basic" logic this end.
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    Heating coils with a 9v, why doesn't this work?

    Try doing some basic electrical/electronics 101 as you have no understanding. I'm sure there are millions of sites on Google. What you are attempting is just a dead short.
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    Kokusan Denki Transistor Controlled Ignition unit circuit diagram

    Yours does not work, neither do 2 reportedly "good" units also do not work. Perhaps you have been doing something wrong or do not know what you are doing.
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