background preloader

The cheapest dual trace scope in the galaxy

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. Related:  DIYinstru

Led display digital Voltmeter - circuit diagrams, schematics, electronic projects front side Copyright of this circuit belongs to smart kit electronics. In this page we will use this circuit to discuss for improvements and we will introduce some changes based on original schematic. General Description This is an easy to build, but nevertheless very accurate and useful digital voltmeter. Technical Specifications - Characteristics Supply Voltage: ............. +/- 5 V (Symmetrical) Power requirements: ..... 200 mA (maximum) Measuring range: .......... +/- 0-1,999 VDC in four ranges Accuracy: ....................... 0.1 % FEATURES - Small size - Easy construction - Low cost. - Simple adjustment. - Easy to read from a distance. - Few external components. How it Works In order to understand the principle of operation of the circuit it is necessary to explain how the ADC IC works. Schematic (fixed 22-2-04) 7-segment display pinout MAN6960 An Analogue to Digital Converter, (ADC from now on) is better known as a dual slope converter or integrating converter. back side

Arduino test: voltmeter First experiment with Arduino. Trying to implement a voltmeter. Each analog input of Arduino has 1024 steps. From 0 to 5 volt. This experiment used a simple voltage divider to measure roughly 0 to 12 volt (using 50k as R1 and 4k3 as R2). By varying the values of R1 and R2, the precision and range of the measurement can be changed. Here is the Arduino code: Arduino power meter - Electrical Engineering - Stack Exchange

Current and Voltage meter FIRSTLY A WARNING. Any system with 200V at 30A is unquestionably LETHAL. I once got to observe what 220VAC @ (probably) 50-100A could do; I was getting gas one morning at a local Circle K, and next door a "technician" was working on an HVAC unit on top of a burger joint. Well, he didn't follow proper lockout/tagout procedures (or hell, just remove the main fuses or drop the breaker, or - any number of things that you would think someone with "experience" would know to do), and somehow created a short. Very loud buzzing whoosh noise that lasted a couple of seconds with all I can describe as an "electrical jet flame" (corona discharge?) She's a beast, but one that will treat you ok as long as you respect and understand her. /don't ask me where that came from...

Related: