This is the 2nd time one of these little pieces of shit (WingShing 78L05) has failed within normal range of working parameters. Absolute maximum input voltage is 30V, I was feeding it with a clean 24V and was rewarded with instant smoke and the inevitable olfactory pleasure that comes with it. It still stinks after opening all windows for 10 minutes.
Yet again I’ve lost one ATtiny13A micro-controller because of these shitty devices. Fortuitously I had ONE spare micro and one spare 78L05 (genuine ST). I was also lucky that the dying voltage regulator didn’t kill more than just the micro. At the time of failure a couple of other more costly boards were connected. They survived.
The remaining 100 or so of these WS7805 went into the recycling bin. No more ebay experiments with this brand.