Electronics > Beginners

Make Electronics book 2nd edition components list?

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ledtester:

--- Quote from: scatterandfocus on September 13, 2019, 01:22:52 pm ---ledtester, I only see LED's on Tayda with either 20mA or 30mA forward current.

--- End quote ---

Go with their "super bright" leds - there's a review which says they work well at 2ma. The "luminous intensity" is an indication of brightness and efficiency. The "20ma forward current" could be a maximum. Get a couple of each and you can get a feeling of what the intensity rating means in terms of visual brightness, driving current, etc.

ledtester:
Here's a discussion about the KENTO 540URC LED which suggests the "20ma" rating is a maximum:

https://www.diystompboxes.com/smfforum/index.php?topic=113742.msg1053874#msg1053874

scatterandfocus:
Thanks much bd139 and ledtester.  See, if I just bought kits I wouldn't have interacted with other knowledgeable people and found out about these sorts of things.

Looks like I'm going to have to find the DIP CMOS 74HCxx  stuff elsewhere.  Tayda only has a couple of these part numbers:

74HC00 2-input NAND
74HC08 2-input AND
74HC32 2-input OR
74HC02 2-input NOR
74HC27 3-input NOR
74HC393 counter

ledtester:
I would just get them at Mouser or Digikey - their prices are roughly the same as Tayda's and you'll get genuine chips which will be well packaged.

bd139:
Get the extras at Mouser for sure.

For ref, the Tayda ones come in anti-static foam and bags usually. Never had any problems with fake parts. I think they sold some hooky 1N34A's a while back and that was about it.

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