Love this kind of content. I always find myself asking why an IC behaves the way it does. Now that I have a complete understanding I can apply that knowledge better. Great stuff.
I enjoy your way of explaining things. I have to sift through multiple RUclipsrs before I can find one I can listen to for more than a couple videos. I sure wish RUclips existed when I first started learning electronics in the late 90s, a channel like yours would have made things so much easier.
Fun facts for the control pin. If you use the low power CMOS version (7555 or equivalent) then the internal resistor divider uses higher resistance values, typically 100k or higher. So if you need a high impedance on the control go with the CMOS part. Also for the bipolar version you will probably need to put a capacitor on the control pin to help stabilize the voltage. The NE555 can draw substantial current briefly when switching between high and low states which can drag the voltage reference around causing instabilities in the switching. Usually this shows up as noisy edges in the output.
I don’t care what anyone else does. Your videos are always from an experience informed point of view. That is almost never the case on YT. Keep doing basic stuff.
The original NE555 was made by Signetics. Inventor just died in 2012 according to Wikipedia. I think all the 5xx parts were originally Signetics parts like the NE567 PLL tone decoder, NE560 family PLL chips etc... According to Wikipedia (source of all knowledge....) the 555 number has no relation to the 5K resistors but just was chosen by the marketing people. All their parts from that era were 5xx so makes sense. Wikipedia also says over 1 billion 555's have been made (as of 2017) and is probably the most popular IC ever made.
Love this kind of content. I always find myself asking why an IC behaves the way it does. Now that I have a complete understanding I can apply that knowledge better. Great stuff.
I enjoy your way of explaining things. I have to sift through multiple RUclipsrs before I can find one I can listen to for more than a couple videos. I sure wish RUclips existed when I first started learning electronics in the late 90s, a channel like yours would have made things so much easier.
Your explanations really click for me. Thanks for doing this!
Wow, I used the HP 427A decades ago and cool that you still have one. Great instrument. It probably belongs in a museum now, though! 😄
Fun facts for the control pin. If you use the low power CMOS version (7555 or equivalent) then the internal resistor divider uses higher resistance values, typically 100k or higher. So if you need a high impedance on the control go with the CMOS part. Also for the bipolar version you will probably need to put a capacitor on the control pin to help stabilize the voltage. The NE555 can draw substantial current briefly when switching between high and low states which can drag the voltage reference around causing instabilities in the switching. Usually this shows up as noisy edges in the output.
I don’t care what anyone else does. Your videos are always from an experience informed point of view. That is almost never the case on YT. Keep doing basic stuff.
The original NE555 was made by Signetics. Inventor just died in 2012 according to Wikipedia. I think all the 5xx parts were originally Signetics parts like the NE567 PLL tone decoder, NE560 family PLL chips etc... According to Wikipedia (source of all knowledge....) the 555 number has no relation to the 5K resistors but just was chosen by the marketing people. All their parts from that era were 5xx so makes sense. Wikipedia also says over 1 billion 555's have been made (as of 2017) and is probably the most popular IC ever made.
Great nuts and bolts.