24-05-2015, 05:07 PM
Hello David you have been at it again making those smart boxes, well done. I use a little board bought from RS for use with 555 timers, for my PWM motor controllers they used to be about 50p each bought in a pack of 5. I remember how expensive they used to be and 741. I had a 741 in daily use for more than 28 years, we made ourselves a Solar hot water system and a 741 controlled the system, never failed. Then we sold the lot and now have PV panels on the roof .Ted
