The cheapest dual trace scope in the galaxy
This submini USB scope is based on a Atmel Tiny45 cpu and cost less than 5€ with a homemade pcb It has 2 analog inputs and can supply 5V ont the 4 pins header on the right. One of the inputs can be scaled down with the trim pot. The firmware in the Tiny45 is written in C and compiled with Winavr and usb source code from obdev. As you can see, there is no crystal , the software sync the internal 16.5Mhz pll clock with the USB clock. The cost with a home made pcb is around 5€.Of course, do not expect 1Gs/s HID does not alow that data rate ! It has been designed to plug into a project breadboard so there is no need for a power supply.On this picture it is used to test a high precision light sensor. It does connect to a PC with usb in HID mode, without the need to install any specific driver. Here is the schematic, so simple ! Thank you to[Milka2009] who made a nice video Bill of material eagle files: usbscope-tiny.zip And last for today, the Windows display software UsbADC.zip.