Dumb Question on Low Input Table Switching Circuit
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Dumb Question on Low Input Table Switching Circuit
OK, 
question time. I'm building the following on a daughter board:
The diode going to the switch is self-explanatory. What is the other diode doing, and why does is specify 5VDC from the TPS? I'm confused.
question time. I'm building the following on a daughter board:The diode going to the switch is self-explanatory. What is the other diode doing, and why does is specify 5VDC from the TPS? I'm confused.
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Thanks! That's what I thought, but wanted to confirm. Do you know what it does? It would seem to ensure that JS9 is always drained to at least 4.4VDC (assuming 0.6VDC diode drop). Is that the function?
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You have the diode drop backwards, but yes, it's there to clamp the voltage.
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Actually, it's normally a little below 5 volts - the diode makes sure it won't go over 5.6.
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