Ultrafire wf-501b mods not working properly

LED Flashlights – General Info 18650 Flashlights
1

Hello guys!

I just got the Ultrafire wf-501b and after playing with it for a while, I noticed some strange defect(?) If I understood right, current flashlight has 2 second memory, which basically means it remember last mode if I wait more than that period of time before switching on again. Well, in practice it skips to next mode every time, no matter how long i wait. Considering the fact that it has 5 mods, it is pretty frustrating to tap 4 times to get the mode I want. Correct me if it works as it should!

So what you guys think causes this problem? I first thought of tail cap being faulty and tried to disassemble it, but I don’t really understand how. Before braking anything, I decided to ask here first.

Here is the picture of my tail cap:

[Album] Flashlight
2

It is not the tail cap. You need a new driver. Which is under the LED. Look like this!! {width:50%}

3

Most likely it uses ‘on-time’ memory… which means it should remember the mode you used with flashlight ON for 2-5 seconds (as opposed to OFF for 2-5 sec). So try leaving it on for a little whike and then turn it off, and see if it comes back on the same mode when you turn it back on.

The vast majority of stock flashlight firmwares that have mode memory work that way - despite ‘off-time’ memory being more intuituve.

If that doesn’t work… the fault is in the driver (might not be ‘faulty’ apart from faulty advertising), almost definitely not in the tailcap.

4

Look here.

5

What I meant in the above post with pictures is just for the reference and it is the driver issue, not the tail switch issue. Just as some of you said in above posts……

But in my opinion….
This host and the drop-in price being considered…. It should be best to just get a better light with a better driver? (Seem the OP is inexperienced in modding, Just as I’m :bigsmile: )

Again,
Cheers

6

Sounds like the infamous “next mode” memory where the light always comes on in the next mode regardless of off or on time duration. As I recall the solution was either use a pencil to create a high impedance path across the appropriate capacitor, swap the driver out, or pop in a new p60 drop in if unable to solder. Best to ask about prospective drop ins before purchasing or you could easily get the same problem again. Search “next mode memory” if you’re curious and self motivating.

7

Thank you guys. It seems to works just like grantman321 said, sadly. Just ordered new driver ardvaarks mentioned in his comment!

8

When you get the new driver, install it, sure your light will be much brighter using it and will have better mode selection.