FV is a +5v node
D8 allows RLY3 to act as an OR sensor; it allows RLY3 to use both transistors to turn on.
Because of D8, D3 needs to be put in place in order to make LED1D4 turn on when Q4 is saturated.
I am still unsure which type of signal diode to use for D8 and D3. They need to be low foward voltage drop, low power dissipation, and handle around 400mA or more. Thanks in advanced
**broken link removed**
D8 allows RLY3 to act as an OR sensor; it allows RLY3 to use both transistors to turn on.
Because of D8, D3 needs to be put in place in order to make LED1D4 turn on when Q4 is saturated.
I am still unsure which type of signal diode to use for D8 and D3. They need to be low foward voltage drop, low power dissipation, and handle around 400mA or more. Thanks in advanced
**broken link removed**