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ecuinputdata [2014/09/10 12:18] twdorris [ECU Input Impedance Mismatch] |
ecuinputdata [2024/03/15 11:16] (current) |
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In either case (1G or 2G) and for just about any input, you can also consider using a unity buffer to drive the ECU. Such a device presents a low-load input for connecting the external sensor and then produces a higher drive output for connecting to the ECU's input. The following schematic can be used to build this device. | In either case (1G or 2G) and for just about any input, you can also consider using a unity buffer to drive the ECU. Such a device presents a low-load input for connecting the external sensor and then produces a higher drive output for connecting to the ECU's input. The following schematic can be used to build this device. | ||
- | {{http://www.ecmtuning.com/images/forums/Buffer.JPG|Diagram}} | + | {{https://www.ecmtuning.com/images/forums/Buffer.JPG|Diagram}} |
Note that this is not necessarily an easy thing to do. The op-amp part referenced in that diagram is extremely small and difficult to work with if you're not familiar with SMT techniques or have access to appropriate equipment. | Note that this is not necessarily an easy thing to do. The op-amp part referenced in that diagram is extremely small and difficult to work with if you're not familiar with SMT techniques or have access to appropriate equipment. | ||
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If you can't wait and working with a SOT23-5 package is just too small for you, then consider this circuit/chip instead. It's a bit easier to work with. | If you can't wait and working with a SOT23-5 package is just too small for you, then consider this circuit/chip instead. It's a bit easier to work with. | ||
- | {{http://www.ecmtuning.com/images/forums/BufferDIP.JPG|Diagram}} | + | {{https://www.ecmtuning.com/images/forums/BufferDIP.JPG|Diagram}} |