Verified pinouts · Power budgets · Bench procedures
Hardware answers you can put a multimeter on
Reference pinouts, power budgeting and troubleshooting procedures, with the measurement that confirms each one.
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Solar inverter fault finder
Grid, isolation, battery and arc faults by symptom: likely causes, safe checks, and when to call an installer.
Open →Solar panel output
Daily and yearly energy from a solar array, and how many panels cover a daily need.
Open →Appliance energy cost
What an appliance costs to run per day, month and year, including standby draw.
Open →Battery runtime
How long a battery bank, UPS or power station runs a load, allowing for depth of discharge and inverter losses.
Open →Power bank real capacity
Why a 20,000 mAh power bank does not deliver 20,000 mAh, and how many charges you can really expect.
Open →PSU & thermal calculator
Size a PSU with headroom from a parts list, and get heat output in BTU/hr, enclosure airflow and yearly energy cost.
Open →Open
Every calculator
All of them run in your browser — nothing is uploaded and nothing is stored.
Pinout lookup
RS-232, Raspberry Pi GPIO, ARM SWD/JTAG, ATX, RJ45 and USB, drawn as the connector looks, with levels and a multimeter check.
Open →PSU & thermal calculator
Size a PSU with headroom from a parts list, and get heat output in BTU/hr, enclosure airflow and yearly energy cost.
Open →Power bank real capacity
Why a 20,000 mAh power bank does not deliver 20,000 mAh, and how many charges you can really expect.
Open →Battery runtime
How long a battery bank, UPS or power station runs a load, allowing for depth of discharge and inverter losses.
Open →Appliance energy cost
What an appliance costs to run per day, month and year, including standby draw.
Open →Solar panel output
Daily and yearly energy from a solar array, and how many panels cover a daily need.
Open →Solar inverter fault finder
Grid, isolation, battery and arc faults by symptom: likely causes, safe checks, and when to call an installer.
Open →Questions