And here are some small pages for you with "bite sized" introductions to various useful, fun components or issues....
The Voltage Divider: An important element of many designs Opto-isolator, or optocoupler: Simple use with microprocessors, other digital circuits. Protection/ level shifting Level shifting: Using a transistor as a switch, to "connect" 12v devices... input and output... to microprocessors and other digital circuits not working at 12v. Relays- YOU NEED A DIODE: Use relays with microprocessors.. and important "detail". LEDs: Pretty! But be sure to use current limiting resistors Digital temperature sensor: Dallas DS18B20. Using it with little code, little effort Sensor for IR signals from remote controls: Use the TVs remote control as a keyboard for your microprocessor project Humidity and temperature sensors:DHT11 or DHT22 or AM2303. Inexpensive, and digital Electromagnetic Strikeplates: The heart of an access control system Dangerous electricity: Household AC... 110v, 230v Plugs: How to connect to dangerous electricity Have a magnetic personality? Or at least a magnet? Sensing with reed switches and Hall effect sensors Sensing light: various options. LDR, phototransistor, AmbiLight Sensor RS-232 and "serial" are not the same: What you need to know Speech synthesis / Voice synthesis: Tremendous fun! Easy. Inexpensive ($25 @8/10, + p&p)... and controlled over a simple serial link. You only use a single I/O bit on the device controlling the display, to "say" what you want to...over a speaker.. or down a phone line? Lots of fun possibilities. It can either be a "printer" (outputting speech) connected to your PC or microcontroller, or filled with phrases and operated independently. Seven segment LED display: Four characters. Inexpensive ($13 @8/10, + p&p)... and controlled over a simple serial link. You only use a single I/O bit on the device controlling the display, to "say" what you want shown on the display. Control VGA display with single serial line: Inexpensive (£25 @11/14, incl p&p in UK) small board which can generate an image on a VGA display. Character based, 50 lines of 100 characters. You only use a single I/O bit of the device controlling the display, to "say" what you want shown on the display. It can have multiple windows, and each scrolls and line-wraps automatically. In multiple colors. Read a USB keyboard with single serial line: Inexpensive (£14 @12/14, incl VAT, but not p&p) small board which can interface an ordinary USB keyboard to your microprocessor project. Turns key presses into serial data.
Besides those pages, I also offer an organized tour of using computers (large and small) for sensing and control: sensors, actuators (or "effectors"), and the processing to integrate them. Those pages are hierarchical, to help you study what you want to study. (Those pages also get into the details of specific devices.)
I've spent most of my time on the digital side.
If only I had been at school after 1985! If only I had some local fellow enthusiasts!
I get a lot of pleasure from my dabbling with electronics. My most gratifying 'triumph' to date was building, from scratch, the hardware and software for a 6802 single board computer.
EVERY school (and many homes) should be introducing children to the hobby of electronics. I hope the pages attached to this will help anyone so inclined.
In December 2014, I came across a nice site with a Java applet which provides you with neat, interactive, graphics illustrating many principles and basic circuits (A sub-page of Falstad.com). You have to click on the "go to the applet" link, and then load the different simulations using the "circuits" menu item.
The globe on the right helps me see if doing these pages is worth the time it takes. It is interactive; play with it, if you wish. (You need to use your browser's "back" button to get back here after doing so.) The only information the system records is when visitors access the site, and where their ISP connected them to the internet. (In my case, that is 60 miles from where I live, at the moment.)
Click here to visit my homepage where you
can explore other areas, such as education, programming, investing.
The gates in my computer are AND, OR and NOT, not Bill.
Looking for email, domain registration, or web site hosting? If you visit 1&1's site from here, it helps me. They host my website, and I wouldn't put this link up for them if I wasn't happy with their service. They offer things for the beginner and the corporation.
Ad from page's editor: Yes.. I do enjoy compiling these things for you. I hope they are helpful. However... this doesn't pay my bills!!! Sheepdog Software (tm) is supposed to help do that, so if you found this stuff useful, (and you run a Windows or MS-DOS PC) please visit my freeware and shareware page, download something, and circulate it for me? Links on your page to this page would also be appreciated!
Page tested for compliance with INDUSTRY (not MS-only) standards, using the free, publicly accessible validator at validator.w3.org
Why does this page cause a script to run? Because of the Google panels, and the code for the search button. Also, I have my web-traffic monitored for me by eXTReMe tracker. They offer a free tracker. If you want to try one, check out their site. Why do I mention the script? Be sure you know all you need to about spyware.