New answers tagged coil
2
votes
Protection for transistor driving a coil
Here's one approach: by equipping the coils with current sensors, you can detect if current in any one is excessive. I do that here with a transistor and current sense resistor for each coil:
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- 47k
1
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What is the best way to multiplex 64 coils?
The essence of the DGT suggestion
from BitLauncher in comments is that it uses 8 file-wise transmit coils, and 8 rank-wise receive coils, so half of the multiplexing is already done by the geometry of ...
- 174k
1
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Using MOSFETs to control series-wound flipper coil
The most obvious issue is that you're driving the MOSFET gates with an extremely large gate resistor. You need to drive them with a proper drive circuit to get them to turn on quickly without blowing ...
- 38.5k
1
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Not getting spark from ignition coil test circuit
The polarity of your battery is wrong and a typical good old ignition coil needs a capacitor of around 200 nF / 250 V across the switch for a powerful spark.
The secondary winding together with the ...
- 8,335
1
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Not getting spark from ignition coil test circuit
2.5V at the gate is probably not enough to make the MOSFET conduct well enough to generate a spark.
From what I find, it takes 4 milliseconds or more to "charge" a spark plug coil. You need ...
- 73.5k
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