aluminum tape again
Auto brake light
Back hoe log splitter
Black tape and PVC cement
Broken gas can cap
C-band dish solar furnace
Making a Cheap battery State Of Charge gauge more accurate
Cleaning the corroded buss bars from a Prius battery pack
Fixing small plastic gears
Forever solar desk lamp
How I splice audio cables
IMA motor coil shift in collision
Insight Battery pack turbo cooler
Insight Oil Pan second chance
Lifting the battery safely
making a ducted blower from a computer fan
Making an isolated hall effect current sensor with ring terminals
making a heavy workbench mobile
Making a simple IMA bypass connector from an old pack relay board
Making some custom solar panels
Measuring resistance of less than 1 ohm
Motorizing a snow blower chute
Put your exercize to good use?
Quick way to make a connector for checking the subpacks
Reading the blink codes
Real time external MPG display
Rear view Video cameras
Solar headlight
Soldering iorn degausser
Some uses of laser pointers
Taking Video of the dash
Those useful Prius subpacks
Using digital caliper to measure hole center to center distance
weed whacker motor converted to bicycle motor
When cleaning the EGR does not fix the hesatation
Where do you find high quality alligator clips?
Handy use for Aluminum tape.

Making an isolated hall effect current sensor with ring terminals

Making an isolated hall effect current sensor with ring terminals
simple isolated current sensor

Needed an isolated current sensor to sense the current in my cell level test fixture. Found a neat part made by alegro that has a compensated hall effect sensor with built in current shunt. Unlike a regular current shunt where the resistance of the shunt produces a voltage when current flows through it, this device has an integrated hall effect circuit built in. The device comes in many flavors, with unipolar or bipolar sensing up to +-150A. The best part is that the hall circuit is electrically isolated from the current path. The down side was that the device was designed to mount on a PC board, so attaching it to the big 1/4" studs that I required was dificult. I carefully straightened the heavy copper buss bar leads and sawed a slot in some heavy 1/4" ring terminals. The terminals were soldered to the straightened leads, and the fine hall effect wires were connected to three wires and strain relieved with some hot glue.
Works like a charm.