Here are questions that Google couldn't help me answer. Please help me answer just as many as you can, thank you!!
1) I have a 6VDC brushed motor. Can I run it with 12VDC? I hear both that it would shorten its lifespan, and also that it should be perfectly fine. What's the truth, in my case?
2) I hear that supplying insufficient voltage to a DC motor will cause it to draw too much current and thus get too hot. Is that because an insufficient voltage drives the motor with insufficient speed&back-EMF, which is actually the direct reason of it drawing too much current? If yes, then would I be right in guessing that supplying an appropriate voltage to a motor but also holding the shaft still would also cause it to draw too much current? If no, then why do insufficient voltages cause motors to draw too much current?
3) I bought a 5mW laser pointer that works with 2 AAA batteries, which I know is ~3VDC. However, when I take out the batteries and connect it to my PC's PSU in different ways to supply it 3, 3.3, 4, 4.5, 4.8, 4.95, and 5 volts, how come it only works when I supply 5 volts? And I measured it with my multimeter while it's all connected and the "on" button is pressed, so I don't think it's because I messed something up regarding laser diodes being non-ohmic devices. Do batteries have some unique characteristic that accounts for this?
4) Is there a device that takes in a voltage input and outputs a corresponding position, like a speaker driver, but with a higher displacement range? And I'm not talking about a servo, because data, not voltages, correspond to positions (or so i've heard) for those. I'm looking for either rotary or linear displacement.
5) Is there a transistor or op-amp I can buy that has similar characteristics to the TIP31C, but maintains a constant voltage and amplifies only the current?
6) What is the common voltage range for music signal coming out of a desktop headphone jack? Sometimes my multimeter reads between 0 and negative 1.3V, sometimes between 0 and positive 1.3V, and sometimes simply doesn't ever go over 100mV even when I'm playing songs with lots of bass at max volume. And google-imaging music oscilloscopes reveal a wide range of voltages, so I'm confused.
8) Is there a device that takes a voltage input and outputs a PWM, with higher frequency output corresponding to higher voltage input?
9) Laser diodes often have duty cycle specs, for example, 45 minutes on and 15 minutes off. If I cool it sufficiently, could I keep the laser diode on indeterminably without reducing its lifespan?
10) I have an electromagnetic relay that has the label
"COIL: 24VDC
CONT: 40A/30A 12VDC". What does that mean?
1) I have a 6VDC brushed motor. Can I run it with 12VDC? I hear both that it would shorten its lifespan, and also that it should be perfectly fine. What's the truth, in my case?
2) I hear that supplying insufficient voltage to a DC motor will cause it to draw too much current and thus get too hot. Is that because an insufficient voltage drives the motor with insufficient speed&back-EMF, which is actually the direct reason of it drawing too much current? If yes, then would I be right in guessing that supplying an appropriate voltage to a motor but also holding the shaft still would also cause it to draw too much current? If no, then why do insufficient voltages cause motors to draw too much current?
3) I bought a 5mW laser pointer that works with 2 AAA batteries, which I know is ~3VDC. However, when I take out the batteries and connect it to my PC's PSU in different ways to supply it 3, 3.3, 4, 4.5, 4.8, 4.95, and 5 volts, how come it only works when I supply 5 volts? And I measured it with my multimeter while it's all connected and the "on" button is pressed, so I don't think it's because I messed something up regarding laser diodes being non-ohmic devices. Do batteries have some unique characteristic that accounts for this?
4) Is there a device that takes in a voltage input and outputs a corresponding position, like a speaker driver, but with a higher displacement range? And I'm not talking about a servo, because data, not voltages, correspond to positions (or so i've heard) for those. I'm looking for either rotary or linear displacement.
5) Is there a transistor or op-amp I can buy that has similar characteristics to the TIP31C, but maintains a constant voltage and amplifies only the current?
6) What is the common voltage range for music signal coming out of a desktop headphone jack? Sometimes my multimeter reads between 0 and negative 1.3V, sometimes between 0 and positive 1.3V, and sometimes simply doesn't ever go over 100mV even when I'm playing songs with lots of bass at max volume. And google-imaging music oscilloscopes reveal a wide range of voltages, so I'm confused.
8) Is there a device that takes a voltage input and outputs a PWM, with higher frequency output corresponding to higher voltage input?
9) Laser diodes often have duty cycle specs, for example, 45 minutes on and 15 minutes off. If I cool it sufficiently, could I keep the laser diode on indeterminably without reducing its lifespan?
10) I have an electromagnetic relay that has the label
"COIL: 24VDC
CONT: 40A/30A 12VDC". What does that mean?