Need Help to ID a PCB

TOMinSATX

New member
Greetings to all and I'd appreciate anyone's help in identifying the circuit/pcb that I found in a collection of RC parts that was donated to our club. It is barely visible in this shot, but the IC is a 555, and the 7 connectors are labeled CN1-CN7 with CN7 having G and +5 labels. My own guess is a timing circuit for lights, but I wasn't able to find a visual match after a few hours looking online. I'm hoping that someone can ID it so I can find a connection diagram.
PCB Unk 1.jpg


I just got back into RC flying this last year after a 50 year gap due to life getting in the way of fun. The technology from my last plane which was a KAOS (60" I believe) with an ST-46, Flaps, retracts, using a Kraft Single-Stick 72Mhz. I finished building that plane after my first son was born, and after crashing it and having only three stripes in the AF in 1973 meant any and all funds were earmarked for the family. I'm now flying an AeroScout and building two other planes while I learn a whole barn-full of new tech. One of the planes is a powered glider kit from 1982 that was hiding in the closet, and the other is a scratch build modernized D17 Staggerwing with a molded fiberglass fuselage and foam board wings.
 

AIRFORGE

Make It Fly!
Moderator
Not completely sure, but it looks like a basic LED control module. The potentiometer would probably adjust the strobe frequency of some of the plugs/LEDs. @LitterBug have any ideas?
 

LitterBug

Techno Nut
Moderator
Not completely sure, but it looks like a basic LED control module. The potentiometer would probably adjust the strobe frequency of some of the plugs/LEDs. @LitterBug have any ideas?
yeah, I have nothing else and that would be my best guess as well. If we had a picture of the backside of the PCB, we could plausibly trace the traces and figure more out....
 

Flying Monkey fab

Elite member
I spent 40+ years in electronics and design intent can be rough without knowing where it goes. I can do better telling you what it is not. It is not for anything servo related as all the outputs are two pin.
If I had it in hand we could get farther as we could apply power and see what the outputs are. My SWAGS are LED control (not original I know) or timing for something. The 555 is basicly a clock but how it is being utilized is the stumper.
 

Piotrsko

Legendary member
This isn't HACK-A-Day, so the 555 is timing. @Flying Monkey fab got it, light controller/driver. Could be sequential, but suspect it is either left right or 12345, not controllable other than power on/off.