I'm trying to make a 300zx clock run on a battery. I was all confident but I cant make it work.

 

 

I thought the clock was a serviceable item. So I assume the battery has insufficient current???

 

I have been using crocodile clips and short lengths of wire to try and get it to do something but there are no signs of life at all.

 

Any ideas? And does anyone know which wires are which. I thought black was earth, blue was live and the others are to dim it.

 

Help please.

Delete it with fairlady z led or 300zx look much better

 

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I'm trying to make it function as a fun little curiosity in my trophy cabinet

I'm trying to make it function as a fun little curiosity in my trophy cabinet

Good luck i delete it for good cuse some times its works some times not

 

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I'm trying to make a 300zx clock run on a battery. I was all confident but I cant make it work.

 

[ATTACH=CONFIG]110189[/ATTACH]

 

I thought the clock was a serviceable item. So I assume the battery has insufficient current???

 

I have been using crocodile clips and short lengths of wire to try and get it to do something but there are no signs of life at all.

 

Any ideas? And does anyone know which wires are which. I thought black was earth, blue was live and the others are to dim it.

 

Help please.

 

Lovely idea Tom.

 

Hope someone can help you out with the wiring.

I think it's a milliamp shortage... When it didn't work I tried every combination of + and - wiring

 

A xar battery would be a bit heavy in the glass cabinet :lol:

12v transformer would help :)

Oh good point. So could I try something with a laptop charger or phone charger????

 

- - - Updated - - -

 

I'm going to go bang aren't I :lol:

And it should be two + and one - . One + for memory and one to turn it on

Here is the schematic Tom. The clock relies on two +12v supplies (one for running with LED display on/key in and the other for

no key in). Ground wire and two wires to control dim display when lights are on. You can work out the colours from the

clock's chassis plug and the diagram.

 

el-68.pdf

 

I've ammended the above description Tom as there are *two* connections to the illumination control system.

 

Clock's chassis plug colours:

R/Y (red/yellow stripe) is to illumination control system

LG (light green) is swiched +12v (ignition key accs)

B (black) is ground

R/L (red/blue stripe) is to illumination control system

Y is constant +12v

Edited January 6, 20187 yr by AndrewG

So having tried every combination.

 

Either the clock is dead or the battery is providing the wrong flavour of electricity?

Was the clock working when fitted in the car before?

I thought it was yes. I'm going to go and power it up in the car.

 

 

C'mon you little...

Correct me if I'm wrong. I could wire the clock straight to a car battery? It wouldn't blow it up.

It will be fine

 

I won't be long.

 

If I'm long, Rolandas you're a murderer! :lol:

Correct me if I'm wrong. I could wire the clock straight to a car battery? It wouldn't blow it up.

 

Personally I would have an inline fuse (say 1amp) between the battery +12v and the crocodile test lead going to the clock.

I'm not dead but I think the clock is. Not a thing happened

 

That clock does not work. I have had it clipped up to the zed battery every which way.

 

I took my radio fascia off and looked in. The yellow chassis wire connects to the blue clock wire, and the black to black. (for future me to check).

 

So next job, fix the clock!

Put it in a pillowcase and then in a plant pot and stick it on a 60degree quick wash. Normally sorts them out.

Not quite the advice I expected :lol: if changing the resistors doesn't work I may give it a try!!!

Pictures :) So O shpuld have given up, but I did an autopsy...

 

 

Look at that mark on the LCD. I bet thats the problem

The conical mark on the display itself is normal for this type of device - a vacuum fluorescent display. We were being lazy calling it an LCD.

 

The condition of the IC on the back however is not normal, and suggests that it has been fried (heat damage). Possibly by connecting

the power supply up incorrectly.

IC... er... Integrated Circuit? You mean the millenium bug in the middle! The discolouration looks like it has a sort of varnish or sealant on the pins but not in the centre.

 

 

It's good to try things and learn about stuff. Sometimes (yesterday morning) I feel like I can fix anything, other times (more recently) I feel like Homer Simpson :lol:

 

I was looking for burned bits, lifting tracks, breaks, loose bits. But to my novice eye didn't spot whatever you can see Andrew.

So hard to fault find in small circuits but very interesting thread Tom and dont give up.

What an entertaining thread, keep it up !!

 

I'd give the pcb a damn good drenching with some contact spray - hell what have you to lose :wacko:.

 

Connecting little batteries are a waste of time, 12v mains is the way to go - loads of products run off 12v, go and chop up some of your christmas decorations/lights and use their supply.