This is a means of testing AC mains operated circuits at variable AC voltages, and it also provides isolation to allow safe measurements of that circuit. A fused isolation transformer and a variable auto transformer connected together in a grounded, fire safe box. What more could you ask? Find updates at www.projects.cappels.org Introduction […]
An Isolated Adjustable Auto transformer using microcontroller Read More »
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 »
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 »
Download Assembler source code I was looking for an LCD display that I could use to display waveforms on the workbench. The selection criteria for the display module itself was straight forward: 1. Dot graphic with sufficient resolution to display a simple waveform, 2. Available for fast delivery, 3. Have sufficient documentation available online to
G1216B1N000 dot graphics display using AT90S2313 microcontroller Read More »
Description This is the fully featured, jammed packed temperature readout unit. I can measure temperature from up at 8 DS1820 digital temperature sensors all on the same 1-wire bus. That’s right only 3 wires are needed to go to all the temperature sensors, GND, VCC and 1-wire data. All sensors will connect to the same
8 channel LCD Teperature meter using microcontroller Read More »
MEMS (Micro-Electro-Mechanical Systems) Accelerometers are in widespread use as tilt-sensors in mobile phones and cameras. Simple accelerometers are available both as ic-chip’s and cheap development pcb-boards. Wireless chips are also affordable and available in assembled circuits, with matched antenna-network and decoupling-caps onboard. Hook both wireless board and accelerometer up to a microcontroller via serial interface
Wireless Accelerometer Controlled rgb-LED’s using atmega168 microcontroller Read More »
This is a simple color sensor using Atmega16 MCU and can sense Red ,Green and Blue color. How it works: the sensor consist from LDR sensor and RGB LED ,so when the object putted on the sensor the light that emitting from RGB LED will reflected from the object to LDR sensor and read it by ADC of ATMEGA16 as
Color Sensor using Atmega16 microcontroller Read More »
After Christmas I was in the situation that my nephew’s birthday celebration came near. I asked him if he had a special on his wish list and he told me that he doesn’t have a wish at all, for the moment. He still had not played with every toy he got for christmas. We decided
Ambient Light Gift Badge using ATTiny13 microcontroller Read More »
There are numerous posts on Instructables about how to make a flickering LED candle. This is my version. The project requires the following components: 1. Tiny45 AVR Microcontroller (Tiny13 would also do) 2. 1W Warm white (or yellow) LED 3. Perspex tube 4. AA or AAA size batteries- 4 (alkaline or NiMH) 5. PCB stock
YAFLC (Yet Another Flickering LED Candle) using Tiny45 microcontroller Read More »
