Fixed my shot Chrony

gelandangan · Posted: Sun Jan 13, 2008 5:29 pm Post subject: Re: Fixed my shot Chrony

The 10mm plate is NOT to protect it from direct shot. Only for debris.

If you directly shot your chrony, then you deserve to pay for a new one Very Happy

Dimitri · Super Member Joined: Nov 25, 2005 Posts: 5948

I wonder how much armour I'd need to use for my M1A with AP rounds to protect a Chrony. Shocked

Dimitri

gelandangan · Posted: Sun Jan 13, 2008 10:06 pm Post subject: Re: Fixed my shot Chrony

Dimitri wrote:

I wonder how much armour I'd need to use for my M1A with AP rounds to protect a Chrony. Shocked

Dimitri

I think an ordinary house brick placed lengthwise in front of a 10mm plate would be adequate.
Or, you could try to aim directly at the chrony UPSIDE DOWN 3 feet away using a scoped M1a Very Happy

SwampFox · Posted: Mon Jan 14, 2008 9:16 am Post subject: Re: Fixed my shot Chrony

D,
The best idea is not to shoot the darn thing. But, do get yourself a untit with the guts on the bench, just in case.
Ed

PaulS · Posted: Wed Jan 16, 2008 1:20 am Post subject: Re: Fixed my shot Chrony

Dimitri wrote:

I wonder how much armour I'd need to use for my M1A with AP rounds to protect a Chrony. Shocked

Dimitri

You need 1" of armor or about 1 1/2" of T1 steel.

grey_ghost · Rookie Member Joined: Apr 07, 2013 Posts: 2

gelandangan wrote:

Well.. after two weeks I found some time to fix my shot Chrony.
It wasn't damaged as bad as I think.

I will gradually make modification to shot proof it later.

I have two questions about componetns located at PCB of Shooting Chrony Betta.

What marking has chip located at right bottom corner of PCB ?
What marking has capacitor located near this chip (top left corner of chip) ?

gelandangan · Posted: Mon Apr 08, 2013 3:56 am Post subject: Re: Fixed my shot Chrony

Welcome.

The chip as far as I remember is an EEPROM from Microchip, I think it is an I2C variant.
The blue capacitor is a standard decoupling, 100nF for it.
IMO, you do not need this EEPROM if you are not using it for shot memory,
OTOH if the uC pinsg and waits for it to respond, it may hang the system altogether.

If you do need it, IMO, any I2C EEPROM from Microchip would do since it usually have the same pinout.

Vince · Posted: Mon Apr 08, 2013 5:00 am Post subject: Re: Fixed my shot Chrony

Gelan...you are the electronic wizard here mate...would the cost of building a chrono be more than buying a similar unit ready to go?

TRBLSHTR · Posted: Mon Apr 08, 2013 9:21 am Post subject: Re: Fixed my shot Chrony

A few years back I bought one of those top-o-line chronys(gamma master?)with the printer and external brain,but I did'nt like the opticle sensor rods(aluminum)so I changed to wooden dowels-just in case I was having one of those bad days and might hit the aluminum rod and damage the op-sensor.I then went a bit further and added some white pvc tubing to slip over the dowels with the minimum and maximum shooting heights noted by colored electrical tape for keepng the bullet at the correct distance above the op-sensors.To finish it off I added a couple of pieces of 3/4" steel plate at 35-45 degrees to help the bullets stay out of the op-sensor-needless to say this stuff is getting heavy-so I used an old tripod from a twin quartz halogen portable stand light to be able to support it all.Took some work-but it's at least 50%dummy proof!!!!!!!!!!! Shocked

grey_ghost · Rookie Member Joined: Apr 07, 2013 Posts: 2

Thanks.

gelandangan wrote:

The chip as far as I remember is an EEPROM from Microchip, I think it is an I2C variant.

Can you lookup at exact marking ? Memory capacity is still unknown.

gelandangan wrote:

The blue capacitor is a standard decoupling, 100nF for it.

Marking is 104 (10 * 10000 pF).

gelandangan wrote:

IMO, you do not need this EEPROM if you are not using it for shot memory, ...

EEPROM can be used as storage for device configuration.

Bushmaster · Posted: Mon Apr 08, 2013 11:55 am Post subject: Re: Fixed my shot Chrony

Hummmm...Wonder who will win this one...??

DallanC · Site Admin Joined: Jan 18, 2005 Posts: 3572 Location: Utah

TRBLSHTR wrote:

...but I did'nt like the opticle sensor rods(aluminum)so I changed to wooden dowels-just in case I was having one of those bad days and might hit the aluminum rod and damage the op-sensor...

I use a couple wood shisk-a-bob skewers over the metal rods, "just in case".

-DallanC

gelandangan · Posted: Mon Apr 08, 2013 2:24 pm Post subject: Re: Fixed my shot Chrony

grey_ghost wrote:

Thanks.

Can you lookup at exact marking ? Memory capacity is still unknown.

I have to find time to dismantle mine, will post a better image once I do.

Quote::

EEPROM can be used as storage for device configuration.

It could be, but I sincerely doubt it.
Short of taping the I/O to watch the traffic, I wouldn't know exactly.

Good luck mate, please post your findings so others could benefit.

Dimitri · Super Member Joined: Nov 25, 2005 Posts: 5948

Vince wrote:

Gelan...you are the electronic wizard here mate...would the cost of building a chrono be more than buying a similar unit ready to go?

One off electronics are expensive as as buying a Holland & Holland Rifle.

At the 50-100 quantity it becomes more reasonable, at 1000 it becomes commercially viable like one of those Turkish double barrelled rifles.

Dimitri

PaulS · Posted: Mon Apr 08, 2013 7:53 pm Post subject: Re: Fixed my shot Chrony

grey_ghost wrote:

gelandangan wrote:

Well.. after two weeks I found some time to fix my shot Chrony.
It wasn't damaged as bad as I think.

I will gradually make modification to shot proof it later.

I have two questions about componetns located at PCB of Shooting Chrony Betta.

What marking has chip located at right bottom corner of PCB ?
What marking has capacitor located near this chip (top left corner of chip) ?

Grey ghost,
That chip that you have circledat the bottom right looks like it could be a 555 timer chip, but the one that is broken looks like an eprom.
I could be wrong there are other 8 pin ICs out there.