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2 votes

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 ...
bobflux's user avatar
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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.
brunobhr's user avatar
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0 votes

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 ...
Voltage Spike's user avatar
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-1 votes

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 ...
ursusd8's user avatar
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2 votes

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 ...
Simon Fitch's user avatar
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2 votes

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 ...
ursusd8's user avatar
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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 ...
Dereck's user avatar
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-3 votes

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
callmemac's user avatar
0 votes

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 ...
DrMoishe Pippik's user avatar
0 votes

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, ...
Tim Williams's user avatar
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0 votes
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 (...
Justme's user avatar
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0 votes

DC bias vs AC voltage change rate on MLCC capacitors

From your example case I assume that you are thinking of adding DC and AC bias together, but this is not how it works. Think of DC bias as a change of charge capacity (like a battery) depending on ...
Stefan Wyss's user avatar
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4 votes

Off Grid Without Battery Inverter

It's possible to run a solar inverter without battery, but if power required by the load is higher than what the PV panels can provide, then it will either shut down or reduce voltage. So it can be ...
bobflux's user avatar
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