PCB Re-Review - Githubissues

mgood13 / mgood13_Design_Skills_Project

Repository for the First Semester Design Project

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PCB Re-Review #10

Open mgood13 opened 5 years ago

mgood13 commented 5 years ago

I've changed a few things about my PCB and I think that it's ready or hopefully close to ready to print, but wanted another set of eyes to look at it.

mlp6 commented 5 years ago

A few comments:

The battery is directly connected to the board... header pins instead?
Nitpick... in the schematic, keep the connections at right angles to each other when possible. Just makes it easier to quickly scan since that is what most folks will be expecting.
Not a nitppick... make sure that traces, in general run in a grid, with 90 deg junctions replaced with 45 deg "miters".
Ratwire to T2 not made into trace.
What is going on with the base connect for T1?
Is there a GND / V+ connection for the 4026N?
Schematic components missing values.
Do you actually want 9 V going to the CLK pin?
LED1 not connected correctly on PCB.

mlp6 commented 5 years ago

Actually, I think that more than the mentioned above connections might not be made on the PCB... take a closer look.

mgood13 commented 5 years ago

I'm very sorry. I hadn't pushed up the correct schematics. I have pushed the correct ones up now: "Analog_Light_Project_Improved_Schematic"

mlp6 commented 5 years ago

Some of the issues still persist in this revised version. For example:

A few traces are < 20 mil; need at least 20 mil for the photoetch.
LED1 GND pin doesn't appear to be connected on the PCB.
If you only have a few traces on the bottom, we can probably get more creative and make this a single-sided board. You may be able to use a thru-hole component as a bridge to jump over some traces, etc.
In the schematic, keep the connection between T1 and R15 more visible by not crossing through T1.

mgood13 commented 5 years ago

I think all the traces are 20mil now and I switched everything to a single side by adding in some thru hole components and tracing under those, is this what you meant? Also, I have the LED grounded on the schematic, and it is labelled as ground on PCB, do I still need to route it back to the ground lead on the battery in order for it to be really connected to ground?

mlp6 commented 5 years ago

Hmmm... maybe I opened the wrong PCB file... let me check again.

mgood13 commented 5 years ago

Actually you're right. I didn't make the trace from the negative lead of the battery 20mil. I'll fix that now.