SparkFun Forums

[kd5crs]

Hello. I've come across a circuit I want to build that has a Schottky Diode in it. I don't know much about those.

I'm trying to select the right diode to buy. The circuit diagram has the "arrow and S" symbol for the Schottky diode, and then says "1.2V" next to it. I'm not finding any Schottky diodes on Digikey with a rating of less than 5V, so is that 1.2V a mimimum value? If so, can I use the one Sparkfun sells (which I think is a 20V)?

If the diagram says "174k" next to a resistor symbol I'd use a 174k resistor. So it seems logical that I should be searching for a 1.2V schottky diode, if such a thing exists.

Thanks.

Edit: Oh wait, eureka. I was looking at the reverse voltage value. They do have forward voltage 1.2V ones. I guess that's what I want, then?

[leon_heller]

That symbol seems wrong for a Shottky diode, and the 1.2V doesn't make any sense. Perhaps it's a Zener.

[MichaelN]

Agree with Leon - sounds like a zener / voltage reference diode. The symbol for these is often used interchangeably with that for schottkys.

[Joeisi]

Mind posting the schematic for us to double check ourselves?

[Philba]

Context is important. Post the schematic.