FM Telephone Bug ... Here is a simple transmitter that when connected to a phone line, will transmit anything on that line (execpt the dial tone) to any FM...
Tone Control ... This simple tone control can be used in may audio applications. It can be added to amplifers, used as a stand alone control module, or even...
236
Nicolae Sfetcu
nsfetcu@...
Oct 4, 2001 4:54 am
Parts List BR1 = Bridge Rectifier, 100V - 3A C1 = 2200 µF, 63V IC1 = LM317, adjustable regulator C2 = 0.1 µF V = Meter, 30V, Ri = 85 ohm...
237
Nicolae Sfetcu
nsfetcu@...
Oct 8, 2001 10:45 pm
238
Nicolae Sfetcu
nsfetcu@...
Oct 10, 2001 12:09 pm
PARTS C1: 1000uF C2: 0.1uF R1: 20K Potentiometer R2: 1K R3: 1K R4: 1K T1: BC 558 or similar T2: BC 548 or similar T3: 2N 3055 IC1: 555 timer EXPLANATION This...
239
Nicolae Sfetcu
nsfetcu@...
Oct 11, 2001 5:30 pm
Circuits in the Circuits Archives ... a.. Collection of Ascii Circuit Diagrams [V1.00] a.. Miscellaneous Circuits (21 circuits) b.. IR Related Circuits (7...
240
Nicolae Sfetcu
nsfetcu
Oct 12, 2001 9:59 am
Ian Purdie's Buffer Amplifiers THE DESIGN PRINCIPLES OF BUFFER AMPLIFIERS What exactly is a buffer amplifier, what is its purpose in life? This class of...
241
Nicolae Sfetcu
nsfetcu@...
Oct 15, 2001 10:10 am
A PRACTICAL EXAMPLE Here I'm going to use a very practical example where one of my readers has a requirement for a voltage controlled oscillator operating at...
242
Nicolae Sfetcu
nsfetcu@...
Oct 16, 2001 4:41 am
TRIAC Light Dimmer ... This little circuit can be used to dim lights up to about 350 watts. It uses a simple, standard TRIAC circuit that, in my expirience,...
243
Nicolae Sfetcu
nsfetcu
Oct 17, 2001 5:52 pm
Electricity/electronics articles here: a.. Electrostatic Speakers b.. Right Angle Circuitry c.. Interesting Toys d.. Electricity Article List e.....
244
Nicolae Sfetcu
nsfetcu
Oct 18, 2001 11:19 pm
NEWSGROUPS via GOOGLE) Slashdot, Memepool, BottomQuark , and The Onion a.. Article about Google takeover of Deja.com b.. SCI.ELECTRONICS.DESIGN c.....
245
Nicolae Sfetcu
nsfetcu
Oct 19, 2001 6:06 pm
Other Peoples' Electronics Hotlists a.. ePanorama, main hobby electronics resource b.. Experimenter's Corner Links c.. Alex's Tutorials links d.. T. Engdahl's...
246
Nicolae Sfetcu
nsfetcu
Oct 21, 2001 6:07 pm
Thanks, Bela! Nicolae Sfetcu _/_/_/_/_/_/_/_/ ... From: "bela ofori" <erau_3000@...> To: <nsfetcu@...> Sent: Sunday, October 21, 2001 7:14 PM ...
Dear members, I am very sory for my last message, I didn't verify the links and I make a big mistake. It will never happens again. Regards, Nicolae Sfetcu...
251
Nicolae Sfetcu
nsfetcu
Oct 27, 2001 1:48 pm
http://www.uoguelph.ca/~antoon/circ/circuits.htm Miniature FM Transmitter #1 ... Additional Notes The default for the capacitors type is ceramic, preferably...
252
Nicolae Sfetcu
nsfetcu
Oct 29, 2001 11:11 am
Quiz-Show Indicator From: dthomas@... (Dave Thomas) "Name something you eat with eggs." -<bzzzzt!>-"Fiberglass." Here's a simple, cheap circuit that...
253
Nicolae Sfetcu
nsfetcu
Oct 30, 2001 6:06 am
NOTE: Error Fixes! D1 and SCR1's anode/cathode were shown reversed in the circuit diagram. Corrected all capacitor designators to right values. Updated the...
254
Nicolae Sfetcu
nsfetcu
Oct 31, 2001 5:27 am
Frequency and Capacitance meter From: kenny@... An [...] idea is to use the 555 as a monostable, and trigger it with a fixed frequency clock. Duty...
255
Nicolae Sfetcu
nsfetcu
Oct 31, 2001 11:19 pm
Thank you, Bela! Nicolae Sfetcu _/_/_/_/_/_/_/_/ ... From: "bela ofori" <erau_3000@...> To: <nsfetcu@...> Sent: Wednesday, October 31, 2001 7:02 PM...
256
Nicolae Sfetcu
nsfetcu
Nov 1, 2001 6:13 am
Applying the Brakes: When you first press the brakes, this circuit will turn on your 3rd brake light via the main brake lights. After about a second a series...
257
Nicolae Sfetcu
nsfetcu
Nov 2, 2001 5:32 am
(from ASCII circuits) CMOS Oscillator From: mjohnson@... (Mark Johnson) ... The circuit below uses a single CMOS lowspeed 74C14 inverting Schmitt...
258
Nicolae Sfetcu
nsfetcu
Nov 5, 2001 6:15 am
Adjustable flashing LED From: dwg@... (David Grieve) Use a 555 timer IC as the (resistor controlled) frequency source, choose component values...
LED Display controller From: byron@... (Byron A Jeff) " I would like to make a big LED scrolling display (like the ones you find in a bank), about 10...
261
Nicolae Sfetcu
nsfetcu
Nov 8, 2001 12:24 pm
Info on CO2 lasers wanted (ho hum) From: wouter@... (Wouter Slegers) I'd like to get some info CO2-lasers... I read the following on a BBS.....
262
Nicolae Sfetcu
nsfetcu
Nov 9, 2001 10:40 am
Crystal 32.768KHz CMOS Oscillator From: cs911225@... (KEN E WILLMOTT) Try a Pierce oscillator, with the following specific component values: 1/6...
