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kcraske

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Interested in retro clocks and time itself

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  • Designing a 555 Timer on Discrete Elements

    Discrete components. Love it.

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  • How to Make Analog Clock & Digital Clock With Led Strip Using Arduino

    Looks promising and I like clocks so had a quick look and got confused. The code looks for button presses and rotary positions yet the circuit diagram does not have these components. Plus I cannot see how to set the initial time. As I have already built a clock with the led matrix used I thought it would be easy to change the code and add the led strip to make it more interesting.

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  • Most Efficient Off-Grid Solar Inverter in the World

    Wow, I'm trying to get my head round the theory however from an electronic point of view what have I missed. As the sine wave is created from successive integers and there is no filtering or shaping why does it not produce a stepped sine wave and if it does are there harmonics flying around they place? Perhaps I should have a look at the schematicLooks like some keen PCBs.

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  • USB Variable Voltage Power Supply

    Being one of the, shall we say, older variety of person I find it refreshing to see a project which uses transistors, even the good old astable. Whilst there is nothing wrong with software based projects I feel this is 'electronic' not a hybrid.Thanks.

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  • kcraske commented on MikeTheMaker's instructable Torg
    Torg

    This is fun. Great detail. Really like it. And I just had to look up the film. Yes, it's bad. So bad you have to watch it. Thanks.

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  • Arduino Controlled Touchscreen Lightswitch

    All there. Thanks for the interesting project

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  • Arduino Controlled Touchscreen Lightswitch

    Can we have a few details. Cannot see how this works and the relay is missing from the schematic.

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  • DIY Solar Powered Automatic Street Lighting

    A simple well executed idea. Just what I am looking for.

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  • Component Impedance Using Complex Maths

    That takes me back to 1974 with my head trying to get round such calculations. Mr Bell and Mr Matley. Next brain scrambling maths problem.... calculus.

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  • Digital Clock But Without a Microcontroller [Hardcore Electronics]

    As an older contributor I like to see projects which do not involve software. This one can truly be defined as an electronic clock. Great.

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  • kcraske's instructable Cube Aid's weekly stats:
    • Cube Aid
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  • DIY Professional 18650 Battery Pack

    This is just what I am looking for. I am unclear however about the BMS module. Suppose I put 3 cells in series, to charge them do I use a charger with an out our just above the series voltage i.e. just over 12v or can it be lower or higher? Thanks.

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  • DIY Yihua Soldering Station

    When doing long soldering jobs a temperature controlled iron is vital. Stops the handle getting too hot plus quick recovery time. Commercial temperature controlled soldering stations cost a lot of money and this is such a cost effective solution.

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  • Jet Propelled Radio Controlled Duck

    If it looks like a duck, swims like a duck, it could be a jet propelled duck. Would love to see this on my local boat lake. Brilliant

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  • Program Esp -01using Arduino

    Thanks for clarifying that.

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  • Program Esp -01using Arduino

    Just a thought. In the connection instructions, should they be connect Rx to Tx, and Tx to Rx?

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  • kcraske commented on WilkoL's instructable Aura Remover
    Aura Remover

    Really good. In Ireland, Brian O'Brian a well known scientist and leprechaun found an aura at the end of a rainbow. He has a Facebook page.

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  • 8x24x8 RED GREEN BLUE LED CUBE

    Thank you so much for your time. Yes I can see that, good idea. I want to make sure I understand as much as possible before launching in. You must have spent hours in this project so I am sure you understand that as this will mean I will be investing a lot in terms of time and a bit of money I don't want to get stuck. However I think I'll now have a go at programming the ESP-01S ESP8266. First steps.

    Thanks for that. I'm not questioning your board works. From looking at the schematic, that would work as well but it appears that the LEDs are 'mapped' differently on the schematic compared with the board layout. I assume then that the effects would not look the same. My problem is that I no longer can produce my own PCBs, I used to but as I often need double sided boards I went down the route of using Chinese suppliers. If I am correct about the different mapping, I assume if I reverse engineered your board to produce the files, rather than use the schematic, all would work. Any help gratefully received. Winter is approaching and soldering all those LEDs would while away the dark evenings.

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  • Mini High Voltage Jacob's Ladder

    Strangely I saw the component on AliExpress only yesterday and wondered about a Jacobs ladder. Now I know it works I'll get one. Always wanted to build one but getting the high voltage transformer now if difficult as the usual way was to use neon sign transformers. These have been replaced with solid state power supplies which do not work in this application.

    Perhaps you should report on the results of the other devices

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  • kcraske commented on Geeks_100's instructable Semi_conductors
    Semi_conductors

    Really think your explanations are good. Send me back to my study days, many years ago.Would you like to look at your explanation of a npn bjt where you say 'That is when NPN transistor is ON when its base is pulled low relative to the emitter.'. Is that correct?Just a thought. I liked your article on LEDs as well.

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  • An LED Clock Without a Micro-controller

    As I like clocks I read anything to do with them intently, looking to understand how they work etc. Unfortunately with this article, as the explanations are actually images, the links to further reading do not work. Any chance of an update.Still want to build this.

    Brilliant. Thanks. 1 step closer to an order from AliExpress and JLCPCB. Such a pity local suppliers are so expensive.

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  • 8x24x8 RED GREEN BLUE LED CUBE

    I have to admit defeat. Wanting to build this I started to design a PCB and it very soon became aware that I could not achieve the neat layout of the board on the article. Closer inspection shows that the board does not correspond to the schematic. For instance, if I have got it right, the board connects pin 1 of the ULN2803 to pin 7 of the 74595. However the schematic connects pin 1 of the ULN2803 to pin 15 of the 7495. The only way I can start to achieve something near the neat layout is to place the 7495 on the outer side of the board, which clearly is not done.Totally lost, wondering where I have gone wrong.

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  • kcraske commented on drtonis's instructable Analog Electronics Clock
    Analog Electronics Clock

    Actually MikeB, I would not allow micro-stepping hands as being analogue. Sweeping hands are needed. I might allow a bit of poetic licence on that one. Time is actually analogue, digital clocks are counters that cannot count. 55,56,57,58,59,100,101,102. And insert a decimal point to suit.

    The display is digital in this clock. Analogue means continuously variable. The display in this clock is not continuously variable but changes in increments, in this case every second. A 'true' analogue clock has a display which continuously changes such as a motor driven (not stepper motor) clock.Would not a better title be 'Digital clock, no microcontroller'. In any case, I might still build it to add to my collection of various electronic clocks I have built.

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  • 8x24x8 RED GREEN BLUE LED CUBE

    I would be grateful if you could just clear up something for me. On the LED cube base PCB you show a connector on each side. These seem to be connected to the anodes of the 8 layers. Do you need 1 at each side or have you included both to make the boards symmetrical. The other possibility of course is that I have not understood something. I am really wanting to construct this.Thanks

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  • DIY AIR IONIZER With a Simple Voltage Muiltiplier (220V INPUT 7800V OUTPUT)

    Wow! I remember a similar design in an electronics magazine years ago.May I make a few suggestions. Firstly a warning. This circuit is potentially lethal as you are dealing with the mains. Secondly the electronics should be well protected from prying fingers. Thirdly install a couple of 1M resistors between the output and the discharge needle to limit the current should the needle be touched. I suggest 2 X 1M rather than a 2M as the resistor has to be able to withstand the high voltage and using 2 resistors shares the strain so to speak. Lastly, you can replace the single needle with a gun barrel cleaning brush. This has dozens of fine pointed needless which increases discharge.You have reminded about this and maybe I'll have to make it.

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  • kcraske commented on drtonis's instructable Analog Electronics Clock
    Analog Electronics Clock

    Fantastic. It's so good to see a clock without the microprocessor. Way back when I was at my last year at school when I was 18 I built a 4 digit clock using the new thing in electronics, TTL logic. The time base was the mains frequency and the display, Nixie tubes.Really like your clock and might give it a go.

    Fantastic. It's so good to see a clock without the microprocessor.Way back when I was at my last year at school when I was 18 I built a 4 digit clock using the new thing in electronics, TTL logic. The time base was the mains frequency and the display, Nixie tubes. However, is this design still a digital clock as the display is not analogue?Really like your clock and might give it a go and I see you make it easy by making the Gerber files available. Great.

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      • INTEGRATING ARDUINO INTO PLC SYSTEM
      • PCB FOR INTERACTIVE MODULE 8x8
      • ARDUINO™ "HACK" PLC SIEMENS™ THROUGH LAN/WIFI INDUSTRIAL ETHERNET NETWORK
  • 8x24x8 RED GREEN BLUE LED CUBE

    Certainly I would relish the challenge of construction. I would design and have fabricated pcbs, something I have done many times. However, I just do not understand the software. Sorry for a simplistic question. If the software on your GitHub is downloaded to the ESP-01S ESP8266 do you get the effects on the video?I fail to see the use of such a device other than its WiFi capability which I do not see how that function is used.

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  • 8x24x8 RED GREEN BLUE LED CUBE

    An amazing project. I would say like to build this and the hardware would be within my capabilities. The software however, I would not know about Great work.

    An amazing project. I would like to build this and the electronics hardware would be within my capabilities. The software however, I would not know about so looks as if it is a non starter for me.Great work.

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  • Green Power Bank to Help Save the Planet !

    Wow, an excellent detailed build description plus it has allerted me to a product I would like to build.I note your comment about potentially overheating the connector when soldering the diode to it which could distort the positioning of the pin. My trick for this is to plug in the corresponding plug in it when I solder, this keeps the pin central if plastic momentarily gets soft.

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  • kcraske commented on webphotos's instructable LED Bulb Dimmer
    LED Bulb Dimmer

    As a supporter of standard circuit diagrams instead of fritzing, yes I am old, I like this project. You can see what is going on.Could I suggest you look at the led circuit symbol. It looks to me like a symbol for a sender and also if you just replace the symbol with that of a led, would it not be reverse bias so not light? Or have I missed something.

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  • kcraske commented on matt1251's instructable Realistic RC Car
    Realistic RC Car

    I like how this demonstrates that a large project can be broken down into parts, each of which comparatively simply yet the end complex.One thing I must have missed somewhere. Where is the RC aspect.

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  • Kenwood Chef A902 A904 AC Motor Speed Control Module

    Really good to see a rundown on keeping these machine going and going and going.We have one over 30 years old and it failed. Burnt resistor was the culprit. It was then that I discovered the speed control. It is cleaver that they use the mechanical/magnetic system as against using a standard potentiometer speed control as I am sure a potentiometer would go noisy and fail after a few years.I replaced the burnt out resistor with a higher wattage one, new triac and new mains rated capacitor. Works a dram again.

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  • DIY Touch-less Door Bell Without Arduino!

    It's great to see a project which is useful and uses good old standard components. Another plus for this is the highest reason for failure of electronics is contacts and switches. This should make the doorbell more reliable.As a thought, is the relay really necessary. If the 'dead' end of the push button is identified and the emitter of the transistor connected to that, and the collector to the 'hot' contact of the switch, when the module triggers the transistor shorts the push button and the bell rings. You definitely would have to Chevy the voltage usually on the switch and check the transistor is capable of handling the voltage. Maybe?

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  • Large Capacitor Spark Demo - 170V DC Charger

    Firstly it's always good that people share their creations.On this one I think you should put a serious warning about connecting a project directly to the mains supply. Secondly, in some countries the mains is not 120v ac. Where I live it is 230/240v ac thus peaking to nearly 340v. This needs to be taken into account regarding your calculations.Yes there is some current limitation in the circuit but would you not consider that 170v is potentially lethal let alone 340v

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  • Diy Short Circuit Protector

    Like the video but can you give an explanation as to how it works

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  • How I Made the Most Advanced Flashlight Ever

    Really liked this. It demonstrates how the end result is comprehensive but built from simpler individual sections which come together to form the whole. I was particularly interested in the phone charger output section.I use jlcpcb. Always found them good. On your list of software I would add designspark PCB. It's free, no limitations and very comprehensive.

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  • kcraske commented on ujjaldey's instructable UTixClock
    UTixClock

    I love clocks and have built Nixie, VFD and led matrix ones. I like this project as it is so well documented and a bit different.Interestingly, and some comfort to me, you found the hard part was the enclosure for your project. That's always my problem.

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  • Arduino Nano Mini LED Matrix Clock

    I love clocks so had to make this. At first things did not go well so had to do a bit of digging and understanding. I think that I might do an instructable to clear up a few points about this project.However all went well. The picture shows my breadboard clock using an Arduino uno to get it working. Now its down to make things neat and transfer to a nano.Love its simplicity.

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  • DIY PowerBank From Old Laptop Batteries

    Your circuit shows all the cells in parallel so the voltage would be the same as 1 cell but with a capacity of all the cells added together. However, of one cell is slightly below the spec of the others the pack is out of balance. Surely you need to have a charge balance charger to make sure each cell is correctly charged.

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  • Arduino Nano Mini LED Matrix Clock

    If I could make just one suggestion. The schematic shows the display as 4 seperate modules whereas the supplied component is one module with 5 pins brought out at one end.

    If I could make just one suggestion. The schematic shows the display as 4 seperate modules whereas the supplied component is one module with 5 pound brought out at one end.

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  • kcraske commented on kamini123's instructable DIY CIRCUIT WORKBENCH

    55 years ago the headmaster of my school introduced me to simple electrical circuits like a battery, bulb and switch. That sparked an interest for life. Good instructables.

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  • A really neat, simple to construct clock. I love clocks.

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  • A very neat project, looks good when finished.Could I suggest you give some details about how the BMS is connected to the batteries and how you recharge the pack when finished. A schematic perhaps.

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    • VFD Digital Clock With Low Component Count.
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  • kcraske commented on mrwolfe's instructable Eco-friendly Firelighters

    This is a great idea. We have a wood burner stove for heating in the winter and at the beginning of the heating season purchase a case of firefighters to use throughout the winter. This year we ran out. Wish I had seen this before.Of course the only comment is burning things is not very eco friendly but we live in a world where sensible compromises have to be made.

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  • kcraske commented on ChristineNZ's instructable VFD Trilateral Clock

    Really like this. I like to see electronics in action so the novel display looks eye catching. Just one small point. The heading says 'VFD Tri.............'. The display tubes are not VFD (vacuum fluorescent display) but more akin to tubes commonly called nixie.

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  • kcraske followed tools, gadgets, clocks, soldering and 13 others channel
  • You might like to consider changing the title as there is such a component as a thermocouple and it works on a totally different way to a thermistor. But it's a good example of how to use a sensor with the Arduino.

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  • However, where have I gone wrong. If each led drops say 2 volts, then 3 in series drops a total of 6 volts. For a 9 volt supply, 6 volts are dropped in total by the 3 LEDs in series we now need to drop 3 volts across the resistor. For a current of 0.02 Ampers and using V/I =R , 3/.02 = 150 ohms. The 3 LEDs in series each dropping 2 volts being the same as a mythical 1 led which drops 6 volts?

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  • I agree this is a much faster method than just dunking boards in ferric chloride. I would say always use protective gloves irrespective of single or double sided boards and certainly no where near any thing of any value. Ferric chloride seems to magically get everywhere.One thing that puzzles me. You say chlorine is given off. I did not think this was the case. It smells but I did not think it was chlorine nor can I see that in the reaction. Perhaps I'm wrong.

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  • This reminds me of many years ago when I had a calculator which used RPN. You might guess that I would be classed as old now. I think one of Sinclair's calculators used RPN.Learning RPN was useful years ago as I learnt computer programming using a language Fortran4.

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  • kcraske commented on medhatko's instructable DIY 10W LED Lamp

    Good ideas about the assembly. The idea that it is 10watt needs to be expanded I think as although each led consumes 1watt hence 10 is 10 watts, the amount of light emitted varies. Some leds emit more lumens per watt than others and it is the lumens which we see.

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  • I do not have a rubber duck. Can I use a plastic dog instead ?

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  • Really like this project. I particularly like the inclusion of a standard schematic as well as the Fritzing. I know by using the latter people can just copy exactly where you place the components and all will work but if you want to understand how things are connected then older people like me sometimes like a schematic.

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  • I think this is an excellent project. It is particularly good as it demonstrates how what looks like a complex end product can be broken down to smaller understandable parts to be put together to give an end result.

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  • Tutorials such as this are really good considering the increasing number of smd components. Especially as some components are now only available as smd.

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  • Your calculation of the resistor needs a bit of refining as it assumes the use of a voltage around 5v. Your idea of generalisation is fine but I think you have got a bit confused when it comes to where you give the 1.8v. This is the volt drop that a red LED has, other colours vary. Limiting the current to about 15mA is a good generalisation. Now the calculation for the resistor. Let's say you have a 5v supply, The LED drops 1.8v so we need the resistor to drop 5-1.8 that requires 3.2v Using your ohms last v/i= r gives 3.2/0.015 = 213.333 so a 220 ohm resistor would be fine.Now look if you use a 2.4v supply, 2 batteries. The calculation now becomes 2.4 - 1.8 = 0.6. The resistor 0.6/0.015 = 40 ohms, much smaller. Looking again using a larger power supply say 24v. The calculation now becomes…

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    Your calculation of the resistor needs a bit of refining as it assumes the use of a voltage around 5v. Your idea of generalisation is fine but I think you have got a bit confused when it comes to where you give the 1.8v. This is the volt drop that a red LED has, other colours vary. Limiting the current to about 15mA is a good generalisation. Now the calculation for the resistor. Let's say you have a 5v supply, The LED drops 1.8v so we need the resistor to drop 5-1.8 that requires 3.2v Using your ohms last v/i= r gives 3.2/0.015 = 213.333 so a 220 ohm resistor would be fine.Now look if you use a 2.4v supply, 2 batteries. The calculation now becomes 2.4 - 1.8 = 0.6. The resistor 0.6/0.015 = 40 ohms, much smaller. Looking again using a larger power supply say 24v. The calculation now becomes 24 - 1.8 = 22.2. The resistor 22.2/0.015 = 1480. Very much larger.Looking at the calculations you can see that calculating the voltage the resistor has to drop is more important when the power supply is just a bit bigger that the volt drop off the diode. If you use say a blue LED, this has a volt drop off about 3.3v so do the same calculations but use 3.3 instead of 1.8. An interesting point. If you use 2 batteries then you can light a red LED. But if you have a blue LED, the volts are only about 2.4v but the LED drops 3.3v so it would not light. Also, if you use a higher voltage you must be careful that the resistor can handle the power when it drops the voltage. In the last case, the power is v x I = 22.2 x 0.015 = 0.33 so you have to use at least a resistor variable of handling a third of a watt. As the power supply volts go up, so the value of the resistor goes up and also the amount of power the resistor has to get rid of goes up.Handy things LEDs, but you still have to do the maths.

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      • How to Install a GPS Monitor
  • An excellent description on how a circuit is developed by looking are the requirements sequencialy and adding the appropriate components as the project progresses.As I am in the middle of wanting to control motors using and Arduino I will find this useful.

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  • kcraske commented on DIY ZE's instructable Drone powered boat

    Love it. Thinking out of the box to use something in a way it was not intended.

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  • I just love anything to do with time and clocks. Thanks.

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  • An interesting idea which I would like to experiment with. However, right from the start there is a comment that light is not a possible particle but a wave and from there on everything is based on this statement.When dealing with light there is nothing wrong in dealing with the wave like properties of light but it is also shown the light also displays properties associated with particles. I would say that if you are to present an instructable in a scientific manner then you have to be accurate.Having said that, I still want to try this out.

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