Need help removing timer from PCB

Thread Starter

[CC]

Joined Jun 16, 2023
5
I have a model kit that comes with an LED kit and it has a 5 minute timer for the LEDs to stay on, then it'll turn off. I want to remove that timer so that the LEDs stay on indefinitely until i cut off the power or press the button to switch to a different lighting mode.20230616_020113.jpg20230616_020138.jpg20230616_020142.jpg20230616_020148.jpg20230616_020152.jpg20230616_020206.jpg20230616_020215.jpg
 

sagor

Joined Mar 10, 2019
894
Since you say it has different modes, i suspect the 16 pin chip is what controls things. It might be a programmable processor. U1 I would suspect is a voltage regulator. Without chip part numbers, the pictures say little…
If the chip is a microprocessor, you likely will not be able to change the timeout without the source code and a programmer.
 

Thread Starter

[CC]

Joined Jun 16, 2023
5
Since you say it has different modes, i suspect the 16 pin chip is what controls things. It might be a programmable processor. U1 I would suspect is a voltage regulator. Without chip part numbers, the pictures say little…
If the chip is a microprocessor, you likely will not be able to change the timeout without the source code and a programmer.
If it'll help, i could name every chip part number I can with the pcb location.
 

Thread Starter

[CC]

Joined Jun 16, 2023
5
" i have a model kit..."

what does it do? if you only want LEDs lit, use flashlight.
The first mode lights only 2 LEDs locsted in the head green, the second mode lights every led red with only one LED green, then the 3rd mode lights everything green, and the 4th mode cycles between mode 2 and 3. Not sure if this means anything but there is like a starting up animation where the 1 green LED representing the eyes lights up first, followed by every other LED.
 

Thread Starter

[CC]

Joined Jun 16, 2023
5
If it'll help, i could name every chip part number I can with the pcb location.
Here all the part numbers i could find
SD1 - SS310
L1 - 100
R1 - 101
R3 - 85D
R2 - 200
R4 - IBC
U1 - BP1808A
K3E80VX
H119X
D1 - M7
R16 - 102
D2 - A7
C1 - 101
U2 - NY8A054AS16
P9274BF
R9 - 101
R10 - 101
R11 - 101
R6 - 300
R5 - 010
Q5 - 4NK16
Q6 - 4NK16
Q1Q3 - NIKOS
P5506NV
GUBSW0702
R7 - 010
R8 - 300
Q2Q4 - NIKOS
P5506NV
GUBSW0702
R12 - 101
R13 - 101
R14 - 101
R15 - 103
 

MisterBill2

Joined Jan 23, 2018
17,754
The question remains as to exactly what the function you are hoping for actually does. If there is a start button then there is a sort of simple scheme to restart it after every time out. If it is an on/off switch it gets more complicated.
The solution will be to have a timer interrupt the power just long enough to reset the inner timer of the micro. That can be a 555 timer set to operate a normally closed relay every 4 1/2 minutes, or so. but the operate time will be only log enough to reset that 5 minute switch-off timer. A cheating trick, but quite effective.
 
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