Skip Navigation
Is there such a thing as an automotive relay with no resistor?
  • Not sure I understand the problem fully, but you want a circuit to operate when you push the horn button, without affecting the horn operation.

    Chances are the relay coil is drawing to much power.

    Have you thought about adding a transistor to your circuit? It would draw very little current from the horn circuit but should allow you to drive something else. - such as your relay. It would of course require you to do some electronics.

  • I have an interview tomorrow morning, any tips, suggestions advice?
  • Remember that you are also interviewing them. They won't expect you to know all the answers, but will want someone that they can work with. If you can, answer questions with the STAR method (situation, task, approach, result), but don't waffle. You can use one piece of experience in a variety of ways: teamwork, research, urgent deadline etc.

    It's ok to say that you are nervous, they should try to put you at ease.

    You may be asked 'trick questions', these are not usually to to you up but to see how you work an unknown problem. There is no right answer. Not knowing stuff is ok. Not being able to think up a plan is less so.

    Remember whatever the outcome, this is really useful experience. See if you can get a site tour, ask about the tech used... You can then add this to your knowledge for later. In my experience, industry is frequently several years ahead of academia so you get a good chance to understand the real world.

  • What is the best type of smart lock?
  • I'd go with a good quality traditional key lock fitted properly in a good door and frame. Security isn't a single point task, it depends on many things so think like a bad person and do what you can to make your property a harder target than your neighbours.

    A good lock on a bad door doesn't work, neither does a bad lock on a good door. Everything needs to work together. If you're likely to lose your keys or many people need access a smart lock may be an idea, but good probably isn't cheap. If it's just you and you can keep your keys safe, then I think tried, tested and simple kit is good.

    Ultimately though, as ever, it's your risk assessment based on your needs.

  • What is the best type of smart lock?
  • If you watch lock picking lawyer, you may as well just leave it open. Most smart locks seem to prioritise convenience over security. -possibly check that your insurance is happy with a smart lock.

  • Good right angled board to board connectors
  • Ermmm.... If you use several pins to get the current rating, what happens if one of the pins fails or gets corroded? Won't you risk generating heat? Think I'd prefer nice big connectors for the power and to keep the data lines safely segregated. Depends on your needs and design I suppose.

  • How can I improve my handwriting?
  • Practice writing slowly and with good form. Write regularly, give yourself practice pieces. At uni you will be writing FAST, so it'll get worse if you don't keep disciplined.

    Alternatively, learn to touch type, and type any work you need to hand in. - if your handwriting is so bad, you may want to make your notes legible to yourself for revision.

  • Long term storage of LiPo device

    I want to store a battery powered device long term (decades) as a reference article, it will never be switched on or charged again. The problem is that it contains a small LiPo battery that will be very hard to remove.

    Is there likely to be any significant risk I need to worry about? Once depleted will the battery be relatively inert?

    4
    Those of us that have undergone autism-specific therapy or training to learn to socialize better, what lessons did you learn?
  • This is very interesting. Have you considered studying social engineering? - I've found SE techniques quite understandable to help form a process to deal with people in a 'useful' way. Many years ago I was sent on a positive influencing course via work and discovered that most NTs can be quite easily manipulated with a few simple tricks. In the end I stopped using them as it felt unfair.

  • Suggestion for mounting ServoMotor on the door for Automatic Door Unlock with ESPHome on ESP32
  • While I'm not adverse to home automation, is this something you need in your life, or just want? I like my perimeter security too be simple and tight, extra complications make the security audit much harder.

    Will your insurance stand up to home made remote control unlocking?

    To answer your question, place the servo in a suitably large enclosure and practically any adhesive should work, e.g. 3mM command strips or even velcro or double sided sticky. When confident that this is what you want, use a screw.

  • Does anyone speak hairdresser? I need help communicating.
  • I've avoided the conversation entirely. Ever since the pandemic I've done my own hair with clippers. Made a good enough job of it, even if I've sometimes needed to do a small adjustment the next day.

    For a simple style it's not that difficult if you take your time.

  • Blue hours
  • It's a long time since I had one that age but we clearly noticed when the kids had an upgrade and behaviour changed. I'd put it down to him enjoying his new capabilities and being to excited to sleep. Don't think it's a problem, just roll with it, it's not as if it's a toy you can take away!

    Have fun, it doesn't get much easier, but it does get different.

  • Any tips to help a scientist become a better programmer?
  • All the other comments are great advice. As an ex chemist who does quite a bit of code I'll add:

    Do you want code that works, or code that works?! It's reasonably easy to knock out ugly code that only works once, and that can be just what you need. It takes a little more effort however to make it robust. Think about how it can fail and trap the failures. If you're sharing code with others, this is even more important a people do 'interesting' things.

    There's a lot of temporary code that's had a very long life in production, this has technical debt... Is it documented? Is it stable? Is it secure? Ideally it should be

    Code examples on the first page of Google tend to work ok, but are not generally secure, e.g doing SQL queries instead of using prepared statements. Doesn't take much extra effort to do it properly and gives you peace of mind. We create sboms for our code now so we can easily check if a component has gained a vulnerability. Doesn't mean our code is good, but it helps. You don't really want to be the person who's code helped let an attacker in.

    Any code you write, especially stuff you share will give you a support and maintenance task long term. Pirate for it!

    Code sometimes just stops working. - at least I'm my experience. Sacrifice something to the gods and all will be fine.

    Finally, you probably know more than you think. You've plenty of experience. Most of the time I can do what I need without e.g. classes, but sometimes I'll intentionally use a technique in a project just to learn it. I can't learn stuff if I don't have a use for it.

    I'm still learning, so if I've got any part of the above wrong, please help me out.

  • What are some good places to visit in Scotland?
  • There's a lot of Scotland, and don't underestimate driving times. Argyll is good, but can be rather wet any time of the year. Going around now you should be safe from the midgies. Recommend getting onto some of the islands too, and boat rides are always nice. Kerrera is a lovely little island just by Oban. It has a very atmospheric castle, though the teashop isn't as good as it was so pack a lunch. If you like a dram, make a tour of some distilleries, each has it's own character. Argyll has lots of archeology & standing stones if that's your thing. There are loads of lumpy bits of you like walking too. Pretty much anywhere is good, tourist hotspot are ok, but try to get off the beaten track once in a while.

    If you're driving, and going onto country roads, please please please learn to reverse.

    If you're lucky you may get to spot some wild haggis, but they're quite rare now. The farmed ones are cute but have a nasty bite so be careful.

    Also don't neglect the borders, loads of history.

    It may not sound your thing, but consider geocaching... It takes you to some interesting out of the way places.

  • New Build

    Do self build watches get the love in here?

    This is my second build, I wanted a more relaxed every day watch with good readability as my eyesight is starting to go. I also fancied a bronze case and will let the patina form naturally. Any scratches, marks or dings will, I think, add character.

    Inside is a Seiko nh36 to give me some options later if decide I need day/date.

    Thought I'd made a mistake with the white hands but now really like them. It's nothing special or expensive but it meets my needs perfectly.

    5
    slate clock restoration

    I bought a slate clock as a restoration project but didn't spot at the time that it had been painted black.

    Any advice on how to remove the paint without causing damage? Will commercial paint stepper do the job?

    0
    InitialsDiceBearhttps://github.com/dicebear/dicebearhttps://creativecommons.org/publicdomain/zero/1.0/„Initials” (https://github.com/dicebear/dicebear) by „DiceBear”, licensed under „CC0 1.0” (https://creativecommons.org/publicdomain/zero/1.0/)RA
    RandomUser @lemmy.world
    Posts 3
    Comments 28