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Testing the MC14495 Binary to Hexadecimal 7-Segment Latch Decoder LED Driver. Using a ULN2803A Darlington Transistor Array to interface the MC14495 to a common-anode display.
1PCS IC MOTOROLA DIP-16 MC14495P1 MC14495PI https://www.ebay.com/itm/1PCS-IC-MOTOROLA-DIP-16-MC14495P1-MC14495PI-/162781334419
https://pdf1.alldatasheet.com/datasheet-pdf/view/898352/MOTOROLA/MC14495-1.html
http://www.ti.com/lit/ds/symlink/uln2803a.pdf
#electronics
Testing the MC14495 Binary to Hexadecimal 7-Segment Latch Decoder LED Driver. Using a ULN2803A Darlington Transistor Array to interface the MC14495 to a common-anode display.
1PCS IC MOTOROLA DIP-16 MC14495P1 MC14495PI https://www.ebay.com/itm/1PCS-IC-MOTOROLA-DIP-16-MC14495P1-MC14495PI-/162781334419
https://pdf1.alldatasheet.com/datasheet-pdf/view/898352/MOTOROLA/MC14495-1.html
http://www.ti.com/lit/ds/symlink/uln2803a.pdf
#electronics
I have ordered this IC one month ago myself, just waiting to get them. So it was interesting to see this video. Maybe the ROM is becoming old and starts to forget?
are the 7-segs common anode or comon cathode?
Hi, thanks for the video, it’s a clear description for what you are trying to achieve without being baffling to beginners!
What wire are you using for your jumpers? I bought a bread board with a load of wires but they are not that strong and the gauge of the pins is such that they fall out easily. If I could buy a few reels of wire like yours it would be much easier and I could make custom lengths! Cheers. Pete
Here's a tip for you– that batch of diodes on the output side makes a dandy "lamp test" function, using their common point. 🙂
You could program an eeprom to do this with one chip and multiplex upto 4 anode displays using the extra adress lines
Have you got a source for the MC14495 datasheet? Your versions seems crisp, where I so far only found a bad scan of a datasheet.
Hi Thanks for this video . I did not know that this IC existed , my stocks of the similar
Fairchild 9368 & 9370 are low so I ordered 5 MC14495 from the cheapest seller ( Polida )
on Ebay on the 13th Aug . They arrived yesterday , without any static protection but I have
just tested them and they are all ok . You had very bad luck in getting a faulty one and the
delivery time being so long .
Thanks again
Alan
Just found you, new subscriber now!!!
Cool chip, thanks for the ref. I was practically yelling at the screen to add a cap to the circuit. I just had a similar issue with a CD4017 circuit where it needed a cap. (Glad I didn't get too enthusiastic and said something stupid b4 watching the whole vid 🙂
Loved the edited directors cut dialogue drama.
The lesson I take from this is the reminder always buy more than one IC. I know I resisted that advice for awhile. It only takes a few days wasted chasing ghost problems to learn the value. I learned the hard way…and still need the reminder.
The best deal I found for 0.56" Common Cathode 7seg displays (for an ICM7216D project) was $0.0956 each by purchasing 50× from an AliEx seller for $4.78. The part number is 5161AS. The shipment took 6 weeks to Los Angeles. Has anyone found a better deal than that? I need to get some dirt cheap common anode's for another project. The seller has the anode version for the same price too.
Thanks for the upload.
-Jake
BTW does anyone still make breadboards like were used here? What do I even search for to isolate stuff like that on eBay, (brands/niche terminology)?
Julian have you tried the new version of the QD185-FC 2 ? Could be your new favorite Power-bank, has multi voltage input and output !
Cant you use an ULN2801(darlington array) to run your common Anode ? One of the family of ULN280xA is an inverter, if I remember right. With the results that you only need one resistor between the LED and the ULN2801 ? Oh never mind you got it.
Those are not NOS MC14495s but rather reclaimed and refurbished ones. The marking is fake, the original one is under a layer of paint. Don't buy ICs from random sellers in China.
Just get some TIL 311… the most beautiful DIL display ever… no need for ULN2803, no need for MC14495 and they are a work of art not like those chinese cheapos …
If you only had the one chip which was defective, how would you have found it out?