Description:  Functional characteristics: stc single-chip computer +8025+ voice playback.  1. Simultaneously display the current date, week, time and temperature for easy viewing.  2. Large-size digital tube display (date, week 0.8...

Description: AT89C2051-based of four electronic clock kit.  Supply voltage: 3V  ~ 6V.  PCB Size: 52 x 42mm.  Function: Seconds correction (for precise School).  Switch to every minute independent display interface...

Description:   Working voltage: DC 5V.  Work effect: speed can be adjusted.  Size: 40 x 50mm.    Note: it is not soldering finished product, it is diy kit. Circuit principle:...

Description: ICL8038 is a kind of monolithic function signal generator with excellent performance.  It can generate sine wave, triangle wave, square wave and square wave.  Feature: Operating voltage: DC12V.  Working...

Feature:  16-tone box under your control, arbitrarily issued 16 kinds of interesting analog sound, is not only an electronic toys, also can be used as the doorbell or alarm.  Specification: ...

Description:It is DIY kit, need to assemble it yourself.Color: BluePackage included:5 x DIY LED Round Flash Electronic Production Kit

Working principle: Using the SMD CD4060 control 12 red, yellow and green LED flashing, adjust RP1 can change the speed of flashing, while the music chip issued a wonderful music....

Description:   The suite,adopt a warning lamp circuit NE555 and CD4017 chip simulation to make blue LED and red LED flashing, respectively, according to the pulse adjusting RP1 flicker frequency...