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raspberry.pi.and.ubuntu

5 Hits, Last modified: 5 years ago

far... ===== 2nd December 2012 ===== __To backup and restore images to the SD card:__\\ sudo dd ... t too many of the Pi's limited resouces are taken up running the full linux OS and GUI -- so started l... dvising adding 2 lines to "config.txt": hdmi_group=2 hdmi_mode=85 Tried it - and this works! Now have system up on screen. Wireless keyboard working. WIFI - not

beam.components

4 Hits, Last modified: 5 years ago

ng voltage, the output is undefined. During power-up (or anytime V IN has fallen below V INMIN ), V OU... t produce a high (+5V) signal by itself. The pull up resistor is used so that when the switch is open ... ₂ QV = ¹/₂ CV² C = 4.7 10^-3 F\\ V = 2.5V\\ => U = 11.75 J\\ Can read about [[http://en.wikipedia.org/wiki/Joule| Joule]

beam.robotics

6 Hits, Last modified: 5 years ago

higher than the 0.7V set by a single diode: W= ¹ / ₂ CV² Needs to be either multiple diodes in series (trigger level = # diodes x 0.7V) or zener diod