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Powering a Mega 2560
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Re: Powering a Mega 2560

by kcl1s on Sat Mar 14, 2020 12:42 pm

Yes that is how I would wire the SSR using a N- channel mosfet. A search for for the particular mosfet (IRFZ44N) you list in the schematic shows it may not be the best for your application but may work OK with the limited current of the SSR trigger. This article explains https://components101.com/mosfets/irfz44n-datasheet-pinout-features

Keith

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Re: Powering a Mega 2560

by adafruit_support_bill on Sat Mar 14, 2020 1:39 pm

That looks good. If using the IRLB8721 from the store, the pull-down resistor is not necessary (but it doesn't hurt anything to have it there).
https://www.adafruit.com/product/355

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Re: Powering a Mega 2560

by somewhereinusa on Sat Mar 14, 2020 5:29 pm

Bill and Keith, thanks for the help. I think I have it sorted out now.

Dick

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Re: Powering a Mega 2560

by somewhereinusa on Tue Mar 17, 2020 3:31 pm

Problem solved. It was my bench top power supply. It's been running for about 5 hours now using a wall wort as 12V in to main power lug through the voltage reducer (7.5V) and powering the Mega at VIN and powering the relays. The ONLY time I had any dropped temperature readings was when I switched one of the voltage sense wires to the bench top power supply. As soon as I changed to another source for that sensor the problem went away again. Hopefully I won't have the problem when I install it in it's final resting place using the available power there.

Again thanks for your help.

Dick

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Re: Powering a Mega 2560

by adafruit_support_bill on Tue Mar 17, 2020 4:33 pm

Good to hear you found the cause. Thanks for the follow-up.

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Please be positive and constructive with your questions and comments.