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  • JerryE4 commented on Ritik Bhardwaj's instructable Arduino Ohm Meter With LCD9 months ago
    Arduino Ohm Meter With LCD

    Funny, it was not shorted out! The power wires I had attached had a fault, I dug it out today, after finding my multi-meter had bit the big one, and instead of trying to put batteries in her I simply plugged in the Nano that is soldered onto the board, and she came to life. A bit of messing with my multi-turn reostat, and I am back in business. She is a bit worse for wear, apparnetly she has had somthing heavy dropped on the screen as it has some scars but I can still read the Ohms quite well. Great project, again thanks a million a very useful device indeed.

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  • JerryE4 commented on GreatScottLab's instructable Make Your Own Simple Theremin1 year ago
    Make Your Own Simple Theremin

    Watch a bit of Star Trek the origional series, the Theramin is used in the intro music.

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  • JerryE4 commented on educ8s's instructable Arduino Wireless Weather Station1 year ago
    Arduino Wireless Weather Station

    Easiest way would be to replace the Arduino and NRF with an ESP8266, ready made internet interface and a much more powerful processor.

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  • JerryE4 commented on GreatScottLab's instructable Make Your Own FM Radio2 years ago
    Make Your Own FM Radio

    I am planning on using this as a base to build my little Retro style FM/XM radio system that will sit on a shelf in our Class A motor home, which we spend the winters living in down in Arizona (wow a lot of in's in that sentence.) I have removed the speakers and amp from an old set of PC Speakers, the amp works good and the speakers sound great when removed from that horrid plastic shell that the maker put them in. I plan on building a nice wooden radio case for the set, and use the digital output as outline in this project, plus mount the small XM receiver in the same case, perhaps side by side with the FM display. I also plan to integrate a small bluetooth receiver that I had built into another amp that went bad on me a few years back, I think that can be done with ease looking at t...

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    I am planning on using this as a base to build my little Retro style FM/XM radio system that will sit on a shelf in our Class A motor home, which we spend the winters living in down in Arizona (wow a lot of in's in that sentence.) I have removed the speakers and amp from an old set of PC Speakers, the amp works good and the speakers sound great when removed from that horrid plastic shell that the maker put them in. I plan on building a nice wooden radio case for the set, and use the digital output as outline in this project, plus mount the small XM receiver in the same case, perhaps side by side with the FM display. I also plan to integrate a small bluetooth receiver that I had built into another amp that went bad on me a few years back, I think that can be done with ease looking at the build of the amp. Nice thing about the Amp, it comes with a 120 to 9 volt transformer, so I think I will tap off that and build a 5 volt supply to run the arduino, or perhaps just rectify it and run it off the 9 volts, haven't decided yet, I know most of the Arduino's can run off 9 volts if you put it to the proper pins, but no, I think I will step that down to 5 volts first just to be careful. I think I will do it on a Nano, since I have a surplus of them and they are quite small on their own right. Yes this does look to be a fun project, I can combine my love of electronics, with my love of woodworking to make a thing of beauty that can serve me for years. I hope..... Or maybe I will just build a radio.....

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  • JerryE4 commented on mrstan's instructable Repair Dead COB LED Light Bulbs2 years ago
    Repair Dead COB LED Light Bulbs

    Oh on a side note, those capacitors can hold quite a charge, it is best to short them out before doing any testing,least you get a bit of a surprise when you hook your meter across them.

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  • JerryE4 commented on tutdude98's instructable Portable Power Supply2 years ago
    Portable Power Supply

    Greetings - I have made several of these type power supplies. I have one step up that has 3 18650;s however I always use the built in reostats. Perhaps I will upgrade them with external to make adjustments easier, however mine work fine. I have anothr with 6 18650's that I use to power my 50 Watt LED lights and other high amperage devices. Also built one step down with 3 18650's for lower power projects, mostly 5 volt as many of my devices wish that voltage, the other is usually set to 12 volts. And much like your project I have one that is hooked to an old HP Printer power pack that has 32 volt out as well as 5 volt out. I run that into a box with a step down for the 32 as well as straight 5 volt for those devices. I use that where I need a constant supply based on mains voltage.

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  • JerryE4 followed raspberry-pi, reuse, apple, electronics and 6 others channel 2 years ago