Active crossover network using 555 timer as class d amp
Perhaps some of you have already seen my blog in DIY audio forum showing practical use of 555 timer as class d amp source. Indeed, the circuit is quite an interesting subject to exploit specially to some curious folks looking for cheap but good sound class d audio amp project. The same circuit is shown [...]
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Class D amp using TL494 DC to DC converter chip
Class D amp using TL494 DC to DC converter chip It’s almost 5 years now since I publish a topic regarding how to use TL494 as class d amp in a popular DIY audio forum. I think it’s quite good to include this article here also. By the way, before I publish that topic I [...]
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2 channel 555 timer class d amp source
It’s more than one month now since I updated my last post and I regret that I couldn’t post anything within that length of time. This is due to the nature of my job. We left Tilbury last month and now we transferred here in Bremerhaven shipyard and our ship is still being dry docked [...]
Sound Card Oscilloscope
sound card scope 1.32 As an electronic hobbyist, I always wanted to own a sound generator good enough as signal source for my audio test needs. Since most audio test instruments available are expensive and some are bulky to occupy my work bench, my options have been narrowed down when I came across on the [...]
Bias scheme for 555 timer as class d amp
I’m almost in the process of preparing another article to post but my attention was diverted again to the previous 555 timer circuits I made. I simply couldn’t afford to leave the circuit that way. I am concerned that by changing the 2N3904 with the same type of transistor but of different hfe, the duty [...]
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Full bridge class d amp using 555 timer
Ok, I’ve been so busy for the past few weeks and I couldn’t make a follow-up from the last article of the 555 timer circuit. So here is another improvised model circuit that will eliminate the unwanted DC offset voltage from the output that affect the previous one discussed. By the way, all previous circuits [...]
Class D amp made easy with 555 timer IC
This is a continuation of my previous article regarding class d amp using 555 timer chip. Looking back to several schematics on that article, some of you may wonder why I include another 555 as U2 in the drawing. The main purpose of this U2 is to establish constant frequency trigger on pin 2 of [...]
Class D amp using 555 timer
Perhaps 555 timer is the most versatile chip ever introduced during the 70’s and still being used by many due to its inherently innumerable uses such as LED flashers for toys, battery regulators for cars, precision timing device for instrumentations and the list goes on. Not to mention its dirt cheap price and one of [...]
Low power class d amp turorial
This article is intended for electronic hobbyist or students alike who are interested in learning the basic operating principle of these audio amplifiers popularly known as class D amp. These types of switching amps are ideally suited for battery operated gadgets and are popularly being used in cell phones, set top boxes, and most MP3 [...]
