Description: Power supply: DC 4.5-5V.  Board size: 3.5 * 5.5cm.  Low-level judgment voltage: 0.0-0.4V.  High-level judgment voltage: 3.3-5V.  Package included: 30 x DIY Digital Display LED Logic Pen Electronic Kit

Description: Power parameters: DC5V (DC power supply).  Driver chip: LM3914, LM358.  Input mode: microphone sound control, 3.5mm audio source cable.  Board size: main board 90*30mm, secondary board 240*30mm.  Finished product weight: 60g.  This kit is a split-type voice-controlled, wire-controlled music level indicator, which is input through microphone induction or earphone socket. The LED light fluctuates to both sides with the middle of the music volume. It is very dynamic, especially when used at night.   Package Included:  1 x 38-Segment Sound Control Music Level Indicator DIY Kit

Working Principle:  This is a mini ultrasonic levitation device that can suspend foam balls. The device consists of a single chip microcomputer, a driver chip and two ultrasonic probes.  Mainly...

Parameter:   Supply voltage: DC4.5-6V.  Dimensions: 45*60mm.  Package included:  3 x DIY 30-60 Seconds Watch Timer Kit

Feature:  Product name: Gas detection alarm circuit;  Supply voltage: DC5V;  Appearance size: 60*30mm;  Sensor: MQ-5;     NOTE:  This kit requires self-assembly.     Package includes:  1 x DIY Kit.    Principle: ...

Description:   Circuit board is made of FR - 4 glass fiber, tough and durable plate.  Reasonable circuit layout design.  Use your creativity, diy your LED clock!  Voltage: 5V-12V.  PCB...

Feature: AM SW radios receiver kit, using CXA1691BM integration, with fewer external components, high sensitivity, low power consumption, etc.  AM frequency range 525-1605KHZ.  SW frequency range 87-108MHZ.  Power: 2 x...

Feature:  Output voltage: 1.25-12V;  Output current: 200mA;  Input voltage: AC110 or AC220V;  Transformer power: 2.5W;  Power cable length: 1 meter;  Output cable length: 20cm;  Size: 11.2x6.9x4cm;  Cover material: plastic;  PCB...