Throttle attenuator for an EV

[Siwastaja]

Such hand-operated appliances are designed and made by companies who test them extensively and ensure that they fail safe.

In principle what the OP is doing could be made completely safe.  In practice, there are extensive tests required to verify that, and OP is but one person. 

Of course, and this part of the critique against OP is in place. But claims that this type of devices could not be made, or that they could not be needed, are both obviously wrong. It's a product for which I can imagine very real (albeit niche) market, and which can be engineered safely and legally. Doing so is obviously not easy. On the other hand, I'm fine with OP testing his prototypes on a closed circuit, and maybe one day he's in charge of a company who makes this product safely and legally, we should be giving him benefit of doubt.

[Gyro]

But anyway, my reaction was regarding people like OP who seem to be unable to control their right foot.

I mean, one could have an actual medical condition which limits their accuracy of controlling their right foot. As OP clearly states they don't like the right foot response of their car, your "reaction" deserves a counter reaction of: no shit Sherlock.

Seems unlikely. If someone has a medical condition that makes it difficult to control a car, are they even allowed to drive?

Certainly if I developed, say, an essential tremor or ataxia, I would stop driving.

Your 'holier than thou' attitude is really beginning to pollute the feel of this forum, tggzzz. Annoying in it's way, as much as treez.

You seem uninformed too. The team of qualified doctors at the DVLA Drivers Medical Group, using detailed medical information from your GP and/or Consultants, determine whether you are still fit to drive - and trust me, they are demanding.

The dangerous people are those who 'know better' and do not recognise or disclose medical conditions. I suggest that you play safe and surrender your license now. After all, who knows what physical or cognitive conditions may be lurking that you have failed to recognise, and those around you may be too reluctant to bring to your attention. I know what's wrong with me.

https://www.gov.uk/health-conditions-and-driving/find-condition-a-to-z

[darkspr1te]

re:disabled driving

Correct, when i worked in uk I installed dual controls for driving instructors and steering/hand controls for disabled drivers, oddly enough the biggest problems was not that but drivers doors, UK parking(dont park in disable spots ppl unless you are ) and seats that allow you to be high enough but swing a portable chair over steering etc. This was back in the 90's.

To answer the issue of driving with conditions, I have petit and grand mal seizure's but thanks to a group of 4x4 racers(now living here in zambia)  i was able to compete for two years until another condition stopped me racing  , i still drive but i have a support dog who predicts them now, he's a 2 year old German Shepard called SameSame(said fast so it almost sounds like Samsam)  , if he paws me i know i need a safe space as one is coming if he licks or nudges me i need to eat.

Anyway my point is with the right support you can drive safe and not be a danger my condition is on my DL and i get another year after a doctor sign off. The real danger is unrecognized disabilities like car makers realizing that a menu to change a simple function is not safe on the road and BMW indicators, but thats another rant :-P

darkspr1te
 

[tggzzz]

Seems unlikely. If someone has a medical condition that makes it difficult to control a car, are they even allowed to drive?

And you are wrong again. There are completely legal devices e.g. hand-operated gas "pedal" replacements for those completely leg impaired, e.g. in wheelchair.

Ability to drive is assessed as a whole, and helping devices are allowed. A typical textbook example of such helpful devices are eyeglasses. You are allowed to drive with those, even if you can't without. But if you want to be a fighter jet pilot, different rules (probably) apply, and vision needs to be good even without eyeglasses.

Am I really?

Do you know the OP's medical state? Or are you just .... um, hypothesising wildly?

BTW, aircraft can be modified so pilots with some forms of "lower limb" disability can still fly. FFI see the Aerobility charity, which indicates that it is possible for such disabled people to get their PPL https://www.aerobility.com/flight-opportunities

[tggzzz]

But anyway, my reaction was regarding people like OP who seem to be unable to control their right foot.

I mean, one could have an actual medical condition which limits their accuracy of controlling their right foot. As OP clearly states they don't like the right foot response of their car, your "reaction" deserves a counter reaction of: no shit Sherlock.

Seems unlikely. If someone has a medical condition that makes it difficult to control a car, are they even allowed to drive?

Certainly if I developed, say, an essential tremor or ataxia, I would stop driving.

Your 'holier than thou' attitude is really beginning to pollute the feel of this forum, tggzzz. Annoying in it's way, as much as treez.

You seem uninformed too. The team of qualified doctors at the DVLA Drivers Medical Group, using detailed medical information from your GP and/or Consultants, determine whether you are still fit to drive - and trust me, they are demanding.

I suspect I know more that you believe, since I have had occasion to consult such people (AMEs) w.r.t. flying aircraft. It turned out there was no problem.

But let's remember this sub-thread was was started by Siwastaja tossing out a speculation about the OP into the discussion. I've no idea why, and I haven't seen anything to indicate the OP has any relevant medical condition.

As such this sub-thread appears to be no more than a completely useless hypothetical digression.

[tggzzz]

Such hand-operated appliances are designed and made by companies who test them extensively and ensure that they fail safe.

In principle what the OP is doing could be made completely safe.  In practice, there are extensive tests required to verify that, and OP is but one person. 

Of course, and this part of the critique against OP is in place. But claims that this type of devices could not be made, or that they could not be needed, are both obviously wrong. It's a product for which I can imagine very real (albeit niche) market, and which can be engineered safely and legally. Doing so is obviously not easy. On the other hand, I'm fine with OP testing his prototypes on a closed circuit, and maybe one day he's in charge of a company who makes this product safely and legally, we should be giving him benefit of doubt.

I too would be happy if the OP only tested it on a closed circuit, privately and safely and legally.

The OP has not indicated he did that.

[quince]

So, I suspect what happened is that I flipped the resistor values. I'll take the throttle out of the car, apply 5V across each 5V pin, check the outputs, then check whether adding my board does what was intended. The two resistors networks being backwards would be consistent with the car seeing an invalid signal.

I too would be happy if the OP only tested it on a closed circuit, privately and safely and legally.

The OP has not indicated he did that.

Incorrect. If you seek a page or two back, you'll see where I've indicated my testing was on a closed course.