FREE EPE SPECIAL SUPPLEMENT
- Using Graphics LCD displays with PICs! A fully detailed 16-page extra supplement which demystifies the complexities of graphics matrix LCDs. Includes many routines, flowcharts, demos. and more hard-to-get data that you just won't find anywhere else not even in manufacturers' design notes. All your questions are answered in our unique special feature.
In the March 2001 issue (P. 210): Fig. 3 capacitor C6 on pin 31 of IC1 should read C8 and is 100nF. Resistor R4 should be hard-wired on the rear of the p.c.b. between IC1 pin 17 and the most convenient +5V track point.
PC Audio Power MeterMeasures audio amplifier power output via your PC. Acts as an 8 ohm dummy load capable of handling about 100W r.m.s. and displays r.m.s./ peak wattage and peak voltage on screen. Free software is written in Visual Basic 6, and needs Windows 95/ 98/ ME (only) to run. Not suitable for Windows 2000/ NT.
Simple Metronomeanother of our "Top Tenner" projects which can be constructed for under £10 ($14). Our simple metronome is 555 based and includes a CMOS logic chip to offer a simple l.e.d. display. Safe and ideal for beginners.
Ice Alert just the thing for wintry weather conditions, our easy to build design will help warn motorists of possible adverse conditions ahead. Simple tri-colour l.e.d. display, 12V operation.
Using LM3914 Bargraph LEDs
A special designer's guide to using these versatile bargraph drivers. Plenty of practical applications are outlined, including a Signal Strength Meter, relay control board and lots more besides in our 7-page feature.
Also in this bumper issue The Schmitt Trigger (4) our in-depth series on Schmitt triggers covers Astable, Pulse Width Modulation, triangle waveforms and more; New Technology Update organic l.e.d.s make their appearance; Circuit Surgery voltage multipliers analysed; Net Work (The Internet Page) Netscape 6 takes a bow.