Thanks for your videos. I'm going to introduce my grandsons to the wonderful world of electronics. Your channel looks like it would be a very helpful resource.
Thanks! We have a ton of other electronics projects and tutorials on our channel, you may want to check out our playlist page: www.youtube.com/@Science.Buddies/playlists
I am actually knew to the breadboard deal in fact I learned more just because of your video about breadboards. Is it possible I can make at least one slight modification? I do have the battery caps with the wires but the thing I ask is. Can I substitute that with one of those fancy power modules? They usually usually take both positive and negative railings on each side of the breadboard.
It depends on what exactly you mean by "fancy power module." According to the NAND gate's datasheet it can handle up to 20V for the power supply: www.ti.com/lit/ds/symlink/cd4011b.pdf?ts=1679250116000&ref_url=https%253A%252F%252Fwww.google.com%252F. So for example a 5V breadboard power supply would be fine.
thank you for the tutorial. lets say I want to have a different level of moisture Resitor(R1,R2?) should be replace? and what must be the value(greater than 100Ω or less than)?
If you want better control over the moisture threshold we recommend using an Arduino instead, see this project: www.sciencebuddies.org/science-fair-projects/project-ideas/PlantBio_p055/plant-biology/arduino-automatic-plant-watering
@@Science.Buddies thanks but it would be nice if doing it in a cheaper way. I was able to adjust the value of the resistor by using potentiometer instead 0f 10M Ohms/
It's not *quite* as simple as just adding the pump - the output of the integrated circuit can't provide enough current to drive a pump directly. These videos will help: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ojhrVsBs0nM.html and ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-To3DKP99-1U.html
Thank you! This was very helpful. If I may ask just one question though, I'm having trouble understanding what potentiometer to use to replace the resistor so I can fine tune when the light should come on. Any advice would be great here. (I did see the doc on using 3 pot -> 10k + 100k + 1M, but I didn't quite understand the implementation. Also, if I can use just 1 pot would be simpler for me)
Hi - the resistors in our kit are 1/4W. As for the potentiometers - you can just use a single potentiometer, but that will make it difficult to make coarse or fine adjustments depending on the size of the potentiometer. For example, for a 1M potentiometer, a very small change in angle of the knob results in a very large change in resistance. If you put a 1M potentiometer in series with a smaller potentiometer, then you can use the 1M potentiometer for coarse adjustments, and the smaller potentiometer for fine adjustments.
thank you, that makes sense. I'm now having a different issue where the connection is made too easilly, even on dry dirt, it still connects and shuts off the led. Am I right to assume that I need to increase the resistance?
Hi - you can try a bigger resistor, but you may also want to consider moving up to an Arduino version of this project with a soil moisture sensor: www.sciencebuddies.org/science-fair-projects/project-ideas/PlantBio_p055/plant-biology/arduino-automatic-plant-watering. The non-Arduino version gives very coarse on/off results, whereas the Arduino version is more customizable.
yeah I was considering arduino but I don't undertand enough to chose a model at the store. I'll take a look into that article. thank you very much for being so helpful
