Author Topic: Retry N1001  (Read 4439 times)

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« Reply #136 on: August 12, 2018, 02:02:56 am »
to do this pcb is easy with photosensitive paint

once you have the circuits board masks printed and they must be a negative print

the first step is to apply a spray varnish on one side of the pcb and wait to dry to protect from the first corrosive step... put in front of a ventilator to speed up drying

second step is to clean the other side of the pcb with bom bril (iron brush) 

third step to apply the photosensitive paint..you must work on a low light condition! do it once with a soft pincel in one direction only than leave it dry in front of a ventilator than repeat the application using the pincel in the perpendicular of the original direction you chose..

fourth step is to get the transparency over it and apply florecent light for a couple of minutes

five you must drop the pcb in a 70% alcool vessel and use a piece of cotton to brush and gently remove the part of the paint that has not being cured by the light ..

six corrode the pcb

seven make some centering holes that will be useful to center the other mask and take off the varnish from the other side and clean it...

eight apply varnish to the side of the pcb you just corroded (like first step)

go back to the second step and use the other mask to do the other side of the pcb



« Last Edit: August 12, 2018, 03:37:42 am by sebosfato »

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Re: printed version
« Reply #137 on: August 12, 2018, 13:28:39 pm »
here is what im working with

the circuit schematic and the pcb

im doing a photographic process at home with photosensitive paint so i had to invert the colors and print a transparent of the the top and down side ... so the pcb will have to be drill hole by hole but there is less holes as possible since that why i chose to use a kind of smd pcb for part of the pins... most of the supply pins 'has holes also valid fo'r components but mostly where the signals had no way to go i changed layer

there are some signal jumpers to allow it to continue or to allow to simply interrupt and let it else where like on the freq dividerts etc

hope you enjoy


I am so impressed!
Well done, bro!

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Re: Retry N1001
« Reply #138 on: August 12, 2018, 14:05:23 pm »
thanks bro happy that you like it!

i´m doing some minor corrections to the drawing while i will build it so soon i post the new updated drawings for you for if anyone wants to build their own

i´m trying to get more organized perhaps that was something important that i never gave any importance before and now is helping me get more vision of what i´m doing.

i was testing the components today before the soldering process.. and i found something that freak me out for a minute .. the cd7046 output was high instead of low when the pin 5 (inhibit)was brought to high,  i dont know why but it works correctly when the nor  logic  is connected ... seemed very strange and i was afraid it was not working well but now i´m confident again with it... ha


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Re: Retry N1001
« Reply #139 on: August 13, 2018, 22:36:22 pm »
Pcb down side before corrode00
« Last Edit: August 14, 2018, 22:07:44 pm by sebosfato »

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Re: Retry N1001
« Reply #140 on: August 15, 2018, 00:58:01 am »
i have a little problem with the lm741 of the scanning circuit... it only goes from 2v up i would like it to go down to 1.25 volts ... any one know what i can do ?

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the baisca car system with gas
« Reply #141 on: August 15, 2018, 04:14:35 am »
hey

for the car to work we need:

clock signal from rpm

circuit that generates a fixed width pulse for each clock signal in (this is the idle)

when we accelerate the frequency of the clock  signal increase automatically so the distance between the pulses become smaller and so the gas production increase with the rpm.. but if there is no pressure left when you accelerate perhaps the engine will die.. .

the pressure sensor cut  the production of gas when it reach a certain pressure normally

but to get a nice operation we should have two states

one accelerating

one not accelerating

basically than we need a minimum pressure to be maintained in the cell to be able to accelerate instantly while the rpm don´t increase

and perhaps a manner to increase the pulse width according with the acceleration pedal


the gas management will be needed to fuse it




 


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Re: Retry N1001
« Reply #142 on: August 15, 2018, 10:14:12 am »
(just a thought)One solenoid valve for idle and 7-10  small-micro solenoid valve calibrated for accelerating.?

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« Reply #143 on: August 15, 2018, 14:59:21 pm »
(just a thought)One solenoid valve for idle and 7-10  small-micro solenoid valve calibrated for accelerating.?

Hey man good to hear from you.

I´m thinking to reduce the components at maximum

i sleep over this idea and came up with this

the cell will need a minimum pressure to work with since the gas need a pressure difference to flow it seems reasonable to have at least 2 psi of pressure to start with

i believe to get the gas ionized into the engine the main idea will be to deliver the gas thru a silicon tubing directly or very close to the combustion chamber... all the parts must be cover with plastic coating or corona dope.. after all we dont want to loose the ionization and or it to explode before time

to deliver the gas with safe i thing the gas injector must be connected to the air line like with a tube inside the other! this way the hydrogen wont be released continuously and therefore in case of a explosion it wont be able to reach the cell

meyer talk about this quenching process mixing non combustible and air gases with the hydrogen prior to transportation thru the line.. he had a heat sink for the exhaust gases if i remember well

so basically the positive air flow suction by the engine will intercalate with the hydrogen within the line making it safer to transport up to the combustion chamber

the car rpm is control by the amount of power each stroke (normally the buterfly control the air intake when you press the pedal it open allowing air and fuel to go inside)

so it generate a clock signal that is variable in frequency from something around 10 up to 100 hz so it gives us the region of 5ms of injection time as a maximum and perhaps 1ms as a minimum for idling therefor all it takes is to get a acceleration control is to have a monostable timer 555 connected with a light variable resistor assembly on the pedal (this work as a potentiometer basically is an arrangement of leds and light sensors connected in series such as to have something that comes out from inside when you accelerate that allow the sensos to be illuminated as it goes out) to control the injector timing.. the injector timing vs pressure will determine the acceleration

so if im going to set the pressure to a predetermined value and leave the gate to a maximum duty cycle on the pll side to simply have a stable pressure

when i press the pedal the timing will change but only for the injector

this signal of the injector also will preceed the electron extraction signal! i came to this conclusion because if we want to ionize the gases it must be done right close to the injection port because it takes real small time for it to lose its ionization...

this may be one of the main reason why meyer chose to inject on the spark plug

the injector timing circuit can get more elaborated if we add the pressure sensor to it to compensate automatically on the timing of the injector for the pressure change

for example if you have twice the pressure for the same time in injection you will have twice the flow or so therefore is easy to create a circuit to compensate for that too

this is the gms

what control the injector so basically is a monostable circuit trigered by engine's clock compensated with the pressure to achieve constant flow controling it on time independent of pressure withing certain limits.. also connected to the accelerator that increase the time it remain on proportionally to the pedal acceleration.. so it needs two potentiometers to define the idle and maximum acceleration

i believe the arduino could be useful here to create all this reading of sensor and control of timing since its very low frequency it should not be a problem for it..  may be easy as one 2 3

obs thinking about what you just said p85 it made me think of something

if we reduce this pressure limit than to a minimum the cell will be basically operating on demand so instead of the compensation for pressure the accelerator could directly than command the extra energy needed for acceleration by increasing pressure.. like if we set idle working on demand means that if we increase the hydrogen production it will increase rpm because of increase in pressure.. (of course if its not compensated as illustrated before or compensated only up to a certain point)


lets take the arduino example to easy engineer this

lets say we use a potentiometer 0-5v for the accelerator (one analog input)

the clock will come from the car of course go to a digital input

the pressure sensor go to a analog input

we can add a frequency reading to stabilize the loop using the clock from engine... 

than we create a program that takes the accelerator at 0v as the idling point..

at this point the frequency will be stable,

 if it senses it increase it proportionally reduce the injection time ( if the accelerator is at 0v)

if the pressure reduce for example it must increase the injection time or if it increase it will reduce this time

so i think of creating a variable the timing of injection

and its value will be sum or subtracted every cycle to compensate..
 for example:

if the pressure double the time will be divided by two but if the frequency increase every cycle it decrease say 100us of the injection time until it stabilize the rpm

the time is a variable so it can be set initially and have boundaries if you want but it can float

like a pll or pid

than when we accelerate the voltage is different than 0 and we can set that for each volt it will increase the timing proportionally of the injector

or and allow the pressure to increase some extent to allow acceleration on demand by directly producing more gas

i like the flexibility of it

however we need to have an analog circuit for cutting the gas production and also a pressure relay to open up the dc when the max pressure is reached in cause of malfunction with an alarm that sounds with it being reached!

the best would be to use 2 or 3 sensors for safety!

 









 

« Last Edit: August 15, 2018, 15:26:28 pm by sebosfato »