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Please leave the long signature lines at home. Most especially, those involving sports, politics, or religion. Do not respond to this on the list. -- Steven Greenfield AE7HD

The main purpose of a schematic is to communicate how a circuit is connected and operates. https://electronics.stackexchange.com/questions/28251/rules-and-guidelines-for-drawing-good-schematics https://www.k-state.edu/edl/docs/pubs/technical-resources/Technote8.pdf https://www.ae7hd.com/2023/05/how-to-draw-schematic-diagrams-by-paul.html -- Steven Greenfield AE7HD

I'm glad to see some people joining and using the group. As you can see, things arn't exactly super busy yet, but spread the word, I'm sure we can get some discusion going, and thats what it's all about after all..... Hope to get the Electronics 101 web page up and running very soon, will have a basic tute on electronics princables and some link in general to electronics pages of intrest........ Will speak to you all soon I hope....... The Sinister Dragon..... (Moderator)

Hello everyone, I have created a website, called the Public Electronics Circuit Archive, where people can submit their own electronics circuits, designs and ideas for others to look at, build, modify or redesign to their heart's content. No-one gets paid, anyone can use it, and every circuit and idea becomes free-gratis public property, so everyone benefits. The circuits will be categorised, (currently 13 categories from Audio to Toys), and there is a public forum for electronics hints and tips that spring to people's minds from time to time. I think it would be a great addition to Ian's electronics list! So, if you would like to take a look (no circuits yet - get designing!!), please visit, http://www.publicelectronics.cjb.net Thanks and Regards, Dan Bartlett Public Electronics Circuit Archive Webmaster

Check it out... http://www3.ncsu.edu/ECE480/ I also put it in the "Bookmarks" section of egroups/Electronics_101 along w/ another link. Dan - you might want to stick your circuit page over there as well. See ya. JP

i have a black and decker 12v cordless drill and a resistor burnt out in the charger and i need to know what kind of resistor is needed. if anyone knows what i need please get back to me.

What does "rails" mean? For example: "5V at the rails" "rail to rail amplifiers" "As for current delivery, most will do a few milli-amps, but typically not near the rails" "an opamp with a symmetric output swing at each rail" "as long as your supply rails were properly adjusted." "This pretty much slams the square right up to the rails" Thanks, JP

a friend of mine is looking for a weller 12 volt soldering iron and the serch hasnt turned up anything. if any one knows where to order on it would be a big help. 73 kb9yet

Hi I am a new guy here and to electronics. But I'm hoping to learn enough to complete some projects I have in mind. I'm interested in setting up a system that will control a vivarium temperature humidity, lights pumps , etc and do it based not only on a schedule (ex mist 3 times a day) but also on the current conditions( ex too hot -> mist run fans,cut some lights). I know I have a long way to go before I could build it from scatch. So the plan is to learn the individual pieces then put them together. some of the parts I need build a circuit to control a relay to turn on and off a light or pump. build a circuit to monitor and display temp build a circuit to monitor and display humidity build a circuit to monitor and store temp ( probably need a pic or pc) build a circuit to monitor and store humidity ( probably need a pic or pc ) ... ... Any suggestions on where to get started? I already have some basic soldering skills and programming skills but i need to do a lot more. Hope fully I can start to pick up some of what I need here

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Hi all Great site, and just about at my level being fairly new at this game. I am a pretty keen radio monitor on both VHF and UHF as well as HF. I am very keen to get my hands on a circuit for a RF preamp for VHF, I know they can be purchased ready made but this would be my first project if I built it myself. I got a circuit for a mast head preamp from http://hem.passagen.se/sm0vpo/antennas/preamp-0.htm but I would Idealy prefer one that I can use next to the radio. Also I have searched the catalogues for a transister BFY91 without success, can another be used in its place? If anyone has a circuit for a preamp or knows a site were I can get one, or even a modification of the one I mentioned I would realy appreciate the info. Roger Harrison

I've just built an audio amplifier using an LM386, and found that though it amplifies, there is an annoying level of backgound hiss, irrespective of the volume setting or input. Also, it tends to oscillate at full volume. Can anyone offer any suggestions? regards Dominic Rivron -- http://dominic.rivron.tripod.com http://www.thehungersite.com

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I recall a book called 'Electronics 101'. Is it still availalbe? Where can it be found (online store?)?

right.. i *did* previously realise that in the v=ir equation, smaller values of r would mathematically increase v, and larger would increase :) i'm waay shagged out, and haven't got any results any way. a week of failures.

okay, v=ir, right. i've tried using resistors rated at a fraction than an ohm, but i'm not getting any increase in voltage, and all the amplifier info i can find uses a 'signal' voltage and a 'supply' voltage, ie. just using an amount of the 'supply' voltage in proportion to the 'supply,' ie. like a transistor. did i miss this? is there any way to increase voltage, or are you stuck with the max. output of your ps? i'm trying to build some cute super mini synths and stuff for gifts, so a bit frustrated since i'm on a deadline. i'm trying to power circuits with single aaa batteries.. on it's own, not even enough to trigger most leds and transistors. i have some resistors rated at .5 ohm.. it doesn't make sense to me, but what they hey. if this can be done, i'd be cool for some ideas on doing it cheaply, and in a small amount of space! :)

I have a large quantity of used Futaba M202SD08 standard character display modules (vacuum flourescent displays or VFDs) for sale for $15.00 each, with free shipping. (US only). On my VFD page at http://mem.tcon.net/users/5010/5491/vfd.htm you'll find photos, specifications, a link to the operations manual in PDF format so you can download the manual free, a link to Futaba for further information, my eBay buyer / seller ratings, and more. These VFDs can be used in a variety of applications such as BASIC STAMPS, 80C52-BASIC controllers, PCs, robotics, PICs, PLCs, miscellaneous projects for the electronics hobbyist and experimenter, and more. These displays were removed from good equipment because they weren't "showroom new". A few of the pixels are slightly dim, but each has been individually tested and found to be in good working order. Each module comes with a 30-day guarantee (minus return shipping charges) if returned in undamaged condition with your sales receipt. They may not be suitable for production use, but they are a terrific bargain for experimenters, developers, and hobbyists. These VFDs retail new for $70-90 each, but I am offering good used ones for about 1/4th that price. Only $15.00 each, shipping included. I accept personal checks and money orders, or you can use your credit card securely via PayPal to order. If you have any questions, please feel free to contact me. William E. (Ed) Miller, ASEET 11 N. Washington Street Chesterfield, Indiana 46017 USA (765) 378-0358 (evenings) prototech@... (main e-mail) coolcreek.geo@... (alternative e-mail) http://mem.tcon.net/users/5010/5491/vfd.htm

I have a large quantity of used Futaba M202SD08 standard character display modules (vacuum flourescent displays or VFDs) for sale for $15.00 each, with free shipping. (Free shipping applies to US buyers only. Non-US buyers - Please contact me to make special shipping arrangements, as you will be responsible for any charges beyond normal US shipping). On my VFD page at http://mem.tcon.net/users/5010/5491/vfd.htm you'll find photos, specifications, a link to the operations manual in PDF format so you can download the manual free, a link to Futaba for further information, my eBay buyer / seller ratings, and more. These VFDs can be used in a variety of applications such as BASIC STAMPS, 80C52-BASIC controllers, PCs, robotics, PICs, PLCs, miscellaneous projects for the electronics hobbyist and experimenter, and more. These displays were removed from good equipment because they weren't "showroom new". A few of the pixels are slightly dim, but each has been individually tested and found to be in good working order. Each module comes with a 30-day guarantee (minus return shipping charges) if returned in undamaged condition with your sales receipt. They may not be suitable for production use, but they are a terrific bargain for experimenters, developers, and hobbyists. These VFDs retail new for $70-90 each, but I am offering good used ones for about 1/4th that price. Only $15.00 each, shipping included. I accept personal checks and money orders, or you can use your credit card securely via PayPal to order. If you have any questions, please feel free to contact me. William E. (Ed) Miller, ASEET 11 N. Washington Street Chesterfield, Indiana 46017 USA (765) 378-0358 (evenings) prototech@... (main e-mail) coolcreek.geo@... (alternative e-mail) http://mem.tcon.net/users/5010/5491/vfd.htm ===== William E. (Ed) Miller coolcreek.geo@... prototech@... __________________________________________________ Do You Yahoo!? Yahoo! Auctions - buy the things you want at great prices http://auctions.yahoo.com/

Can Any one give me Any info on how to mod DVD players so they are multi code????? )O( )O( )O( )O( )O( )O( )O( )O( )O( )O( )O( )O( )O( )O( The Sinister Dragon Hey, Just because I'm EVIL, Doesn't make me a bad person...... >:-)