00:00Mix 3.3 V parts with 5 V parts, fry boards fast
00:03Need logic level shifters
00:07Tested options, found best deals for top 5 bi-directional logic level shifters
00:11Keep hardware safe, keep signals clean
00:15First board, 4-channel IIC-I2C converter module
00:19Shifts between 3.3 V and 5 V both directions for UART, SPI, I2C buses
00:26Cost, $50
00:284,700 sold, 5-star rating
00:31Worth buy for quick, reliable breadboard prototypes
00:35Second board, 2-channel shifter module
00:40Standout feature, reverse polarity protection
00:42Wire backwards by mistake, board survives without burning
00:47Cost, $1.04
00:49Near 5,000 sold, 5-star rating
00:53Worth buy for single serial UART lines where mistakes happen
00:57Third pick, 10-pack 4-way transformation modules
01:01Gives 10 separate boards, 40 total level-shifted channels
01:05Cost, $4.38
01:09Perfect 5-star score
01:11Worth buy for high-volume stocking in parts drawer at pennies per board
01:16Fourth pick, budget 10-pack 4-way transformation boards
01:20Reliable bi-direction level shifting across 4 channels per board
01:24Cost, $3.82
01:28Rated 4.9 stars with thousands sold
01:31Worth buy when maximizing channel count on strict project budget
01:35Fifth pick, TXS-0108E8 channel module
01:40Best feature, high-speed bi-directional switching with 8 lines on one board
01:45Build for Raspberry Pi GPIO, high-speed SPI, fast SD cards
01:50Cost, $3.43
01:535-star rating
01:55Worth buy when sensors need more than 4 synchronized pins
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02:06Build circuits safe
