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Electronics => Beginners => Topic started by: Hextejas on January 17, 2018, 11:56:58 pm

Title: How to identify a zener plus ptp wiring.
Post by: Hextejas on January 17, 2018, 11:56:58 pm
When I am doing some breadboarding and am finished, there are usually 1 or 2 zener diodes that I have used.
Question is how the heck do I identify them so I can refile them ? They are so tiny. I have been throwing them away. 😂

Next is that I would like to try my hand at doing some ptp wiring. I am not eager to start making my own pcb yet, so this seems like a fair compromise. Are there any kits that do this ? I th8nk that I need some kind of a wire wrap tool ( I have one ), plus some size of wire ( I have some 22awg ), a blank pcb with holes in it, and I guess some headers ?

Did I miss anything ?

Thanks
Title: Re: How to identify a zener plus ptp wiring.
Post by: Benta on January 18, 2018, 12:38:10 am
OK, I'll bite.
What's "ptp wiring"? Google returns gibberish.
Perhaps a well-phrased question would give more answers?
Title: Re: How to identify a zener plus ptp wiring.
Post by: jaycee on January 18, 2018, 12:57:29 am
point to point wiring
Title: Re: How to identify a zener plus ptp wiring.
Post by: Benta on January 18, 2018, 01:06:08 am
Quote from: jaycee on January 18, 2018, 12:57:29 am
point to point wiring

Makes very little sense in the context of the original question...
Title: Re: How to identify a zener plus ptp wiring.
Post by: james_s on January 18, 2018, 01:21:24 am
I use a resistor, power source and a multimeter to identify zeners. Just take a resistor of say 1k-20k, value is really not critical and connect it in series with the zener, then connect that to a DC source that is higher than the highest voltage zener you want to measure. Put the meter across the zener and you will have the value.
Title: Re: How to identify a zener and how to equip for point to point wiring.
Post by: Hextejas on January 18, 2018, 04:32:04 am
Well I hope that is clearer. 2 completely different topics.
I hope that its permitted.
Title: Re: How to identify a zener plus ptp wiring.
Post by: james_s on January 18, 2018, 06:39:20 pm
Permitted yes, but not really recommended. You are more likely to get good replies by posting separate questions unless they are very closely related.
Title: Re: How to identify a zener plus ptp wiring.
Post by: lordvader88 on January 18, 2018, 07:30:45 pm
I know that common zeners like a 6.3V 1N4735 ? or whatever, they are 1/2W and need about 44mA going through them to hit the 6.3V (or whatever it is). They are probably bigger then what u said.

1N4728A to 1N4764A
https://www.vishay.com/docs/85816/1n4728a.pdf (https://www.vishay.com/docs/85816/1n4728a.pdf)
That lists all the currents needed for them. 1/2W is sort of big, they get warm/hot.

I'd say just hook them up with a variable resistor and measure the voltage and/or current. I guess the I vs V levels off to flat line.