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STD Flashing Light Challenge 2017 - @RobSmithDev

License: Public Domain

Mode: Editors' pick

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Update time: 2021-06-29 17:01:08
Creation time: 2017-07-22 07:43:59
Description
The circuits involved in the flashing light prize 2017 This was the most elaborate and badly made circuits I could make with the bits lying around. Entire setup is: Music is played into a microphone Microphone connected to 741 Preamp circuit with simple low pass filter 741 op-amp acts as a peak detector (using pot to trim to desired level) 1. Fed into a 555 one-shot monostable to produce pulses 2. Pulses turn on another 555 which generates an audible tone 3. Tone is fed into a 2.5Ghz audio/video sender 4. Tone is received by a 2.5Ghz audio/video receiver and fed into the Line In on the computer 5. An HTML5 page receives the audio, detects the pulses and calculates the BPM 6. The BPM is then predicted when the audio contains no beat 7. The HTML5 page connects to a web server via Web Sockets 8. Each time a beat is detected or simulated the phrase "BEAT" is sent 9. The server monitors connections and when it receives the phrase "BEAT" it transmits the phrase "Beat" (note different capitalization) to all other connected sockets. 10. A second web page fed from the web server is loaded on my mobile phone 11. When it receives the word "Beat" from the server it toggles the screen white or black 12. A solar cell sits on the phone screen, and when white triggers an op amp to swing full on or off 13. The op-amp output is fed into a transistor 14. The transistor switches on and off a relay 15. The relay when switched in one direction charges a capacitor from a 9V battery 16. The relay when switched in the other direction discharges it into the lamp! Simple eh Photo sensor detects and controls transistor which triggers and toggles one of them RF wall plugs. Power plug turns on a transformer which triggers spinning a motor left or right One side a capacitor is charged The other side it is discharged through the smallest lamp I can find
Design Drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity
1 10n C1 RAD-0.1 1
2 220u C2 CAP-D3.0XF1.5 1
3 1u C3,C4 CAP-D3.0XF1.5 2
4 Audio-PJ001 J1 AUDIO-PJ001 1
5 204-10UYC/S530-A3 LED1 LED-3MM/2.54 1
6 Header-Female-2.54_1x2 P1 HDR-1X2/2.54 1
7 1k R1,R3,R4,R6,R5,R8 AXIAL-0.3 6
8 330R R2 AXIAL-0.3 1
9 100R R5 AXIAL-0.3 1
10 NE555P U1,U2 DIP-8 2
11 9 V1,V2 BATTERY-1 2
12 4700u C1 CAP-D3.0XF1.5 1
13 1N4148 D1 DO-35 1
14 1k L1 1X02 1
15 BFY51 Q1 TO-92(TO-92-3) 1
16 10k R2,R9 RES-ADJ_3386P 2
17 12V Relay RELAY1 RELAY-SL-SRD 1
18 5 SOLARCELL BATTERY-1 1
19 OP07CP U1 DIP-8 1
20 33uF C1 CAP-D3.0XF1.5 1
21 10u C2,C4,C5 CAP-D3.0XF1.5 3
22 2.2u C3 CAP-D3.0XF1.5 1
23 20k R2,R4,R7 AXIAL-0.3 3
24 MICROPHONE U1 NONE 1
25 UA741CP U2,U3,U4,U5 DIP-8 4

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