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Return to BlogMultipurpose Lab Test Instrument Known as Multilab
Posted Feb 07, 2012 at 11:55 am
Figure 1
The multilab has been created to provide the proper testing tool when dealing with electronic projects in a lab.
The design of the project involves using a Palm Pilot PDA which will handle and eliminate the functions of a front panel so that the device would be kept inexpensive and compact. Other important components include DC reference source, high resolution DC voltmeter, digital pulse generator, and arbitrary function generator. The communication to the Palm Pilot uses the IR link provided by the irDA encoder/decoder block and the arb function utilizes the Z8 Encore’s DMA channels. Two UARTs are contained in the Z8 Encore where each includes a complete irDA encoder/decoder.
The waveform memory in the arbitrary function generator is accessed sequentially by the address counter and the data in the waveform memory array is fed to an 8-bit DAC. An op-amp is used to convert a current-mode DAC0801LCN into the required output voltage waveform. The high resolution DC voltmeter uses the TC500 since it is a precision bipolar dual-slope integration A/D converter with a built-in auto-zero function. Its design will be completed by adding a stable voltage reference and 3 capacitors.
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