What happens if I connect two different DC voltage sources in?

What happens if I connect two different DC voltage sources in?

Series would only work to make 17V is both were independently floating, which they are not. It is not possible to connect two supplies with a common ground in series. Whether series or parallel, either way is a REALLY BAD IDEA. Any questions? In parallel, your overall voltage would be +12V. Your +5V feed will be being over-powered by +7V.

What should the voltage of a logic input be?

“Acceptable” input signal voltages range from 0 volts to 0.8 volts for a “low” logic state, and 2 volts to 5 volts for a “high” logic state.

Is the voltage between two ground lines always the same?

Also, remember that voltage is always the difference in potential between two points, and this is usually kept constant in an electronical circuit by the voltage source. So whether you pour more or less electrons into the ground line, the voltage between the ground line and e.g. the +5V rail will always be the same.

Why are power supply voltages not the same?

The problem is that the power supplies don’t have exactly the same output voltage. The power supply with the highest output voltage will provide all the current that the circuit is requiring until it reaches it’s current limit. What happens then depends on the current limit circuit inside the power supply.

Is it possible to connect two power supplies?

It is not possible to connect two supplies with a common ground in series. Whether series or parallel, either way is a REALLY BAD IDEA. Any questions? In parallel, your overall voltage would be +12V. Your +5V feed will be being over-powered by +7V. You will probably be doing damage to the internals of your power supply.

When to not connect power supplies in series?

First, the combined voltage should not exceed the output breakdown voltage rating of the supplies. So, for example, don’t connect the outputs of three 200 volt supplies in series if their output breakdown voltage rating is 600 volts or less.

What happens if I connect two switching supplies?

With two switching supplies though, as W5V0 has noted, the resultant voltage will likely be the higher of the two, as the lower rail cannot sink current (due to the diode) and will effectively look high impedance to the 12V rail. So all that should happen (see below) is the lower rail will rise to the potential of the higher rail.

Why does a doubler have a higher voltage than a DC?

A basic doubler transforms the peak value of the AC into a DC voltage twice that value. The amount of current which a doubler can provide is a function of the capacitor size, so higher current requires higher capacitance.

Can a high voltage circuit be used with a low voltage circuit?

If only a low voltage DC source is available, designers can implement a circuit based on a boost-mode DC/DC switching regulator designed for this purpose. If an AC line is available, then one or more voltage doubling circuits can be used (Figure 1).

Is it safe to connect + 12V to + 5V?

Connecting the +12V and +5V in series is only “safe” if one of those rails has a return independent of the other. If the returns are common, all you’re doing is short-circuiting the rail that’s on the “bottom” (the rail that has a return connected to the high side).

How many volts does a microcontroller control power supply?

This is simple to build microcontroller controlled power supply that can switch between 5 (or 32 or more) preconfigured voltages between 1.2 to 33 volts dc and up to 3 amps.

Can you share the same negative wire on two separate DCS?

Voltage does not “flow”, so that is part of your problem in thinking about it. Voltage is a measure of potential difference between to points. In some respects, your question is like asking if you can build an eight story building on the same ground that you’ve already built a twelve story building.

How many amps can a voltage regulator supply?

The voltage regulator is capable of supplying in excess of 3 amps over an output voltage range of 1.2Vdc to 33Vdc. Its ease of use, thermal overload protection, large voltage range, current limiting, and high ripple rejection make it a great choice for a variable power supply.