Diesel Generator Auto Stop Circuit

There are two kind of design analog and logic and for small pcb board .if you are familiar with this type of microchip processor pic16f675a(SIMD package) i can provide you with the circuit design and the software of the program without need for Triac instead of it you can use two resistance and one diode .the second design uses the O.P amp. LM358 (2*O.P inside the chip)(SIMD package)one is used as switch for (on-off) signal that electric is exist and the other use as the timer . if you want any one i ll do

the one using the LM358 would be easier to repair while the one using PIC will be easier to assemble.

I would love to see both of these to gain something from each.

Thanks.

I was trying to post but i encountered some problems with post i don't know the reasons .anyhow . if you wish to design PCB for this schematic diagram i will send to you the hex file there is no need to Assembly language .L is the solenoid P621 is used to isolate the 220 vac from the battery for safe . you can use the equivalent .R1 should 2W. at less . S is the switch of the engine .if you have any question you welcome

Are solenoids, at your power supply voltage, not available?

they are available in plenty. but once energised, who will switch it off? there comes the need of a monoshot.

the monoshot will keep it energised for about half a minute and then switch it off.

if the solenoid is continuously on, fuel will always be off for the generator.

hence the need for a MAINS OPERATED MONOSHOT.

Wire the solenoid through a time delay relay.

we all have seen that for this particular application, no one uses a TDR. Normally it is accomplished using an electronic circuit.

What is the operation voltage of your solenoid and d.c or a.c and how is your generator doesn't have battery . is your solenoid designed to use for generators

thanks for your comments.

manually started small domestic generators ..... especially the lister petter type.... which dont need to a battery to start...... you just need to crank with a handle. hence in such generators you normally wont find a battery....... that saves some money.

the circuit arrangement i am talking about is based on an unknown 14 pin ic

it uses very few components just a rc combination for time delay and drives a relay which eventually drives the solenoid.

please help me identify this ic...... looks similar to 4060 but that is 16 pin. please help

thanks

This circuit has to perform three functions ,delay time,drive and input control .chose the value for each of R and C to adjust the 30 sec.start with R=10M ,C=47UF. (use the math. relation of TIME CONSTANT to find out the R*C and use Vc=9.25volt and VCC=12volt to count R,C for accuracy if you want ).increase the value of R and decrease the value of C in order to get small size of C .

thanks a lot for the circuit.

I am looking forward to your circuit built around LM358 op amp. also please comment on programming the PIC

The one using PIC is a decent circuit but i feel the commercially made solenoids use far lesser components to save money and yet work effectively. its just that there are many solutions to a problem and commercial circuits are usually the cheapest solution... safety and longevity can be compromised by them.

you have operated the solenoid from battery and got the sensing voltage from electric company supply. I was keen on running it entirely on mains without the battery....... for generators without battery....... manually started type. sure the sensing voltage will still come from electric company point.

thanks once again for your circuit. please continue to respond.

If the solenoid is rated for continuous on, why do you want to automatically turn it off? The solenoid will turn off the next time you lose power, or you can temporarily turn it off to do a generator test.