19 pieces of white LEDs lamp (220v 1w) LEDs used directly without transformer 220nF 220v mains AC voltage of 400 volts (non-polar) and 4.7mf resistor capacitor 100uF 63 volt capacitor with the overthrown 1n4007 diodes are operated with the filtered and rectified by
Transformerless 220V LED Lamp Schematic
CAUTION 220v LED lighting has been working with high voltage circuit capacitor connection Observe caution + – If you connect the high voltage polarity may be large explosions before running the insured Power Line circuit, protective goggles
1W 220V Led Lamp Long Life
source 51dz.com
Published: 2009/02/02 Tags: led projects, power electronic projects, simple circuit projects
LCD Date Time Temperature AT89C52 DS18B20 DS1302
Atmel microcontrollers with a good example for the use of DS18B20 DS1302 circuit 2 × 16 LCD display with 4 buttons in circuit adjustments can be made
The first button is a long hold in seconds (h) setting switches to the second and third button with the settings is done after the first operation are repeating minutes goes like this continue operations after the last button and holding the set is being stored Retrieving AT89C52 system 12MHz frequency works
AT89C52 Temperature meter project