Short update to my Whistle Activated Key Finder Electric Car
1,778 views · Published 12 February 2014 · 3:01 · Indexed 4 November 2026
Channel: GrandadIsAnOldMan · 2014 · Science & Technology
A few weeks back I made this Whistle activated Key Finder Electric Car with a very basic circuit taking the signal generated to make the key finder beep and using it to drive an electric motor. At the end of the video it was clear the circuit could be improved, certainly a short delay timer in the circuit to hold the motor on rather than just reacting to the pulsing beeps would make more sense. In tonight's episode I use a 555 timer to provide a delay to smooth out the pulses from the beeps. The key finder uses a sequence of beeps that I could probably build a counter to combine into a single pulse, so there is still room for improvement but I probably will leave it alone and move on to something else. If you have a question it is probably worth reading this video description first because the answer may already be here. To help you find my videos I made a YouTube search guide video https://youtu.be/ceBSOoOHcgw or checkout my playlists page https://www.youtube.com/user/GrandadIsAnOldMan/playlists?flow=grid&view=1 The first attempt at this project is here https://youtu.be/4Cm49q-uNYE This is a handy video by El profe García on using a 555 timer if you can handle Spanish https://youtu.be/6wH6E3eGaTc Main Components - Whistle Activated Key Finder 2 x 2N2222 transistor 1 x 555 timer 1 x 100K resistor 1 x 100K variable resistor 1 x 1K resistor 1 x 47 microfarad electrolytic capacitor 1 LED 1 diode 1 relay 1 small electric motor 1 x 9v battery 1 x AA battery and holder I think that is about all the main items + the rubber band powered car I converted The original build video is here https://youtu.be/4Cm49q-uNYE Some related playlists Electronic projects https://www.youtube.com/playlist?list=PLA5a2xPRSrB00lxaX8BD46F1QDJTe7Em4 Charity Shop Gold or Garbage https://www.youtube.com/playlist?list=PLA5a2xPRSrB14bwwnAIt54ZWwWBktc445 Things you can make from an old DVD drive https://www.youtube.com/playlist?list=PLA5a2xPRSrB2AwvfVAfa-hkYnqgquWjOl Bargain Store Projects https://www.youtube.com/playlist?list=PLA5a2xPRSrB0ZqYUdxXaQaJdg-cs3dKIi Filmed using FujiFilm FinePix S4800 Edited using Serif MoviePlus Starter Edition I have thousands of videos on YouTube covering a wide range of subjects. To find them follow my search guides https://youtu.be/ceBSOoOHcgw or https://youtu.be/Zj4UgwkwYRk or see my playlists page https://www.youtube.com/user/GrandadIsAnOldMan/playlists?flow=grid&view=1 Generally my projects are for my grandchildren to enjoy. OK, I enjoy them too. If anybody else likes them, that is a bonus. I like to keep my work as simple and basic as possible so that it can be copied easily and improved by anybody who wants to try themselves. I recycle or repurpose items rather than buy new and when I do buy I like to keep it cheap. https://www.youtube.com/user/GrandadIsAnOldMan
