China's sensor network released the first batch of 6 standard drafts

Recently, the National Sensor Network Standards Working Group formally released the first batch of 6 standard exposure drafts for sensor networks completed in China. In the past two years, the working group has held eight plenary meetings and completed six dra

Light bar / module constant current scheme LC1912

The LC1912 is an ultra-low operating voltage LED constant current driver designed specifically for multi-string LEDs with low input voltages. Its constant current accuracy is 2%, the temperature stability is very good, and the current accuracy is much higher than 5-10% of the general LED co

Ward pager principle and circuit diagram

With the development and application of wireless technology, the ward pager system can receive call information in instant messaging and mobile. Some pagers have been developed and manufactured on the basis of FM wireless technology. It combines the system devel

OTL headphone amplifier circuit

As shown in the figure, a double triode ECC82 (equivalent to E802C, E82CC, and North American 12AU7, domestic 6N10 type) is used as an amplifier. This type of pipe l has the characteristics of excellent index and long service life. The preamplifier generates enough signal amplitude to dri