By Keith Brindley (Eds.)
All the initiatives during this choice of info documents presents a 'building block' which constructors can use to test with elements and use as a kick off point for additional improvement. This publication will hence offer a toolkit for construction audio platforms and circuits in keeping with available parts utilizing straight forward techniques.
Maplin employees are skilled companies of venture principles with precious gains and plenty of purposes. all of the circuits during this publication are dependent round on hand chips, and supply an exceptional strategy to get to grips with the features of the chip in addition to delivering building information for necessary initiatives. every one comprises pinouts and pin designations, output waveforms, elements lists, circuit diagrams, PCB layouts and images of the forums. The tasks defined during this ebook are in keeping with these showing within the renowned information documents function in Electronics, the Maplin Magazine.
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Extra resources for Audio IC Projects. A Collection of Useful Circuits Based on Readily Available Chips
Printed circuit board A high quality glass fibre printed circuit board, with a silk screened component legend to aid construction is available. The printed circuit board has a 0 V star earth to minimise current return interaction from the speaker, amplifier and input, this will also help to maximise sound quality. 29 shows the printed circuit board and component legend. 30 shows the required leg shape and drilling details for mounting the TDA1514A integrated circuit onto a heatsink. 5 V, R3 = 20kii, input signai 1 kHz sinewave.
Figure 2 . 6 A typical peak detector and hold circuit IC power supply requirements The LM13700 integrated circuit requires a split rail power supply and will operate over a wide range of voltages between ±2 V and ±15 V. It is important that the supply is adequately decoupled in order to prevent the intro duction of mains derived noise onto the supply rails. Decoupling close to the integrated circuit is also impor tant as this helps to prevent any instability that may 53 Audio IC projects occur.
Current consumption is dependent on the load being driven and the amount of power developed. The quiescent current is typically around 4 mA. Low voltage operation and the requirement of very few external com ponents makes the TDA7052 ideal for battery-powered equipment. The type of battery used will be determined by the maximum current consumption under full load and also of course by the size of the equipment into which the amplifier is to be incorporated. 22 Power derating curve TDA7052 kit A kit of parts including a high quality fibreglass printed circuit board is available as an aid to constructors, for a simple application circuit using the TDA7052.
Audio IC Projects. A Collection of Useful Circuits Based on Readily Available Chips by Keith Brindley (Eds.)