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    Naze32 flight controller Repair

    Certainly and in many instances the former is the only concern. However, many feel they are responsible to inform some whom for whatever reason, seem oblivious to the dangers that are present. If you take offence at advice such as this, so be it but it will not deter me from doing the exact same...
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    MCP23017 with raspberry pi

    What is the relay board? 0 is low but can be active low result depending on what is connected on the output, how you have the program and how you connect the circuit.
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    Learning Project Help - Converting a full sized solar panel

    Might be a good idea for you to do some reading on solar panels and their characteristics and requirements for an output controller. One is an open circuit panel can deliver in excess of 80 v dc which can give a nasty wack or worse.
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    Additional rectification necessary for Tom Tom unit?

    Variation in supply should already be taken care of when you say it is designed for motor vehicle. Don't know why you imagine extra "diodes" would be required. Only thing I can imagine may cause a problem is noise from the ignition but with this you will have to " suck it and see". Motor...
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    6kw solar design from used equipment design.

    mmmmm....
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    Wiring Question

    Will have to be a good ground otherwise you might end up getting a return path through the outer coax shield on the antenna. Best to check with say a 12v test lamp, something that draws the same or near the same as your radio and see. If you use a multimeter it may show as ok but it might become...
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    Looking for some assistance with a 555 one shot controller?

    I think Alec might have this as it is not a 555 timer but a cd4541. Where did you get it? ( link?????)
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    mpf102 duds

    They must make a LOT of boo-boos.
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    A dedicated chess computer, Mephisto Munchen Lyon

    Seems to be some details here on different models etc. http://www.chesscomputeruk.com/index.html
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    Naze32 flight controller Repair

    As the saying goes, if you know so much, how come you blew the crap out of it in the first place? Point being, these units are very complex devices. A surge from a short like described can do irrepairable damage to sensitive on-chip devices not to mention cause the programming to become...
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    Looking for some assistance with a 555 one shot controller?

    Photo 3, common is centre and the right side shows a contact normally closed. That's why they call it n/c, normally ( without being activated) closed. Operation of the relay state is usually via jumpers although the above is a simple fix for you. Did you read the instructions as they are...
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    Naze32 flight controller Repair

    Actually, I do but in this instance you mentioned using it as a back-up unit so I assumed from that, that you intend putting it back into service so-to-speak. This is the part I find as a bad move as you could destroy the craft, or worse, hurt someone. Don't agree there I'm afraid.
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    Naze32 flight controller Repair

    As you have already found the hard way, these are far too complex to go "playing" with. I would bin it as it obviously would be unreliable at best.
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    RF enabled motor controller

    Seems you were asking the same a few days ago.
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    Bluetooth Doorbell

    Hook the doorbell button in series with the headphones.....button on, headphones off.
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    Replacement Ribbon Cable suggestions (HP 97 Calculator)

    Some 40 pin on Ebay, perhaps a slice with an xacto knife. Take your pick at length. Forward reverse explained in one of the alternate pics section...
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    4017 IC

    Like this for $1.00???? https://m.ebay.com.au/itm/LED-Chaser-Flowing-Water-Light-NE555-Module-CD4017-Circuit-Driver-Cycle-Parts/232804406155?_trksid=p2504926.m5232.l9681
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    Inserted 9v battery wrong way into fire alarm, expected damage?

    Any worth a cracker will.
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    Inserted 9v battery wrong way into fire alarm, expected damage?

    Never saw warranty cover reverse connection before.
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    Xbox One S Controller Repair

    Looks like there might be 4 points requiring re-attachment. Do you have a photo of the underside of the plug/socket that was torn off. Surface cap could be tricky.
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