MISCELLANEOUS GOOD STUFF
Frequency (MHz) comm UART A/V RTC Notes and Primary uses 0.032000 Real-time clock, watches; allows binary division to 1 kHz signal (25×1 kHz). 0.032768 215 allows binary division to 1 Hz. Real-time clock, quartz watches and clocks; common low-speed for microcontrollers. Very common. Available as TCXO.[1] 0.038000 Used with FM stereo encoder chip BA1404 and similar. 0.065536 216…
A minimal table to compare the Espressif’s MCU families (ESP8266/ESP32/ESP32-S2/ESP32-S3/ESP32-C3/ESP32-C6).
Resistors are available in a large number of different package styles and sizes. The most commonly used resistors are rectangular surface mount (SMD) resistors, but the older axial resistor is still used extensively in through-hole designs. See the dimensions of SMD, axial, and MELF packages and also some recommended land patterns for SMD components for soldering to PCBs.
Details are shown for a 7 band graphic equalizer but the principle can be extended to almost any number of bands with accurate enough components. Only one gyrator stage is shown: all 7 gyrators are the same circuit, only the capacitors change, as shown in the chart. Three of the seven faders are shown to…