What happened at your workbench today?

casey jones snr said:
Jon, it was an 8 x 1.5 NiMh battery pack from Strikealite. I inadvertently wired it up wrong effectively causing a short. There was no inline fuse in place.
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Nice red glowing effect from the wires - I managed that with my first battery-powered loco. It wasn't a wrong polarity issue, but I was using an audio jack plug for charging, and there was no in-line fuse. The audio jack causes a momentary short when you insert / remove it, and that set the batteries off.

For a while, the diesel loco looked as if it had a very realistic start-up smoke module :nerd::nerd::nerd: but I burnt my fingers trying to rip out the wiring :lipssealed::lipssealed:
 
Possibly a 'niggle' or an 'itch'?

Something that touches a nerve, or grates, because it is not technically correct..

PhilP
 
Rhinochugger said:
Nice red glowing effect from the wires - I managed that with my first battery-powered loco. It wasn't a wrong polarity issue, but I was using an audio jack plug for charging, and there was no in-line fuse. The audio jack causes a momentary short when you insert / remove it, and that set the batteries off.

For a while, the diesel loco looked as if it had a very realistic start-up smoke module :nerd::nerd::nerd: but I burnt my fingers trying to rip out the wiring :lipssealed::lipssealed:
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Ah moral 2 a couple of lessons here, always use a fuse and always have the battery turned off when inserting charging plug. I have blown a few fuses inserting a jack socket to the charging loom, lesson well learnt particularly with gllass fuses and none in stock to replace blown one. Have many that have had fuse wire soldered on!
 
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dunnyrail said:
Ah moral 2 a couple of lessons here, always use a fuse and always have the battery turned off when inserting charging plug. I have blown a few fuses inserting a jack socket to the charging loom, lesson well learnt particularly with gllass fuses and none in stock to replace blown one. Have many that have had fuse wire soldered on!
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Yep, this was a long time ago, when I built the Yeti, probably 15 years or so. Fuses became mandatory for me after that, and audio jack plugs were never used again :shake::shake: ( a bit too bulky anyway).
 
As regards connecting battery leads to batteries, if I remember correctly from my fire brigade days, connect the positive and then the negative and disconnect in the reverse.
 
playmofire said:
As regards connecting battery leads to batteries, if I remember correctly from my fire brigade days, connect the positive and then the negative and disconnect in the reverse.
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Yes, the other mild attack of the vapours that I had with NiMh was when connecting a pair of 6v packs in series. Having prepared the leads and connected the the red-to-black pair, one of the stray leads decided to wave itself in the air, and touch a wrong 'un - I was only alerted to the fact that the pack was getting warm :oops::oops:

Probably the moral to that, is not to strip and prep the second set of leads until you're ready to go on with the next stage :nerd::nerd:
 
Whilst the rain has been falling, I've started another coupling up grade on one of my Beyers,
From this
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To this
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And the front
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20221118_222134.jpg
20221118_221959.jpg
 
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