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Zenaida posted:A lot of companies will give you free samples of parts. I have a bunch of PICs and a MEMS accelerometer at home that I got just by asking. Some sites even have a sample parts form you can fill out. As a hobbyist, you generally only need one-off parts, so it's a great way to keep your costs down, especially for more expensive bits like sensors and MCUs. This is a good point. There are alot of free sample sites lined from this one= http://www.dutchforce.com/~eforum/index.php?showtopic=13348 Follow the rules and you will get alot of free stuff.
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Jan 10, 2008 22:58
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Mr. DNA posted:I need to control a solenoid from a microcontroller. The solenoid will need up to 1.8A. Is this a suitable MOSFET to use? STM STD50NH02L there is talk on the microcontroler discussion about dc motor switching etc. The same circuits would be ideal for the job of a solenoide too. http://forums.somethingawful.com/showthread.php?threadid=2734710 the spec of the std50nho2 seems a little overkill.
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Jan 17, 2008 20:45
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Astrolite posted:I'm thinking of buying some thyristors from ebay, and I'm having a bit of trouble understanding the datasheets.. VDRM = maximum repetitive peak-off state voltage VRRM = maximum repetitive peak reverse voltage Take a look at http://www.iee.cas.cz/power/gto.htm for more info.
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Jan 19, 2008 13:34
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Squier posted:I am working on my senior year physics project which is a small cyclotron and need some electronics help. I need to create an RF amplifier that is capable of producing around 50-100 watts in the 1-15 MHz range. I haven't had much practical electronics and am hitting brick wall after brick wall trying to design this. So far it seems a push pull tube amplifier would be my best bet but am really lost beyond that. Any help at all would be awesome. Im soon to be building an amp for the sub in my 5.1 somthing around 400w rms. Im not the best with amps so any tested circuits would be cool. ive found this hobby site thats ok. http://electronics-diy.com/ does anyone know of good electronics hobby sites?
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Jan 20, 2008 20:20
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Phlegmbot posted:If I were actually trying to learn electronics from this thread, I'd be so drat confused. LOL its not what you would call and electronics syllabus is it!. How about If someone has some server space we start an Electronics wiki. Unless there is one and in that case it was all my idea. Honest!!!
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Jan 21, 2008 17:14
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I’ve found a video on youtube by some guys that do MAKE magazine. (I've never heard of it) but they managed use a laser printer and an iron to make the tracks for copper clad pcb! They Ironed the Toner onto the clad. http://www.youtube.com/watch?v=urv6jArKp6M&feature=related It looks like it would work really well and the finish was great! I’m going to try this tonight and see how well it works. edit: fixed link The Radiskull fucked around with this message at 10:22 on Jan 22, 2008 |
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Jan 22, 2008 10:19
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Here are some bits ive got to Build an amp.  Just things I had kicking about in my shed. MJ15003 NPN Power Transistor 14 MJ15004 PNP Power Transistor 19 MJ2501 PNP Power Transistor 5 MJ3001 NPN Power Transistor 7 Transformer 30v+30v 530VA 2 Transformer 9v+9v 100VA 2 Now i know i wont need all of the bits. and will need some others. Can anyone Create a diagram . or Link a diagram for using the 5003/5004 Transistors in an amp?? i can build the PSU part fine. just not great at amps. would like 300-600 rms for a SUB 8ohm and option for sterio output.
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Jan 25, 2008 13:20
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Jonny 290 posted:That transformer (the 530 VA one, the only one you should consider for this project) will suitably drive an amp up to about 250, maybe 275 watts maximum without exceeeding its ratings. From what I remember, linear power supplies are about 50-70% efficient depending on the design. That Looks Perfect. will give 400W rms into 8ohms. That site is very helpfull too. Thanks
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Jan 26, 2008 10:49
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