Dim display problem on large LED digital clock
visitors this year: 860 The digits at one end of a large LED clock displayed much more dimly than they ought. I’d say they were about half the brightness – and it was quite...
visitors this year: 860 The digits at one end of a large LED clock displayed much more dimly than they ought. I’d say they were about half the brightness – and it was quite...
visitors this year: 61 Capacitor charge and discharge The voltage & current of a capacitor are measured as it charges and discharges. Sensors allow a graph to be plotted as this happens. The effect...
visitors this year: 80 Current-Voltage relationships In this experiment the resistance of a lamp, resistor or diode is measured as the current is varied. Voltage and current sensors make the measurements while the software...
rogerfrost.com is a compendium of ideas for using technology with sciencey questions in mind. Started in 1995 to offer ideas to school science teachers, Roger Frost expanded the coverage to home automation, gadgets and sensors to measure, or understand, what’s going on around him.
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Roger Frost has been writing about technology since 1988 and this web includes articles; radio interviews with scientists and tutorials to use technology at home and the classroom.
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