[MPJBud]

I have just wired 2 start endurance cars with f1 chips.

The first went fine and will get a run at Falcon on Thursday if the snow clears, the second was fine, wired the chip in tested it OK, glued the led and soldered the joints and now it doesn't work.

No flash or bang, doesn't even run on analogue, in fact a battery across the motor doesn't work so I replaced the motor and the new one doesn't work with a battery across the terminals.

Have I blown it up somehow, if not anyone got any clues?

Martin 'Bud' Johnson

 

[RikoRocket]

There are some small 3 legged chips, when they blow you can normally tell by either a wacking great hole in the device or a round bump.

 

[GregK]

Here's one I blew earlier ..........
View attachment 9591

As you can see, NO2 is well cooked, often the evidence is just a very small bump.

 

[MPJBud]

Nothing like that, but I have checked power is coming through the braids but nothing is coming out so the chip so I guess I need to try another chip.

 

[GregK]

Did it work without the body screwed down? If so, check the condition of the wiring ....... just in case you pinched them when you replaced the body.

I have been caught out before with a dodgy motor caused by a partly jammed rear axle with the usual fluff 'n' stuff. That will blow a motor in the way you describe.

Tip Wizard: always test your car runs in analogue mode before chipping

 

[Michael363672]

Martin does the motor turn with just a 9V across the terminals of the motor ?

Take the motor out of the car and see if you can get it spinning up on its own

Doubt it would be the chip as can't see how you would have blown it up

Sounds more like a cold solder joint on the motor if anything unsloder it at the motor and re solder that joint

Michael

 

[MPJBud]

It only runs if I unsolder the motor from the chip,if I resolder it then it stops working again with 9v across the motor

 

[RichG]

May not necessarily cause a problem, but not a good idea to connect 9V across the motor when the chip is also connected to the motor.

Try removing P03 (Brake Mosfet) and see if the car runs then?

Rich

 

[Michael363672]

QUOTE It only runs if I unsolder the motor from the chip,if I resolder it then it stops working again with 9v across the motor

First I would swap the wires over as they may be the wrong way round on the motor

If that doesn't do the trick

It sounds very much like their is a break in one of the wires or with the ferrite man and bits

I would remove those bits and solder the wire directly to the Motor and it should work

If not bring it Thursday and I will have a look

Michael

 

[MrFlippant]

I'm with Rich. You might have killed the chip permanently by putting the battery on the motor with the chip still attached. That's how I killed a chip once.

Once.