Anyone bought Infrared LEDs t0 repair their Cheap Chinese chrono

[averageplinker]

Hi All,

My cheap Chinese Chrono requires an LED replaced as it has been broken when I put it away clumsily and forgot about it for a few months.

It looks like all I need to do is find the appropriate led and then dig out the soldering iron.

So has anyone done this, and where did you get the LED from?

Cheers Rich.

[bighit]

Some one on the other forum fixed his. He just bought a random IR LED. It was bigger than the original but still works fine.

One from an old TV remote may work.

Or check E-bay.

[averageplinker]

Some one on the other forum fixed his. He just bought a random IR LED. It was bigger than the original but still works fine.

One from an old TV remote may work.

Or check E-bay.

Cheers, was wondering if they were anything specific but sounds like any old IR led will do

Need to get it fixed to use on things I can't mount the combro on ��

[bighit]

Cheers, was wondering if they were anything specific but sounds like any old IR led will do

Need to get it fixed to use on things I can't mount the combro on ��

This what he said .

In short, it was either buy in bulk of 10's or wait a few days for delivery. Neither appealed to me. To a simpleton like myself, an LED looked like another LED and there wasn't much spec difference from one to another apart from wavelength. No doubt frequency is an important factor.

I decided to take donor parts off a redundant tv remote control and proceeded to replace the shot LED. To my surprise, it worked equally well and a side by side comparison with my other 2 chrono's, it gave virtually identical readings. I left the LED legs long so I can align the LED to the sensor in the roof. Well happy with the results.

I am lucky in having 4 chrono's to double check. On this occasion, this repair worked well and and equalled the other chrono's on accuracy. I may have been lucky to find an LED of exacting spec so the unit performed to design. A quick, cheap and satisfying fix.

Please bear in mind a different LED off a different remote may not work to the same level of accuracy so use another chrono to check your new reading.

[noz1]

The LED needed is a 850 nanometers wavelength one.

[Phil Russell]

It is well worth a try... especially given the information above.
I bought one of the very first Skan units that had rows of LEDs and only gave velocity ... mid 1980s? ... and several years later managed to shoot a couple of LEDs out of it. I bought some the correct size from Maplins (we had one here at the time) and fitted them. Hey ho ... it worked and comparison with the new Skan I had bought showed it to be just as accurate. I keep the old unit for fun and nostalgia.
Cheers, Phil