New consulting relationship with GreenTecAuto begins
What actually goes wrong with the batteries????
A look at todays Hybrid and EV battery packs
Battery packs exposed
Keeping Warm In New England
Plugging into the SUN
Making a small solar concentrator
Building MIMA and the plug in adapters
Converting a telephone truck to electric
DIY dual pulse Capacitor Discharge Spotwelder
Getting in shape while making electricity
Replacing gasoline with solar electric lawn equipment
What is Genesis One?
How to stop the aging process DIY
MIMA Install Day 2005 a Big Success!
Building a hybrid car grid charger
Assembling the bases
building it bigger 4.5A
Calibrating the temperature
Calibration and test of components and boards
Charger # 1 goes into beta testing
Discharger # 1 / gridcharger cycler accessory
Fan and temp boards
Getting serious
Harnesses for the Insights are nearly finished
Helpers make it go much faster
Inside the overnight charger
Modified overnight boxes
More thermal testing
Moving towards the goal line
PTC strip monitor and charger shutdown circuit
Temp volts and current calibration fixture
Test of accuracy
The code
Thermal testing.
The weather slows us down
Tapping into the Wind
Expanding MIMA with the Distribution board ( users projects )

Temp volts and current calibration fixture

Temp volts and current calibration fixture
Calibrating and testing the chargers and harnesses

To make the test and calibration of the chargers and harness proceed as quickly and accurately as possible, I built a test fixture. The 100W resistors allow full power test, which presents a stable voltage and current, as well as a temperature controlled oven for an elevated stable temperature reference.
This oven was made from a big aluminum heat sink.
The fins are curved so they make spring pressure mechanical contact with the part of the temperature probe that is the sensing chip.
This makes for reasonable warmup and settling times, which we use to test and calibrate the voltage and current analog signal conditioners, as well as being a 100% test of the charger harness and output connections.