LM7805 Guide: Pinout, Heat Limits and Buck Alternatives
Work out whether a 7805 can power your board: check its pins, input headroom, realistic heat budget and the changes required for a buck replacement.
Read article24 Products
From the desk
Market signals, technical notes, and practical sourcing guidance for semiconductor procurement.
Work out whether a 7805 can power your board: check its pins, input headroom, realistic heat budget and the changes required for a buck replacement.
Read article
A receiving routine that holds up in an audit: ISO 2859-1 sampling, AQL by part class, cheap-to-expensive test order, and records someone else can reproduce.
Read article
At 480 Mb/s a bit is 2.08 ns. 90 ohm impedance, 50 mil skew, and a continuous return path decide whether the link keeps high speed...
Read article
Choose LM317 resistor values, identify the output-connected tab, check minimum load and calculate a realistic heat budget before approving a replacement.
Read article
An oscillator that starts on the bench and fails cold has a margin problem. Load capacitor math, the negative-resistance test, and the probe that stops the...
Read article
Most I2C failures are rise time and capacitance, not protocol. The 30-70% measurement, the pull-up window, and the probe that changes the answer.
Read article
The LM317 needs 3 V of headroom and a heatsink sized by one equation. Worked numbers for 12 V to 5 V, the 5 V to...
Read article
Most counterfeit parts are not clever fakes: they are re-dated, re-marked or re-reeled stock. Five checks a buyer can run before accepting, with the tests that...
Read article