erice1984, The way the schematic is drawn the emitter and collector of Q1 and Q2 need to be reversed...
Dave Purola,
N8NTA
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erice1984, The way the schematic is drawn the emitter and collector of Q1 and Q2 need to be reversed...
Dave Purola,
N8NTA
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For 140mA drive, could the relay be replaced by a Mosfet or transistor instead?
Steve
It's not a bug, it's a random feature.
There's no problem, only learning opportunities.
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Most likely.Originally Posted by mister_e
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Aye, Thanks for pointing that out, Q1 and Q2 are correct, I have the resistors connected incorrectly, they should be hooked to ground instead of the 5v that the diagram is showing..
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how does it 'appear' now?
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*sigh* That is irritating....
Fixed T1 and T2
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Yet again, another change.... am I the only one this happens to?
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erice1984, few comments on your last schematic.
a) NPN transistors are wrongly used (emitter should be grounded).
b) PNP should have a base pullup resistor (4,7K will work).
c) Diode D2 should be placed across emitter and collector of T4 to be of any use.
d) Connector SL1 has two wires missing, since you will need ground and Vdd
Al.
All progress began with an idea
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I was thinking of replacing T1 and T2 with Optocouplers.
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