# Tag Info

## New answers tagged dc

### doubling up a variable 0-5V DC voltage and still being able to draw at least 100mA

OK, so: 0-5V input ; 0-10V output (gain 2) ; Output current 100mA ; Supply +/- 15V. For a high-ish output current like 100mA, it's important to check power dissipation. The output transistor in the ...
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1 vote

### doubling up a variable 0-5V DC voltage and still being able to draw at least 100mA

I finally managed by just adding a MPSA18 transistor with its base connected to the output of a TL072 configured to double the input voltage. This could allow the circuit to draw 90mA. Thank you.
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### doubling up a variable 0-5V DC voltage and still being able to draw at least 100mA

Look at charge pump doublers, they are switched capacitor circuits that essentially take two caps in parallel, charge them to Vcc and then put them in series to double the voltage. This one is an ...
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### doubling up a variable 0-5V DC voltage and still being able to draw at least 100mA

Only DIP? are you sure? haven't seen those around for a while :D anyway, yes it can be done. Two stage solution. First use opamp (whichever), and set it to gain of 2. then use n-channel mos. You can ...
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### Need help opamp or optocoupler?

If you trust the 5.8V signal to never exceed +5.8V, and to never fall below 0V, then you could employ a simple resistor potential divider: simulate this circuit – Schematic created using ...
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### Need help opamp or optocoupler?

If only level needs to be changed and no isolation is needed, you can just use a voltage divider (2x resistor). The signal is slow enough for that. You can also use opamp with gain lower then 1 to ...
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1 vote

### SPDT with high amps

The specifications for the switch will list the maximum voltage and current, make or break, and voltage type AC, DC, or AC/DC. You want a switch with a DC rating that meets or exceeds your ...
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### SPDT with high amps

Would 10 volts really matter. you can step down the coil with a resister. Amazon has DG85B-8011-96-1024-M1DR AUTOMOTIVE RELAY, SPDT, 24VDC, 60A

### SPDT with high amps

The voltage rating is the maximum safe voltage. A switch (or relay) rated to handle 220 volts, such as this 32 ampere switch [shown as an example], can certainly handle just 25 A at 35 V. However, in ...
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### DC bias vs AC voltage change rate on MLCC capacitors

Prerequisites: calculus, derivatives; E&M, static fields; definition of capacitance. Consider the construction of a capacitor: We have two parallel plates (or anything equivalent to them: a roll, ...
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Accepted

### DC bias vs AC voltage change rate on MLCC capacitors

You seem to be interpreting the results without considering the test conditions. Let's start with DC bias test. The website says the capacitance vs DC bias is measured with 0.5VRMS AC signal (...
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