A project of mine is going to use an RGB numeric display. I was puzzling over how to keep all the segments a steady color as the numbers changed and segments go out and come on. This is a delightfully simple solution!
at 5:23, the words are inverted, it is the other way around, the right meter is for tension (not for current, tension which stay constant) and vice versa .. aside that , great demonstration that helped me a lot to understand
@@AllAmericanFiveRadio That package doesn’t look like a 2N2222?! The transistor seems more hefty?! Are you sure?! Also, isn’t 45 mA too much for an LED? I believe the correct current typically is around 20 mA.
Rick, How do i check the capacitors at the end of the IF transformers? Will the fact that they are connected to the coils affects a capacitance test? Thank you.
Very nice demo Sir. Could you tell me the transistor and zener part numbers, I like to duplicate this and do a little more experiment work with the circuit
Can I use this to generate a 4 and/or 20 mA constant current source !? or How could I make it using 24vdc source and what components are necessary to do so !? Thanks in advance :)
You could change the zener to about 2VDC. For 24VDC I would change the zener to 1VDC and the 195 resistor to 400. You can buy an assortment of zener diodes on eBay for not much money.
A project of mine is going to use an RGB numeric display. I was puzzling over how to keep all the segments a steady color as the numbers changed and segments go out and come on. This is a delightfully simple solution!
at 5:23, the words are inverted, it is the other way around, the right meter is for tension (not for current, tension which stay constant) and vice versa .. aside that , great demonstration that helped me a lot to understand
Dyslexia
add a 10uf or larger electrolytic capacitor in circuit behind that 5v zener Diode & it will stabilize the 5volt circuit
Thank You.
Nice video big thumbs up
Thanks
Thank you very much for the interesting video. Is it possible to give part no of the transistor and diode please?
Zener Diode 1N4733A 5.1V
Transistor NPN TIP31
dont trust him, hes a dirty lier!
Thank you Rick.
All my best.
Bobby
Thanks
What is the forward voltage for the LED that you use?
One LED volt was 2.680VDC, nine LED's voltage was 1.990VDC
+AllAmericanFiveRadio thanks for the info.
That's a very well designed & yet a simple circuit for driving the LED's. Thank you for that circuit.
Thanks
I enjoy your videos more and more. Great Video.
Thanks
What kind of NPN transistor is it? A 2N4401?
2N2222
@@AllAmericanFiveRadio That package doesn’t look like a 2N2222?! The transistor seems more hefty?! Are you sure?! Also, isn’t 45 mA too much for an LED? I believe the correct current typically is around 20 mA.
@@shvideo1 It is a power transistor but a 2N2222 will work. Did not need a power transistor. This current these LED's run at.
@@AllAmericanFiveRadio Thank you for the clarification. A great circuit and experiment. Really enjoyed it. Thank you for sharing.
Great videos. I love that prototyping board. I've been searching for one at a decent price because I don't think they're made anymore.
Thank you, and your welcome.
Rick, How do i check the capacitors at the end of the IF transformers? Will the fact that they are connected to the coils affects a capacitance test? Thank you.
Thumbs up done sir
Thank you, and your welcome.
What happens if I change led with resistor and what will be the current and voltage across transistor the load resistor and 100ohm resistor?
If the load resistor resistance is low enough the circuit will work the same.
Very nice demo Sir. Could you tell me the transistor and zener part numbers, I like to duplicate this and do a little more experiment work with the circuit
Any NPN transistor will work, I used a 2N2222. Also any 5 or 5.1 Zener 1 watt will work. You can find these part on ebay. Have fun experimenting.
Thanks
Can I use this to generate a 4 and/or 20 mA constant current source !? or How could I make it using 24vdc source and what components are necessary to do so !?
Thanks in advance :)
You could change the zener to about 2VDC. For 24VDC I would change the zener to 1VDC and the 195 resistor to 400. You can buy an assortment of zener diodes on eBay for not much money.
and that will generates a constant 4 ma and/or 20 ma correctly if I used 1K pot instead of 400 Ohm resistor !?
Put a 100 ohm resistor in series this the 1K pot
Good video. Thumbs up!