在本篇文章中，我们研究了如何使用拍摄开关电路和MIC放大器进行简单的拍摄玩具车电路，以响应于用户的电断来控制其前向和反向运动。Zeeshan先生要求这个想法。
每次生成拍摄声音时，该拍摄的玩具车都将在正向或反向方向上移动。
Circuit Objectives and Requirements
- 我迫切需要一个电路图。我需要一个玩具车的电路，在拍手的声音上前进并反转。
- After switching on, car goes forward ( motor rotate clockwise).
- After a clap sound car goes reverse( motor rotate anti clock wise). and vise versa.
- 换句话说，玩具电机改变它从顺时针到反顺时针旋转，并通过拍摄声音对抗而变化。如果可能的话，使用3或更少的铅笔AAA细胞。
- If yes please help me by providing me so.
The Design
可以使用以下简单电路实现上述拍摄操作玩具车电路的想法：
The circuit is made up three basic stages: theMIC amplifier阶段，opamp比较器阶段和一个IC 4017 based flip flop stage.
TheIC 741 is configured as a comparatorand together with the IC 4017 it forms a basic拍摄操作开关电路。
BC557 / BC547构成MIC放大器电路，我们在此处使用了两个晶体管，使设计对拍摄声音高度敏感。
每当麦克风检测到拍摄声音或任何类似的声音时，它立即进行并导致其引线的低信号使得BC557触发。
BC557 triggering forces the BC547 to conduct even harder and in the course brings the pin#2 of IC 741 to ground level or lower than the pin#3 reference pin of the IC. This action enables the opamp output to go high causing a positive trigger for the 4017 input pin#14.
The above functioning forces the IC 4017 to change states across its output pins #2 and pin#3 alternately with every clap sound detection.
The output from the IC 4017 can be seen connected with a relay driver stage consisting of a DPDT relay with its dual contacts configured with the toy car motors, and the supply rails.
来自IC 4017的触发器动作输出在其N / C和N / O点上切换继电器触点，从而使车辆相应地以响应于随后的拍摄声音而相应地旋转Cock-Wise和逆时针方向，因此汽车能够相应地向前或向后移动。
In order to make this clap operated toy circuit make sure to wire the indicated relay contacts across both the motors of the car which may be attached at the front of the rear sides of the unit, and must have a gear box configured with the wheels.
赃物atam – I'm looking for a timer circuit. The type that is used in electronic candles (and christmas decorations) to turn them on 4-5 hours and then off 20-19 hours. Then repeat that on/off cycle everyday. Those electronic candle circuits are small, about the size of a US dime, and can handle 3 to 6VDC. Am not asking you to design one – if you have a similar one in your list…just point me towards it. Love your web site !!
thanks dean, I think you can try the following concept, you can use SMD parts to make it really compact:
//www.addme-blog.com/2012/04/how-to-make-simple-programmable-timer.html
4017 is wrong! it should e a 4013 type flip/flop
先生，我想把一个家庭自动化系统作为我的去年项目，请推荐我一个，你的网站是骗子
谢谢你tapan,目前我没有full-fledged home automation circuit, possibly I'll try to present one soon,
Sir , in place of BC 557 transistor can we use BC547
& What’s main difference bw them
Shiva, you can try it, make sure to connect the emitter towards the base of the other BC547
Sir. I m going to make this circuit but I have some confession to take this circuit diagram. I can’t be understanding Relay connections. How many and which types relays r being used here. Relay code ?
Virendra, the relay is a DPDT relay which stands for double pole double throw, and has two sets of identical contacts which operate together.