Electronics > Projects, Designs, and Technical Stuff
Modern day 723 and 78xx for new design
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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