| Electronics > Projects, Designs, and Technical Stuff |
| Modern day 723 and 78xx for new design |
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| schmitt trigger:
--- Quote from: imo on January 25, 2019, 07:46:47 pm ---This is a 723 switcher from a car charger (cigarette lighter adapter 14V->5V). --- End quote --- WOW. A Harris semiconductor CA723. Nice vintage find. Of course, a metal can uA723 would be an even better vintage part. |
| Wolfgang:
The oldest ones I have are Harris military chips in CERDIP from 1986. Photo here: https://electronicprojectsforfun.wordpress.com/2018/09/18/not-all-lm723s-are-born-equal/ |
| Hiemal:
I got one! http://ww1.microchip.com/downloads/en/DeviceDoc/mic5156.pdf These are quite pricey, but they have the advantage of being able to use N-channel mosfets. The 5158 version even has a built in charge pump to ensure proper gate drive, something that I feel is pretty unique. |
| coromonadalix:
Here is a very nice and well done project by velleman The K7200 kit 0-30v 0-10 amps power supply The 723 can make good psu's, it's still in production https://www.velleman.eu/downloads/0/manual_k7200.pdf |
| tkamiya:
I think I'm going to use LM317. Load regulation 0.05% and ripple is 0.5%. That's about 1.n mV at 24V. Not bad for simple circuit. 7824 on the other hand is order of magnitude worse. |
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