Something wrong with PCB (Solved!)

Thread Starter

HazenAL

Joined Sep 1, 2020
13
Hello, Im new to EE.
Recently, I designed a LED driver and dimmer circuit and ordered the PCB. Im using a TLC555 for PWM and a LM3405 as the driver. I have soldered on everything and double checked continuity and everything seems to be fine. But when I run 5V through with a powerbank and put a multimeter in current mode on the other end where the LED is supposed to be, I don't get any readings. I haven't received the LED yet which is why I used a multimeter to complete the circuit. I think there are 2 possible sources of error: Either I fried a component while soldering, which is unlikely because I made 2 boards. The other reason is that there is something fundamentally wrong with my circuit design.
 

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Thread Starter

HazenAL

Joined Sep 1, 2020
13
What had happened is that my multimeter cannot read the PWM'ed current so it registered as 0. I tried it with a simple DC motor and all was well! Moral of the story: get some rest you can think clearer!
 
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