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Diode ID help please
Diode ID help please
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Old 6th February 2018, 03:16 PM   #1
Jeff Mills is offline Jeff Mills
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Default Diode ID help please

Are DP3 & DP4 hanging off pins 9 & 10 of the TL494 4148's (switching diode) or are they Zener diodes?

In suspect 4148 but If they are Zener's, how do I check what value they are? There are no markings - I even checked with my magnifying glass.

Thanks
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Old 6th February 2018, 03:35 PM   #2
MarioRestucci is offline MarioRestucci  Italy
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Quote:
Originally Posted by Jeff Mills View Post
Are DP3 & DP4 hanging off pins 9 & 10 of the TL494 4148's (switching diode) or are they Zener diodes?

In suspect 4148 but If they are Zener's, how do I check what value they are? There are no markings - I even checked with my magnifying glass.

Thanks
SURELY 100% 1n4148.
Typical configuration, 1n4148 in parallel at base and emitter of a bjt to turn on the mosfet.
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Old 6th February 2018, 04:39 PM   #3
Jeff Mills is offline Jeff Mills
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Thanks
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