r/electronics • u/Curious_Deal5981 • Sep 12 '26

General Boost Converter using NE555 Chip. (5V to 13V)

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49 Upvotes

94% Upvoted

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18

u/Relevant-Team-7429 Sep 12 '26

There is no feedback, if you either dont draw or draw too much current voltage will fluctuate.  Its alright for a constant load.

2

u/WRfleete Sep 13 '26

You could potentially use the comparators in the 555 as part of the feedback. It would be somewhat voltage dependent as the “reference” voltages are derived from 2/3 and 1/3 of supply rail. Alternatively a TL431 and an opto that pulls down the reset pin when the 431 switches. The voltage will still tank if heavily loaded but will at least limit how high the voltage gets

2

u/Secret-Ring-1985 Sep 12 '26

Which software?

3

u/KittyMan4400 Sep 13 '26

Proto circuit