making 24 to 12v step down power supply.

LM2596 is only supply max 3A. and 
even 3A is became too hot 

so instead of LM2596, I tried to make power supply using same principle like LM2596, 
using inductor and capacitor with maxium pwm speed of AT328p 4Mhz. 
faster then LM2596, so if i using right inductor and capacitor , then can make power supply using 30-50A mosfet. I successfuly create 4Mhz pwm using ARDUINO, and then when I using pulse signal 5v to make amplifed 12volt to control MOSFET. but signal became flat... I think, none of transistor or optocoupler, is not fast enough to fallow speed in my hand .I am not sure exist one. so last trried,  I connect to LM2596 output signal to mosfet Gate pin, Mosfet is not fast enough as well..

So far I fail.
but I tried to make LM2596 - 12v fixed one 
But I can not make  3-5 paralle circuit to make power supply 24 to 12v .../.
will not even power load on LM2596 , possibly burn one LM2596 first.

but first have to test and LM2596 need to precies.

HOW TO WIRING PWM MODULE AND WHY?

Sometimes, I am still confusing to wire up such as LED light with dimmer functions with using PWM module. MAYBE ONLY ME. ANYWAY PWM MODULE has lots of different LOOKS from like this fancy one to small and cheap on like thisPWM POWER CONTROL KEMO M195 9-28V/DC, MAX. 20A
PWM DC Motor Speed Controller Speed Switch Module 6V/12V/24V/28V ... 
but it has same function and do the same job. but most different is how much current they can handle.
bigger size maybe more bigger mosfet and bigger heat sink and that make more power can through.
Please check MAX current.
SO,
If I am installing simple LED strip light about 3amp of power then, I will use 5 amp fuse and choose PWM MODULE that can handle 5amp easy.
this is diagram for  KEMO MODULE
M171 PWM Power control 9 - 28 V/DC, max. 10 A

without any mark diagram make confusing me. this is need polarity mark like this.
One of Confusing of PWM module is Why they need to connect like this.
the reason is they need consumer earth to control PWM, not positive power side .
that is why need four wire.
SO I cannot use common earth or chessie body earth for consumer.
Consumer earth is controlled like : on, off, on, off, quickly inside kemo module.
so more explain
and this little module has four wire and easy to understand how to wireup.

problem is my torque converter locked up (peugeot 308 engine stall and died at signal & shudder at highway driving)

Thursday After work the way home I experence My car go to limphome mode and stuck to 3rd gear and I could not drove more then 80k and RPM was like 5000 with diesel engine, .......
bad simptom was started 2month ago it was not seriouse, and now I think problem is my torque converter locked up (peugeot 308 engine stall and died at signal & shudder at highway driving) because only I think of engine stall at stop, is clucth locked up in this case is torque converter and when highway driving about 5th or 6th gear seems shuddeing like engaging disengaging problem I thought my self maybe oil problem, but now I thinking this is the proplem'
TCC valve / solenoid.

My peugeot has Aisin AM6 auto transmission. when I search the parts I found that also called TF80SC.
other manufactur use same Aisin Transmission but different name on it.

Common Complaints with AW 6 Speed FWD

Complaint:
  • Harsh up or downshifts
  • TCC slip, fluid overheat
  • RPM cycling at low speed or coast
Cause:
  • TCC clutch is not releasing or loss of TC modulation control
  • Torque converter clutch control valve bore worn and/or secondary regulator valve bore worn
Diagnostic Procedure:
  • Monitor converter release pressure to verify the clutch is being controlled. If release psi remains low (see chart) during up/down shift, the control valve is not stroking. Compare the release pressure to TCC solenoid amperage. For overheated conditions, also monitor cooler flow (see chart).

and I suspect and I hope is valve solenoid it self not valve body or valve worn otherwise it has to change all valve body.
so I give it shot 
I bought this 
Postage:
FREE Expedited Shipping from China/Hong Kong/Taiwan to worldwide See details
Item location:
Hongkong, Hong Kong
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Delivery:

TF80-SC 8Pcs/Set Transmission Valve Solenoids Replacement Fit for C30/C30R 10-11


Feature:
1. Constructed of high quality iron material for maximum durability.
2. OE part number for reference: TF80-SC, TF81-SC, TF80SC, TF81SC.
3. Professional manufacturing, high precision and long durability.
4. Easy to install, you can directly replace old or damaged parts
5. Particularly fit for C30/C30R 10-11 2.4L.
Specification:
Condition: 100% Brand New
Item Type: Transmission Solenoids
Material: Iron
Color: As Pictures Shown
Manufacturer Part Number: TF80-SC, TF81-SC, TF80SC, TF81SC
Fitment:
Fit for C30/C30 R 10-11 2.4L
Fit for C70 10-11 2.4L
Fit for S/V60 05-11 L4 2.0L 2.4L V6 3.0L 3.2L
Fit for S80 06-11 2.0L L5 2.4L 2.5L V6 3.0L 3.2L V8 4.4L
Fit for V70 01-11 L5 2.4L 2.5L V6 3.2L
Fit for XC60 08-11 2.0L L5 2.4L V6 3.0L 3.2L
Fit for XC70 07-11 2.4L V6 3.0L 3.2L
Fit for XC90 05-11 2.4L V6 3.2L V8 4.4L
Fit for ALFA ROMEO
Fit for 159 06-10 1.9L 2.0L L5 2.4L V6 3.2L
Fit for BRERA 05-10 3.2L
Fit for SPIDER 06-10 3.2L
Fit for CITROEN
Fit for C4/C4 PICASSO 06-11 1.7L 2.0L
Fit for C5 04-11 2.2L V6 2.7L 2.9L 3.0L
Fit for C6 02-11 2.7L 2.9L 3.0L
Fit for C8 05-08 2.2L V6 2.9L
Fit for FIAT
Fit for CROMA 05-11 1.9L L5 2.4L
Fit for ULYSSE 08-10 2.2L
Fit for Lancia
Fit for DELTA 09-11 1.8L
Fit for PHEDRA 08-11 2.2L
Fit for THSIS 05-09 2.4L
Fit for OPEL/VAUXHALL
Fit for ASTRA 06-11 1.9L
Fit for INSIGNIA 08-11 2.0L 2.8L
Fit for SIGNUM 05-08 1.9L 2.8L 3.0L
Fit for VECTRA 05-08 1.9L V6 2.8L 3.0L
Fit for ZAFIRA 05-11 1.9L 2.0L
Fit for PEUGEOT
Fit for 307 06-08 2.0L
Fit for 308 07-11 2.0L
Fit for 407 06-11 2.0L V6 2.7L 2.9L 3.0L
Fit for 607 04-10 2.7L 2.9L
Fit for 807 06-10 2.2L
Fit for 3008 09-11 2.0L
Fit for 5008 09-11 2.0L
Fit for RENAULT
Fit for ESPACE 06-11 3.0L
Fit for VEL SATIS 05-09 3.0L
Fit for SAAB
Fit for 9'3 06-11 1.9L 2.0L V6 2.8L
Fit for 9'5 10-11 2.0L V6 2.8L

Package List:
8Pcs/Set x Transmission Solenoids

Wiring diagram for Ford Falcon BA to make start car using smartphone project.
















please test relay module before installation.

Immobilizer need key to start engine.   not recommand to work on immobilizer like I did. Can cause starting problem. (please be caution work on Immobilizer.)

Every car is special


I work for auto industry for many years as technician I feel some uncomfortable about some gaps between luxury and just normal brand reasonable priced car.

when I see the luxury brand,  that make me feels like I am fall behind because I can not afford to buy car which has so many advanced functions and expensive and secret tech they do not want to share.
(And Actually I still want to have Luxury car..)

they may want to distinguished from average and  looks special.

I respect and understand luxury auto markets


But, I think even normal reasonable price old car can be special, unique, important.

regardless of price, brand, model or old or new.

Every car is unique and special.


So I want add some special features on my car that make my car more unique and make me happy.


I believe My car can be different and is special then any other luxury brand car.

constraint layout learning

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