Op-amp LED flasher - oscillator circuit using LM324
Amazon.com: Major Brands LM324N General Purpose Quad OP Amplifier, -16-32 Volt, 14-Pin, Plastic Dip Tube, 4.57 mm H x 6.35 mm W x 19.3 mm L (Pack of 20) : Industrial & Scientific
Make auto ON OFF Led light sensor using LM324 ic - YouTube
How to test IC LM324 fast. Checking IC LM324 live or die - YouTube