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  1. S

    Bluetooth profiles

    Hello all, I have decided to set before me a little challenge - to make a simple device (for starters only LED toggling will be enough) which could be controlled by any of the Bluetooth capable smart phones on the market these days. After quite some digging around on the internet a lot of...
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    Problem in simulating a step-up converter with LTspice IV (using LT1170)

    Hello! I am fairly new to DC-DC converters and LTspice and have, logically, stumbled on a problem when designing and simulating my first boost converter. The specifications for the converter are: input voltage ranging from 3-12V, output voltage 17V and output current ranging from 10mA to 1.01A...
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    Variable duty cycle sawtooth generator

    Thank you for the reply. I've missed the minimum voltage gain 3, but in the simulation the output of the follower outputs a nice square wave (at least in the spice simulation) despite the gain lower than three. Another thing which indicates, that the opamp is not to blame is, that the problem...
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    Variable duty cycle sawtooth generator

    Hello! I have been trying to build a generator, which will output a triangle/sawtooth wave with variable frequency and duty cycle. I came up with the circuit attached to the post. It works quite nice up to around 500kHz (my aim is 1Mhz) but then the problems begin. Actually the most disturbing...
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