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    IR Spectrometer Project: Is This Project Within My Reach?

    Hi Everyone I'm considering a project, and wondering whether you think my approach would work. (I also have to consider expense.) I think that I can make a diffraction grating suitable for mid infrared spectroscopy. I'm thinking of the range between 2.5 microns wavelength and 7 microns. The...
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    I need a really good inline connector

    Hi People I’ve had a project going for the last couple of years that will soon require me to wire up some piezoelectric crystals… ThorLabs PK4FA3H2P2’s to be exact. These devices come with 75mm wires already soldered onto the chip, so my machine will have these wires sprouting out of it. The...
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    The Periodic Egg Cooker

    Hi :) A group of Italian engineers has performed an engineering study on the cooking of eggs, and concluded that the very best way to cook eggs is to alternately boil and cool the eggs on a 2 minute cycle for 30 minutes. Yeah right, eh. Still, their claims have been taken seriously. I think...
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    Price versus quality

    Hi Peeps :) I need to set an analogue voltage to a very fine adjustment. I've been window shopping at Mouser, and Radio Spares, and wherever else I can find good potentiometers for sale. There are many, many pots on sale - and at some amazing prices - a single turn linear pot can cost a couple...
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    Wanted: optics parts from video projector

    I need to make measurements of movements in the order of one micron, or a millionth of a meter. In order to do that I need to get a beam of light to interfere with itself, using a modified Michelson Interferometer (see YouTube). This means obtaining parts whose costs, as new devices, are...
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    The Laugh Machine :D

    Hi :) I have an idea for some fun electronics. It's called "The Laugh Machine". The Laugh Machine is made of 2 parts. There's a microphone, and a 1 second delay and amplifier/speaker unit. To use the Laugh Machine, put it in front of your friend, and switch it on. Tell him to laugh. The Laugh...
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    Wanted: anti-static storage foam

    Hi and smiles to all :) I want to store my ICs on a nice big sheet of "that black foam" that IC's are sometimes delivered on. Conductive stuff, thick enough to put components on both sides... I dream of half-meter square sheets of the stuff... my eyes go all soft and then I must (gaah) awaken...
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    Need a reliable circuit for 4MHz crystal oscillator

    Hi Peeps I'm weeks away from Mouser/RS and need a reliable transistor or TTL circuit for a 4MHz oscillator. I have a good crystal but the circuit I found online doesn't work. If someone out there has invented a reliable version of this wheel, please let me have the circuit :) Mark
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    I need a 350V, 1A PSU

    Hi people I want to play with high voltage piezoelectric transducers. To drive these highly capacitive devices I need a low impedance, stable 350V d.c. supply. I'd like to have 1A of smooth 350V current available. Naturally I remembered *steve* who often said that Google is your friend (but...
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    Magnetostriction.

    Hi peeps :) I'd like to try using the magnetostrictive properties of ferrite to move a tiny table - perhaps 50mm^2. I've seen no practical designs. I'd especially like to hear from anyone with experience in anything similar.
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