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Voltage, otherwise known as electrical potential difference (denoted ∆V and measured in volts) is the difference in electric potential between two points (adapted from Wikipedia). Voltage can be constant (DC) or varying (AC).

9
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2answers
I connected HC-SR04 ultrasonic sensor, to single-board computer BeagleBoard-xM. Trigger pin requires 5 V DC. However, control pins of BeagleBoard-xM can provide only 1.8 V DC. What is the best way to convert voltage to 5 V? Is there anything else I should pay attention to? …
asked Sep 3 '14 by dempap
1
vote
1answer
signals by two different GPIO ports. Presence of voltage in GPIO port, means signal to be transmitted. However, when I connected two wires for right rotation (one in conductive area "R" and the other to … GNG) signal has been transmitted when I powered supply the circuit. This makes sense, as area "R" was already grounded. The aim is a signal to be transmitted, when wire in conductive area "R" has voltage by BeagleBoard-xM. Is something like this possible? …
asked Nov 17 '13 by dempap
0
votes
1answer
As I am a beginner at electrical engineering, I try to figure out the reccomended operation conditions for H-bridge SN754410 (http://www.ti.com/lit/ds/slrs007b/slrs007b.pdf). I intend to supply with: …
asked Nov 3 '13 by dempap
0
votes
3answers
Which is the best way to amplify DC voltage from 1.8 V to 3.2 V? 1.8 V is the output voltage of BeagleBoard-xM and is intended to be logic input voltage on ic TX2 encoder. Should I concern about amperage? …
asked Nov 15 '13 by dempap
0
votes
1answer
I 'm planning to control a DC motor via certain signals. Motor requires 9 V, 700 mA of voltage approximately. The voltage will be provided by a Ni-Cd battery. However, the signals that are … responsible for the control of the motor are the output of a BeagleBoard-xM (1.8 V, 20 mA approximately). How can I combine the signals with the battery voltage in the circuit I have to construct? I am a begginer in electrical engineering and any suggestion would be appreciated. …
asked Nov 1 '13 by dempap
1
vote
1answer
I intend to control a motor via H-bridge L6205N (PowerDIP20). H-bridge's logic input requirements are: High level logic input voltage: 2-7 V High level logic input current: 10 μΑ Motor's supply … customize amperage to 9.3 μΑ (via Ohm's law) and thereafter an non-inverting amplifier (close loop gain equal to 5) to customize voltage to 2.2 V. Is my syllogism write and if not what is the way customizing both voltage and amperage? Is there something I have to pay attention for this circuit design? …
asked Nov 12 '13 by dempap