Try an oscilloscope for under $200 - EDN
Low speed AVR oscilloscope
Dso150 Digital Scope Oscilliscope Kits Avr Core With Probe - Oscilloscopes - AliExpress
Oscilloscopes Multimeters Handheld | Portable Usb Digital Oscilloscope - All-sun - Aliexpress
Digilent Analog Discovery 2 USB Oscilloscope and Logic Analyzer : ID 4652 : $374.95 : Adafruit Industries, Unique & fun DIY electronics and kits
/i/31176/products/2017-01-21T06%3A43%3A19.794Z-P1190973_1000.jpg?1606306133 "iCP12 (1mV) - usbStick (6 Ch. USB Oscilloscope) from PICcircuit on Tindie")
iCP12 (1mV) - usbStick (6 Ch. USB Oscilloscope) from PICcircuit on Tindie
Hands-on review: Xprotolab Plain, a $20 breadboard oscilloscope - Electronic Products
USB oscilloscope - General Electronics - Arduino Forum
ATTiny USB Dual Channel Oscilloscope (for Win x86/x64) - YouTube
Oscilloscope using AVR microcontroller - ATMega32 AVR
MRP01 - USB AVR Programmer (for ATmega, ATtiny, AT90 family with ATMEL Studio, Avrdude, Arduino)
PICOSCOPE 4262 Pico Technology, PC USB Oscilloscope, PicoScope 4000, 2 Channel | Farnell Poland
Low Speed AVR Oscilloscope
iCP12 - usbStick (USB DAQ, PC Oscilloscope, Data Logger, Frequency Generator, PIC18F2550 IO Board)
SparkFun O-Clock - AVR Oscilloscope Clock - WIG-09306 - SparkFun Electronics
Pololu USB AVR Programmer
Embedded Engineering : Two-Channel PC Based Oscilloscope USB
Behzad 650KSPS Digital GLCD Oscilloscope v1.0
ATMEGA162 LCD Oscilloscope Circuit – Electronics Projects Circuits
You Don't Need That Bulky CRT Oscilloscope Anymore | Hackaday
Pololu USB AVR Programmer
USB Accessory Oscilloscope:Amazon.com:Appstore for Android
PoScope Mega1 USB Oscilloscope, Function Generator and Logic Analyzer Bundle - RobotShop
SparkFun O-Clock - AVR Oscilloscope Clock - WIG-09306 - SparkFun Electronics
