This is the next iteration of my QRSS Band Edge Marker, my goal is to make it even smaller.
Marker - PCB Art Work
This Home-brew PCB is 1.0 X 0.75 inch; with 15mil traces, 10mil GND Grid, 3pt font, and using 1206 parts.
This is a standard Colpitts Oscillator, with my own modifications for stability.
The black thing in the centre is a L78L05 Voltage Regulator - left of it is a 2N3904 SOT-23. On the bottom row, the third component from the left is a GKY50086 4.5-50pF Trimmer Cap. For this oscillator, the trimmer should have been a smaller value and NPO, but this is only value I have a present.
I normally do not like to cut the leads off of new crystals, but this a dedicated application and this is where it will always be.
I LOVE small parts!
Project on hold, waiting
Soldering Iron Micro Tip Replacement
Soldering Iron Micro Tip Replacement
While working on this project, I changed the tip of my new soldering iron for a larger size to solder the ground wire onto the crystal. Unfortunately, the micro tip (1/64 inch wide) that I removed
Without a spare micro soldering tip - this project is on hold until replacement (557-7566-100) arrives.
Six replacements tips are now on order - never again do I want to be without a spare.
I only had six more solder joints to make on this project!
My other soldering irons do not have small enough tips, as necessary for this task.
BTW: The photo above was taken through a Ring Magnifier Lamp with a older camera, it is less than expected of a real Macro Lens Camera, but it is OK for my purposes.
-
No comments:
Post a Comment