555 T-Shirt: http://www.zazzle.com.au/classic_555_timer_chip_schematic_circuit_t_shirt-235193027808469926<br />Hacking the Mantis Elite microscope to control the LED brightness with a 555 PWM circuit.<br />Forum Topic: http://www.eevblog.com/forum/blog-specific/eevblog-392-555-led-pwm-hack/<br /><br />EEVblog Main Web Site:<br />http://www.eevblog.com<br />EEVblog Amazon Store:<br />http://astore.amazon.com/eevblogstore-20<br />Donations:<br />http://www.eevblog.com/donations/<br />Projects:<br />http://www.eevblog.com/projects/<br />Electronics Info Wiki:<br />http://www.eevblog.com/wiki/
