Posted on 23 Jul 2008
The result summarized on this web page is a fully functional (memory)scope that samples the analogue input signal and subsequently displays it on a normal TV. Unfortunately the µSCOPE works only on 625 line PAL standard TVs, and It was never the intention to build a sophisticated measurement instrument. Nevertheless, signals up to a few kHz are reasonably well displayed by this simple circuit that can be build for only a few euro.[more]
Posted on 13 Jun 2008
It uses a matrix of 100 LED’s for a display, and does suffer from being slow and having rather poor resolution. Still we could display a sine wave running at 500Hz without trouble, that that’s not all that dissimilar to commercial solid state osscilloscopes.The circuit displays an understanding of the mechanics of displaying an analogue waveform. The timebase is simply a 555 generating a horizontal sweep, while the vertical amplifier is 3914 with a trimpot on the front. It’s extremely simple, but it works. [more]
Posted on 12 May 2008
Wilson writes:This oscilloscope uses a 1-inch diameter Mullard DH3-91 CRT. I found it at a car boot sale, priced ฃ1. I’m ashamed to say I didn’t recognise what it was: I only bought it because it looked wierd and interesting! Ian did the main design and prototype work on the ’scope, then I rebuilt it with a PSU and front panel controls, and packaged it nicely. Click here to read about Ian’s prototype. The size of this oscilloscope is 164 x 83 x 83mm (6.5 x 3.25 x 3.25 inches).[more]
Posted on 20 Mar 2008
The Scopetris is an AtMega32 was equipped with R-2R ladder D/A converters for controlling the beam of an old oscilloscope. To get some fun out of the setup, a Tetris clone with chain reactions was implemented. Beat the highscore[more]
Posted on 08 Mar 2008
This circuit dates back to at least 1935 and is a simple cheap adapter that converts just about any oscilloscope into a component tester. It causes a component’s current vs. voltage characteristics to be displayed on an oscilloscope’s screen. The name “Octopus” is attributed to a Marine Corporal who reinvented it in 1968 while working working on Tactical Navigation Systems at NAS Newriver, NC. He called it “The Octopus”[more]
