Using the Padauk programmer to program the 8 pin SO PMS154C micro and flash a LED on a breadboard.
Forum HERE
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The TOP 5 Jellybean 7440 and 4000 series logic chips. Forum: https://www.eevblog.com/forum/blog/eevblog-1611-top-5-jellybean-7400-4000-logic/ Schmitt Trigger video: …