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Cutout issues (again)
#14
Hi Harry

The Cathode of the Texas SM74611 chip (Tab and centre Pin 2) connects in place of the A terminal of the cutout. This then usually feeds via the Charge/Lighting switch through the Ammeter and then to the Battery positive.

The Anode of the 74611 (Outer Pins 1 and 3, connected together) connects in place of the D terminal of the cutout. This is fed from the main D output of the dynamo.

Current flow when charging is from Anode to Cathode

The average heat dissipation of this device is less than a quarter of a watt, so the package should not need any additional heat sink.

Later cars like the Ruby had a cutout which also incorporated the resistor for the "half charge" circuit. You will have to make separate arrangements if you want the half charge feature.
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Messages In This Thread
Cutout issues (again) - by JoeRowing - 13-08-2022, 05:42 PM
RE: Cutout issues (again) - by Ivor Hawkins - 13-08-2022, 06:23 PM
RE: Cutout issues (again) - by David Stepney - 13-08-2022, 07:58 PM
RE: Cutout issues (again) - by JoeRowing - 13-08-2022, 11:02 PM
RE: Cutout issues (again) - by bob46320 - 14-08-2022, 07:17 AM
RE: Cutout issues (again) - by Howard Wright - 14-08-2022, 07:32 AM
RE: Cutout issues (again) - by JoeRowing - 14-08-2022, 09:40 AM
RE: Cutout issues (again) - by JoeRowing - 14-08-2022, 01:20 PM
RE: Cutout issues (again) - by John Cornforth - 14-08-2022, 02:27 PM
RE: Cutout issues (again) - by Ray White - 14-08-2022, 04:12 PM
RE: Cutout issues (again) - by JoeRowing - 14-08-2022, 05:07 PM
RE: Cutout issues (again) - by daveg - 14-08-2022, 05:48 PM
RE: Cutout issues (again) - by HarryAusten7 - 30-08-2023, 08:17 AM
RE: Cutout issues (again) - by John Cornforth - 30-08-2023, 11:45 AM

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