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    Motor to drive a metal disc

    Hi all. I am busy working on a project that will turn a disc, just a plain steel disc with a rod attached to it to simulate a steam train's piston action. I am now looking for the right type of motor for this. The disc is approx. 1 kg, possible less. I want to know if a stepper motor might work...
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    LAN LED

    Hi All! Ante, if you're reading this I might have found a solution to that other laptop project. Can anyone please tell me if it's possible to build a circuit that can be connected in parallel somehow with a normal ethernet cable, and then drive an led that blinks on transfer? Like the...
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    16V 3.5A from 12V battery (17Ah)

    Hi all. Can someone please help me. I have an old laptop that I want to make REALLY portable. I want to take one or two 12V batteries and run my laptop from it. The problem is that the laptop needs 16V at 3.5A. Do you have any suggestions on how I could do this? I'm not expert but I was...
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    Power car amp from PC PSU

    Hi all. Can anyone please help me with the following: I want to power a car amp from my mains power supply (220V, 50Hz). I have read and searched around, but haven't found anyone that could really tell me exactly how to do this. My idea was that I take a powerful PSU, about 600W or so and strip...
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    Telephone headset using PC headset

    Hi All! I haven't been here for a while! How is everyone doing? I just want to say thank you to everyone who posted replies to all my other questions and topics I had! I really appreciate it! I have a new, small project that I would like to build. I have searched for a while now but didn't...
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    DC digital ammeter

    Hi All! Just wanna say thank you to all that have helped me on the other project for the power supply for the amp. This is actually a supplemetry post for that amp psu. I was wondering if anyone has some ideas how I can build a 0 - 60A dc digital ammeter because I want to find out exactly how...
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    Power supply for car amp

    Hi all! It's been a while since I last posted here. Thanks for everyone that helped on my previous designs!!!! Now, I have yet another idea that I want to build. I have been searching around the net for a car amplifier psu but  to no avail. I found a psu that uses TIP transistors with a 24V 35A...
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    Digital 7 segment clock with trigger

    Hi All! Thanks to all for your input on my previous project's questions. Now I have a new one, very small actually and I'm sure a lot of you will be able to solve it within minutes. Speaking of minutes, I would like to build a digital 7 segment clock, from a kit or whatever, then have it...
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    Touch sensitive pad

    Hi All. I am really intereste in building a touch sensitive controller for my room. But, I want to make it look awesome. I was wondering if it is possible to make a circuit that can pick up touch through glass or plexiglass or similar? Does anyone know where I could look for a circuit or anyone...
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    Power supply for amps

    Hi Everyone! This is my first time posting in this forum! I would like to know if anyone can please help me determine a few things about two power supplies that I want to build for two amplifiers. The first amplifier is this one: http://www.kemo-electronic.de/en/bausaetze/b086/index.htm I...
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