File:Arduino-based wow-and-flutter meter schematic.png
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Arduino-based wow-and-flutter meter - schematic
Summary
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| Description |
English: Arduino-based wow-and-flutter meter - schematic. The outputs - 3.1 kHz oscillator and PWM to an external analog meter, and the battery monitor resistors R9-R10 - are optional. Uses a standard LCD display based on Hitachi HD44780 via the stock LiquidCrystal library (slow but it works). The choice of Arduino I/O pins is completely arbitrary, whatever fits your layout, except for the critical timer pins 6, 8 and 11 (associated wiring marked in red for input and green for output). Power can be either 2x lithium cells (7..8.5V) or 9-volt alkaline, although the LM358 stage remains so-so operational even at +5V supply.
Note that there are many fake Chinese LM358s on the market, and these are even slower than the original and won't produce the required pulse edges. I only tested it with second-source but good quality LM358s. Русский: Измеритель детонации (магнитофонов и ЭПУ) на основе ардуино. Схема обвеса. Выходные цепи тестового генератора и ШИМ-выхода на внешний микроамперметр, и резисторы монитора напряжения батереи R9-R10 - опция. Выбор ног ардуины совершенно произвольный, как удобнее в конкретном макете - за исключением выводов таймера (ноги 6, 8, 11). Питание - от двух литиевых банок (7...8,5В) или одной 9-вольтовой батарейки, впрочем, входной усилитель на LM358 сохраняет кое-какую работоспособность и при питании +5В. |
| Date | |
| Source | Own work |
| Author | Retired electrician |
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I, the copyright holder of this work, hereby publish it under the following license:
 
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This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 17:03, 1 June 2023 | | 4,693 × 1,729 (245 KB) | Retired electrician (talk | contribs) | |
| 12:38, 1 June 2023 |  | 14,017 × 5,121 (1.19 MB) | Retired electrician (talk | contribs) | Uploaded own work with UploadWizard |
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