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    Sourcing hall effect current sensor from Honeywell Sensing and Control

    I've managed to find a really nice hall-effect type linear current sensor package from Honeywell Sensing and Control. Its the CS series and has the hall-effect sensor embedded into a ring-concentrator, all in a nice package. Trouble is - I'm having trouble finding anywhere that can get me one...
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    Interfacing hall-effect sensor to embedded CPU

    I'm trying to interface an Allegro A1360 half-effect sensor to a TI MSP430 CPU. The A1360 is a 5V device whilst the MSP430 operates from a 1.8V to 3.6V supply. The MSP430 has onboard ADC, but the analog input pins have an absolute max rating of VCC + 0.3V. I have both 3.3V and 5V regulators on...
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    DC circuit breakers rated >63A?

    Wow, thanks for that - 600A!!! Fantastic.
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    DAC with SPI recommendation

    Can anyone recommend a DAC with SPI. 10 or 12 bit would be good. It will be driven by a 3.3V TI CPU. Analog output would be 5V min, but up to 10V would be good. Also, if it has an evaluation PCB option that would be a good bonus. Thanks.
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    DC circuit breakers rated >63A?

    Anyone know of anywhere I might get hold of a DC circuit breaker rated higher than 63A? We are currently using the Teresaki 4500 series C63 but want to go higher. Yes,  I know it's a high current but those of you who know me will know why!!!
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    Using electro-plating rectifier as a low-voltage high-current power supply

    By "load" I meant the entire load that the PSU sees. The coil itself is made of Type 2 Sumitomo superconducting tape which zero resistance. However, the copper surround and interconnects have small resistances associated with them. Sorry, but my resistance estimate of 0.1 Ohm missed a zero and...
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    Using electro-plating rectifier as a low-voltage high-current power supply

    We've been looking for a low-voltage high-current power supply for our lab to put between 200A and 1000A through a superconducting coil with inductance of 50mH. Total resistance of the load will be around 0.1 Ohm. The only thing I've been able to find so far is an electro-plating rectifier...
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    MOSFETs with built in reverse current diodes

    I see -  thanks for the clarification. So, if I want to protect the diode against reverse current I'm guessing I should use an external diode across drain and source, possibly a schottky? My other thought was maybe to use a 2nd MOSFET connected in parralel to the 1st and in reverse, then...
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    MOSFETs with built in reverse current diodes

    Alot of MOSFETs come with a built-in diode across the source and drain. The attached diagram outlines what I mean. I would like to confirm that the purpose of this diode is to allow the MOSFET to handle reverse current to flow. I know this question might sound really dumb, but I'm not an...
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    2V high current power supply for homopolar motor

    Thanks, and sorry for wasting your time with the double-thread. I'm now starting to lean towards the 2V LA battery solution now as a real possibility. The reason I didn't jump straight into to this solution in the first place is two fold: 1) It leads to a pseudo fixed-voltage solution that is...
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    2V high current power supply for homopolar motor

    I'm trying to drop the voltage of a 12V to approx 2V but allow many 100s of amps to be drawn, in order to provide power to an experimental DC motor. I've considered many options, of which the TPS40180EVM module is my favourite so far. However, I'm playing around with another option of turning...
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    2V high current power supply for homopolar motor

    Homopolar motors offer some advantages in certain environments, particularly where low RPM, high torque is desirable. Also, they are so simple that they can be made to be extremely quiet (hence the reason they are often used in submarines). Our experiment is to explore new and novel homopolar...
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    2V high current power supply for homopolar motor

    Hello, sorry if I antagonised you - that was not my intention. I'm here because I would like to be helped and upsetting people was certainly not on the agenda (and not a good way of going about getting help). Clearly I have misjudged the amount of information I would need to provide in order to...
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    2V high current power supply for homopolar motor

    The desgin is a bit different from textbook homopolar turbines, so that may be confusing. I have a working prototype of the motor here. Using a heavy duty Lab DC PSU, when we apply 2.0V to the motor it draws 100A at rotates at approx 2000rpm. At 3.5V it draws 180A and rotates at around...
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    2V high current power supply for homopolar motor

    It's an experimental homopolar turbine.
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    2V high current power supply for homopolar motor

    I need to design a power source capable of delivering high current (maybe 200 or 300A) at only 2V. I thought I may be able to use TIs TPS40180EVM module - it has a lower current rating that I'm after, but you can stack them in a modular fashion. However, I wondered if anyone had any better...
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    H-bridge using only n-channel mosfets

    I have created an H-bridge PC with 4x floating gate drivers and 4x IGBTs (see attached schematic showing half of h-bridge). It works very nicely but I would like to replace the IGBTs with n-channel MOSFETs. However, all the H-bridge designs I've seen use n-channels on the low side and...
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    Evaluating total energy usage from just DC voltage and current

    Say, that's a really nice bit of kit at a decent price - great find!!
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    Evaluating total energy usage from just DC voltage and current

    Yes, we are talking 10mV over the 200V range - I admit it's a tall order..........
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    Evaluating total energy usage from just DC voltage and current

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