This is a low frequency amplifier with an adjustable transimpedance that is intended to be used to take relative measurements of a wide range of photo currents. Not having many parts, this amplifier can be put together in a short amount of time. Find updates at www.projects.cappels.org Introduction I needed to make some relative optical […]
Photocell Amplifier using microcontroller Read More »
Measure current vs voltage or voltage vs current over limited range with good accuracy. This was built on a phenolic board which was mounted on a plastic box. The box serves two purposes: It holds the circuit off the workbench, and it makes a nice, stable mount for the potentiometer. Find updates at www.projects.cappels.org I
A SIMPLE MANUAL CURVE TRACER using microcontroller Read More »
Calculates and displays L and C from oscillation frequency using reference components. No relays, no range switching, a minimum of controls. And it is pretty accurate too! Note: After reading this article, check out the improved, modified An Even Better LC Meter… The 2 line x 16 character LCD shows the calculated inductance and the
A Pretty Good LC Meter Based on the AVR using ATTINY2313 Microcontroller Read More »
An improvement over “A Pretty Good LC Meter.” Enhanced capacitance self calibration, accurate operation without precision components, and only one micro controller. Downloads Download or view the WINAVR main source file: lcm.c Download the complete package including the LCD library: Even-Better_LCM.zip (LCD Library provided with Peter Flurey’s permission) Download Gerd Sinning’s: LCcalc tools for Windows
An Even Better LC Meter Based on the AVR ATTINY861 Read More »
Shield for Arduino designed and based on the module GSM/GPRS SIM900 or the GSM/GPRS & GPS module SIM908, to make calls, voice and data connections via GPRS allow maximum customization and provide many configurations. With a microphone and a headset with a 3.5 mm jack (just the standard headphones for computers), you can make a voice call from
GSM GPS module shield for Arduino Read More »
Is it possible to use DRAM with microcontroller AVR? Yes, it is possible. Jesperh has proved it. He hooked up a DRAM to a small processor (in this case an Microcontroller Atmel 8515), and handle the RAS/CAS sequencing and refresh in software. The type of DRAM is Hitatchi M5M44800, a 512k*8 DRAM!. Bigger than the
Interfacing DRAM Memory using AVR microcontroller Read More »
Comments: All resistors are 1/4W.The circuit is powered by 9…15V DC or AC. When In Circuit Programming (ISP) connectors are used, is possible the programmer to be powered from targets power source. Diodes D2 and D6 protect the regulator LM7805, when targets power is used. ‘ XTAL JUMP ‘ is used to cut XTAL when
Ponyprog Circuit for AVR & PIC16F84 using microcontroller Read More »
The ATMEL AVR programmer works with the Windows program “Ponyprog” which works under 95, 98, XP. On board the AVRs that can be programmed are those in the schematic. For other members of AVR family or the rest programmable ICs that Ponyprog can program, there is the J1 connector (CON10) which allows expanding the programmer’s
Ponyprog Circuit for ATMEL’S AVR using microcontroller Read More »
Devices The EEprom programmer software supports the following devices. 28C16 28C256 28C17 29C256 28C64. Hardware Diode D1 and resistor R1 provide the VDD isolation when programming the 24 pin devices. The jumper J3 must be shorted for 24 pin devices, and open circuit for 28 pin device programming. For more detail: EPROM adapter for ATMEL
EPROM adapter for ATMEL 89 Series Flash Microcontroller Programmer Read More »
Tired of spending hours and hours in wire soldering? Do your circuits look ugly and you are looking for a way to produce professional-like PCBs? Then you had better try photoetching. And the first step to do that is to have the right equipment that is an Automated Exposure Box. Moreover if you like tinkering
PCB Exposure Box with Countdown timer using ATMEGA8 microcontroller Read More »
