Electronics project notes/JY-MCU notes

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This is for beginners and very much by a beginner. It's meant to try to cover hobbyist needs, and as a starting point to find out which may be the relevant details for you, not for definitive information.

Some basics and reference: Volts, amps, energy, power · Ground · batteries · resistors · changing voltage · transistors · fuses · diodes · varistors · capacitors · inductors · transformers · baluns · amplifier notes · frequency generation · skin effect

And some more applied stuff:

IO: IO and wired communication · localish communication · wireless (ISM RF, GSM, RFID, more) · 802.11 (WiFi) · 802.15 (including zigbee)

Sensors: General sensor notes, voltage and current sensing · Knobs and dials · Pressure sensing · Temperature sensing · humidity sensing · Light sensing · Movement sensing · Capacitive sensing · Touch screen notes

Actuators: General actuator notes, circuit protection · Motors and servos · Solenoids

Some stuff I've messed with: Avrusb500v2 · GPS · Hilo GPRS · Bluetooth serial · JY-MCU · DMX · ESC/POS notes

Audio notes: basic audio hacks · microphones · amps and speakers · device voltage and impedance, audio and otherwise ·

Less sorted: Common terms, useful basics, soldering · Microcontroller and computer platforms · Arduino and AVR notes · ESP series notes · Electronics notes/Phase Locked Loop notes · mounts, chip carriers, packages, connectors · signal reflection · pulse modulation · electricity and humans · Unsorted stuff

See also Category:Electronics.


dx.com sku 104310

(I have a DEMO V1.2, but different versions are probably equivalent)

Mostly consists of:

  • ATmega32/L [1] (which can operate at 3V and 5V, configured at 3V(verify))
  • 3.3V regulator so you can power it from ~5V (662K)
  • 16MHz crystal
  • 17x2 pins exposing Vcc, Gnd, and all 32 pins on ports A,B,C,D
  • ISP header
  • JTAG header
  • 1 power LED
  • 8 LEDs (on port B)
  • 5 buttons
    • one of which is reset
    • the other four are (on which port?)
  • USB mini-B socket
    • Useful for 5V
    • Apparently the controller comes with a bootloader that implements USB HID device, so you can upload
      • press S4 on reset?(verify))
      • Attached to which pins?
      • (I didn't know this and just program without bootloader using ISP)