Adafruit-Fruit-Jam-PCB (adafruit)ECADConfidence: Medium

The 3.6 V zener protecting A0 draws about 349 uA and caps the ADC around 3210 of 4095, while lifting one leg of the zener gives full scale.

Impact Analysis

Persona

Electrical Engineer

Team Size Impact

5x Multiplier

Prototype Delay

3 Days

Est. Annual Cost

$30,000

1 user · 1 month240 min
Rest of team960 min
Rest of year13,200 min

monthly_minutes × 12 × team_multiplier ÷ 60 × $75/hr = $30k/yr

$75/hr assumed rate.

Annual team-minutes decomposed from the reported monthly inputs.

Evidence & Sources

1 Sources

adafruit/Adafruit-Fruit-Jam-PCB Issue #1: Fruit Jam A0: Protection diode D2 appears to load 3.3 V analog input

github.com

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Analyst Notes

From the Grok pain-radar digests, Oct 27-28 2026 (Oct 27 8:41 AM ET through Oct 28 7:41 AM ET digests plus the Haitch editions). Verified live 2026-10-28: issue/PR/thread read; title and state confirmed.