C02 detector system
Our CO₂ detector system worked properly on a breadboard, but after transferring everything to a soldered PCB/perfboard, it suddenly stopped working. We’re confused because we followed the same schematic and used the exact same components.
We even asked someone experienced with soldering to help us in case the issue was caused by poor soldering, but the problem still remained.
We’re using an MQ135 with LM358 and LM3914. The LEDs either stay stuck or don’t react properly to alcohol, breath, or smoke after soldering.
Has anyone experienced something similar when moving from breadboard to soldered circuit? What possible issues should we check?
these are the schematics that we used:
u/ChuckPLAYZ91 — 4 days ago