舞蹈发光二极管电路--Dancing LEDs
舞蹈发光二极管电路--dancing leds
parts:
r1_____________10k 1/4w resistor r2,r3__________47k 1/4w resistors r4______________1k 1/4w resistor r5,r6,r7______100k 1/4w resistors r8____________820r 1/4w resistor c1,c3_________100nf 63v ceramic or polyester capacitors c2_____________10΅f 50v electrolytic capacitor c4____________330nf 63v polyester capacitor (see notes) c5____________100΅f 25v electrolytic capacitor d1___________1n4148 75v 150ma diode d2-d11_________5 or 3mm. leds (any type and color) ic1___________lm358 low power dual op-amp ic2____________4017 decade counter with 10 decoded outputs ic m1_____________miniature electret microphone sw1____________spst miniature slider switch b1_______________9v pp3 battery clip for pp3 battery
additional circuit parts (see notes):
r9,r10_________10k 1/4w resistors r11____________56r 1/4w resistor d12,d13 etc.____5 or 3mm. leds (any type and color) q1,q2_________bc327 45v 800ma pnp transistors q3____________bc337 45v 800ma npn transistor
device purpose: the basic circuit illuminates up to ten leds in sequence, following the rhythm of music or speech picked-up by a small microphone. the expanded version can drive up to ten strips, formed by up to five leds each, at 9v supply. circuit operation: ic1a amplifies about 100 times the audio signal picked-up by the microphone and drives ic1b acting as peak-voltage detector. its output peaks are synchronous with the peaks of the input signal and clock ic2, a ring decade counter capable of driving up to ten leds in sequence.
an additional circuit allows the driving of up to ten strips, made up by five leds each (max.), at 9v supply. it is formed by a 10ma constant current source (q1 & q2) common to all led strips and by a switching transistor (q3), driving a strip obtained from 2 to 5 series-connected leds. therefore one transistor and its base resistor are required to drive each strip used. notes: the sensitivity of the circuit can be varied changing r4 value.
c4 value can be varied from 220 to 470nf in order to change the circuit speed-response to music peaks.
adopting the additional circuit, only one item for r10, r11, q1 and q2 is required to drive up to ten led strips. on the contrary, one item of r9 and q3 is necessary to drive each strip you decided to use.
each r9 input must be connected to ic2 output pins, in place of the leds d2-d11 shown. r8 must also be omitted.
whishing to use a lower number of leds or led strips, pin #15 of ic2 must be disconnected from ground and connected to the first unused output pin. example:
if you decided to use 5 leds, pin #15 of ic2 must be connected to pin #1; if you decided to use 8 leds, pin #15 of ic2 must be connected to pin #9 etc.
current drawing of the circuit is about 10ma.
whishing to use a wall-plug transformer-supply instead of a 9v battery, you can supply the circuit at 12v, allowing the use of up to 6 leds per strip, or at 15v, allowing the use of up to 7 leds per strip.
采集设备不能通讯怎么办 多通道振弦采集仪数采仪
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舞蹈发光二极管电路--Dancing LEDs
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parts:
r1_____________10k 1/4w resistor r2,r3__________47k 1/4w resistors r4______________1k 1/4w resistor r5,r6,r7______100k 1/4w resistors r8____________820r 1/4w resistor c1,c3_________100nf 63v ceramic or polyester capacitors c2_____________10΅f 50v electrolytic capacitor c4____________330nf 63v polyester capacitor (see notes) c5____________100΅f 25v electrolytic capacitor d1___________1n4148 75v 150ma diode d2-d11_________5 or 3mm. leds (any type and color) ic1___________lm358 low power dual op-amp ic2____________4017 decade counter with 10 decoded outputs ic m1_____________miniature electret microphone sw1____________spst miniature slider switch b1_______________9v pp3 battery clip for pp3 battery
additional circuit parts (see notes):
r9,r10_________10k 1/4w resistors r11____________56r 1/4w resistor d12,d13 etc.____5 or 3mm. leds (any type and color) q1,q2_________bc327 45v 800ma pnp transistors q3____________bc337 45v 800ma npn transistor
device purpose: the basic circuit illuminates up to ten leds in sequence, following the rhythm of music or speech picked-up by a small microphone. the expanded version can drive up to ten strips, formed by up to five leds each, at 9v supply. circuit operation: ic1a amplifies about 100 times the audio signal picked-up by the microphone and drives ic1b acting as peak-voltage detector. its output peaks are synchronous with the peaks of the input signal and clock ic2, a ring decade counter capable of driving up to ten leds in sequence.
an additional circuit allows the driving of up to ten strips, made up by five leds each (max.), at 9v supply. it is formed by a 10ma constant current source (q1 & q2) common to all led strips and by a switching transistor (q3), driving a strip obtained from 2 to 5 series-connected leds. therefore one transistor and its base resistor are required to drive each strip used. notes: the sensitivity of the circuit can be varied changing r4 value.
c4 value can be varied from 220 to 470nf in order to change the circuit speed-response to music peaks.
adopting the additional circuit, only one item for r10, r11, q1 and q2 is required to drive up to ten led strips. on the contrary, one item of r9 and q3 is necessary to drive each strip you decided to use.
each r9 input must be connected to ic2 output pins, in place of the leds d2-d11 shown. r8 must also be omitted.
whishing to use a lower number of leds or led strips, pin #15 of ic2 must be disconnected from ground and connected to the first unused output pin. example:
if you decided to use 5 leds, pin #15 of ic2 must be connected to pin #1; if you decided to use 8 leds, pin #15 of ic2 must be connected to pin #9 etc.
current drawing of the circuit is about 10ma.
whishing to use a wall-plug transformer-supply instead of a 9v battery, you can supply the circuit at 12v, allowing the use of up to 6 leds per strip, or at 15v, allowing the use of up to 7 leds per strip.
采集设备不能通讯怎么办 多通道振弦采集仪数采仪
三款流水灯控制电路图分享
分板机趣谈
TDA4565引脚功能的电压资料参数
看发那科由机器人生产机器人的工厂
舞蹈发光二极管电路--Dancing LEDs
拥有26000个GPU的“A3”超级计算机，能为谷歌赢下AI反攻战吗？
iPhone15最新爆料：iPhone15Pro减轻约10%
索尼回应 “已恢复对华为供货”：不评论特定客户或业务
双积分型模数转换器结构及工作原理分析
2022年前三季度：Exyte表现强劲，订单量、销售额和盈利稳步增长
践行绿色低碳，浪潮存储如何做到开源节流
百度信息流广告前景被市场所看好，AI助力百度广告向前发展
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从无人机到机器人，大疆的下一步？
面向过程与面向对象的区别
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