I recently used the Howland constant current source circuit. The amplifier is LMV614. The output currents are 0.5ma, 1ma, 3ma, and 5ma. However, when I finished drawing the board and tested it, I foun...
The forum is so quiet... I'll upload a 4x4 keyboard library for everyone to play with. [b]Connection:[/b] [align=left]Keyboard esp32[/align] [align=left]Row 1 io19 [/align][align=left]Row 2 io18[/alig...
Qorvo provides a comprehensive list of RF project design tools in 'Qorvo Design Tools - The Go-to Resource for RF Projects' . Let's take a look at some of them.Qorvo MatchCalc
This easy-to-use RF/micr...
The communication standard of the radio frequency tag is the basis for the design of the tag chip. At present, the international communication standards related to RFID are mainly: ISO/IEC 18000 stand...
There is a USB detection. When the USB is detected, the red light in RGB will be displayed. When the key is pressed for the first time, it will light up white. There are five gears corresponding to fi...