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Binary decoder

https://tinyurl.com/yzwxsgem https://en.wikipedia.org/wiki/Binary_decoder Use in a switch to detect and use the off position https://tinyurl.com/yjy5d5tq Chips SN7404 Hex InvertorSN7414 SN7408 Quad AND gate or SN74138 3-Line To 8-Line Decoders/Demultiplexers Test...

Mobile Phones

Main Phones Motorola D368 1998- Motorola V2088 Motorola L6 Nokia Something Black Phone?? Motorola V3X Apple iPhone 4 Apple iPhone 6 2016 – 2021 Google Pixel 5 2021- Current SIDE PHONES Samsung J5...

Telephone Mini Motor Selector

I found this cool little old telephone selector on ebay, no idea of its age or origin. It looks to have 8 primary to 12 contacts per layer (Common to 0-9,-,N) the 9th layer looks disconnected. It looks to be a quadrant selector with four armatures per layer allowing...

FFMPEG Generate Quindar tones

https://en.wikipedia.org/wiki/Quindar_tones intro tone ffmpeg -f lavfi -i “sine=frequency=2525:duration=0.25:sample_rate=8000” -ab 8k -ac 1 -codec:a pcm_mulaw intro.wav outro tone ffmpeg -f lavfi -i...