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0
votes
1answer
96 views

Digital switch for 2000V capacitor [closed]

I want to produce a discharge of a capacitor against a test cell, as part of a study on high energy states of materials. I'm using a standard microwave oven transformer as the power supply that I ...
0
votes
1answer
69 views

How to cut of the DC supply from a high power motor control?

For my project I built a BLDC motor controller. Now I have to cut of the controller from the battery. A relay is not easy because common my application needs >200Amps The highside switches I ...
-1
votes
1answer
391 views

How to Control High Voltage/Current like A/C air conditioner with Arduino?

I need to On/Off an air conditioner with arduino. I think Relays are not suitable to handling an A/C. So experts please help me.
1
vote
3answers
2k views

High current, low voltage switch

I have a serious hobby coilgun project powered by a 6S (25V) LiPo Battery. Currently i have the LiPo, capable of at least 600A burst current connected to a ~75mOhm circuit for some 300+A of peak ...
1
vote
2answers
287 views

How much power (amps) through 5.5mmx2.1mm power jack? Through a DC switch?

I am in the process of building a DSLR cooler (I use it for astrophotography) using a couple of TEC1-12703s (12V 3.3A) or TEC1-12704s (12V 4A). The ultimate idea is to run the TEC's at a higher power ...
1
vote
2answers
2k views

Make-Before-Break Relay with Very High Continuous DC Current

I need to use a relay in order to do field sweeps with my electromagnet, which is hooked up to a couple very beefy monopolor power supply. (My magnet's impedance is ~2 Ohm, and I am putting ~40 Amps ...
0
votes
1answer
1k views

Separated powers and high power switches? Alternatives to relais?

I want to use an Arduino (5V, 0-40 milliamps) to control some switches, which in turn control a high current line (12V, 40A). But the relays which I use use too heavy coils for the Arduino to pull off....
0
votes
2answers
186 views

Slowly supplying power to a very high load

Is it possible to supply power to a very high load within a huge time range? This question particularly regards MOSFETs. I know that a MOSFET must switch fast so that a little power would develop ...
2
votes
1answer
590 views

Help dimensioning mosfet as switch with high current

I have the same problem as the guy in this question, but in this case the input voltage varies from 20 volts to 28 volts. I would like a current of 20A to flow through the mosfet without it getting ...
3
votes
2answers
548 views

Is it possible to switch relay above the power spec?

I am planning to use a DC drived SPST reed relay. Below I include the spec for voltage, current and power ratings. Contact Rating: 200W Carry Current: 5A Switching Current: 3A Switching Voltage: ...
0
votes
3answers
915 views

Question concerning n-MOSFET switching

I am wanting for safety a uC to determine a few environmental checks before a device is allowed to be activated, it is a relatively low voltage (2V) however high current (4A) load (powered by a beefy ...
2
votes
4answers
1k views

Are vacuums tubes suitable for switching high current (~30amps) at high frequencies (~K-Mhz)?

I was looking to build a system for high currents (say ~30 amps) and a friend suggested vacuum tubes. In theory, vacuum tubes seemed more robust for high current applications, but after looking around,...
5
votes
9answers
17k views

Switch capable of very high current?

I need to design a circuit that can turn a DC motor on and off. The motor is like a winch motor on a truck an can draw high amounts of current, in some cases up to 200Amps. The motor runs at standard ...