Posts Tagged ‘mechanics’

www.educationaltoysclub.com This is educational toys for student to learn the electronic basic and it can let the student to use their hands to practise soldering. This is a useful electronic kits I showing to you.

www.educationaltoysclub.com Brown, red, orange, yellow, green, blue and purple, flashing seven colors can improve students interests in study of electronics technology and help them comprehend the fast development in the science field. #This circuit uses one NPN transistor, two PNP transistors, resistors and capacitors to form a three phases multivibrator. When the circuit is operating, NPN transistor is off while PNP transistors are on and. R1, R3, R5 and C1, C2, C3 determine speed of cycling. This circuit uses three colors LED. When G or R conducts, LED shows green or red color. When G and R conduct at the same time, LED shows orange color. Therefore, LED lights up as a sequence that is red, green, orange. This circuit operates at 6V. It requires four 1.5V batteries.

Funny light control stretch spot moving experiment is specially designed for extra-curriculum. It can be applied to all kinds of ornaments and just needs a little bit alteration. #This circuit uses time base circuit NE555 and decade counter IC MC14017 and 18 Light Emitting Diodes. When LED1~LED18 are working, it will be flashing from middle to two Sides. This circuit needs 9V to operate. It requires one 9V battery.

This circuit uses relay with a buzzer. The intermittent current beats speaker through electrolytic capacitor C. If you finish this circuit and check it right, turn power on, and then you will hear the sound from speaker. Fix the switch on the gate and this is an easy doorbell. The circuit works at 6V. It requires four 1.5V batteries.

The circuit is a Light Sensitive Alarm composing of MCI4011, Phototube and other components. It is used to protect your eyes. When the light is dim, we will hear the sound from the speaker. The core of this circuit is IC MC14011. MC14011 is a control circuit that composes four NAND gates. R2, C and Gate 1 of MC14011 form a multivibrator; Gate 2, Gate 3 and Gate 4 form a control circuit. Phototube conducts when there is light. The speaker sounds while phototube is conducting. This circuit operates at 6V. It requires four 1.5V.