Description:
The project is 1Hz - 40MHz frequency counter with voltmeter displayed on 8 digit LCD display.
Micro controller:
At90S4433
Features:
Four ranges, with 10 Hz and 1Hz resolution to at least 40 MHz.
High sample rate (5 samples/sec or more) with averaging to remove jitter.
Programmable ± offsets and S-Meter display for receiver or transceiver.
Binary and BCD maths to provide direct […]
Description:
This project is basically decoding a DTMF signal to digital form where an microcontroller detect the signal. The project uses an integrated decoder chip MT8070DE which decodes all 16 DTMF tone pairs in to 4 bit code. AVR Microcontroller reads these codes and outputs them to LCD as characters. DTMF receiver stores last 234 received […]
Description:
This Distance Measuring project interfaces an application module with AVR microcontroller and two SFR04 sonic modules. Measuring principle is very simple. Measure time between sonic transmission and echo reception and then divide it by sound speed in this environment. The distance measured is displayed on LCD screen. This distance meter can measure distances from 3cm […]
Description:
One of SMD soldering techniques is using a reflow soldering oven. Reflow soldering technique is used when it is impossible to solder components by hand. These may include ball grid arrays (BGA), small pitch quad flat packs. Or simply solder any SMD element to make board look professional and smooth.
Soldering oven controller is based on […]
Description:
This an LCD based digital clock which interfaces text-mode LCD (HD44780 and compatible) to show the time in big letters. The letters are drawn with user-defined characters.
Micro Controller:
ATMega16
Hardware:
Text-Mode LCD with at least 4 lines and 15 characters (16*4 module used for prototyping, Displaytech164A)
RTC with timer in async-mode using a 32kHz Watch-Crystal
2 Buttons for clock-setting
For more […]