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free-dmo / free-dmo-stm32

Endless freedom for D.MO 550 series label writer printer.
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Resistor 4.7kΩ #41

Open forkyboy opened 3 months ago

forkyboy commented 3 months ago

Hello,

I'm currently searching for a 4.7kΩ resistor, but I'm quite new to this and noticed there are various types of resistors available. Could you help me figure out the wattage I need for such a resistor? For instance, when I look on Amazon, there are many versions of a 4.7kΩ resistor, and I'd appreciate any guidance you could provide.

https://www.amazon.com/s?k=4.7k%CF%89+resistor&crid=2ORN48GS8L1RX&sprefix=Resistor+4.7k%CE%A9%2Caps%2C166&ref=nb_sb_ss_ts-doa-p_1_14

Also, I have a secondary question: Is Dymo implementing DRM to the extent that they take legal action against individuals who modify their printers? I'm curious because it seems odd that there isn't a market for modified Dymo 5XL printers, given this context.

Thank you very much for your help!

KudzuKid commented 3 months ago

I suspect even the 1/4W would be fine, but use 1/2W if you just want peace of mind. Anything over what you really need isn't hurting anything, and usually gets more into issues of physical space & placement. We're not dealing with a 1500W hairdryer or toaster oven here. These are low-current, low-voltage components. 4.7K Ohm are extremely common. As to WHY they are used, Let Me Google That For You... See here:

Link to Why 4.7K Resistors are commonly used and what they do!

I just wouldn't go above maybe a 1/2W. In case of a surge, etc; you don't want the BluePill "protecting" the resistor, you want the resistor to protect the BluePill... maybe that's why you typically buy 100 resistors at a time. I think I used 1/4W in mine. Enjoy the project.

Edit: To add a little more info about the resistors.

forkyboy commented 3 months ago

Thank you, everything is clear for my build now.

I appreciate all the infos.

From: Kudzu Kid @.> Sent: Saturday, March 16, 2024 1:58:52 PM To: free-dmo/free-dmo-stm32 @.> Cc: forkyboy @.>; Author @.> Subject: Re: [free-dmo/free-dmo-stm32] Resistor 4.7kΩ (Issue #41)

I suspect even the 1/4W would be fine, but use 1/2W if you just want peace of mine. Anything over what you really need isn't hurting anything, and usually gets more into issues of physical space & placement. We're not dealing with a 1500W hairdryer or toaster oven here. These are low current, low-voltage circuitry here. 4.7K Ohm are extremely common. As to WHY they are used, Let Me Google That For You... See here: https://www.jotrin.com/technology/details/what-is-a-4k7-resistor-4-7k-ohm-resistor-color-code#:~:text=4.7k%20ohm%20resistors%20are%20commonly%20used%20in%20oscillator%20circuits,generate%20a%20precise%20frequency%20signal.

— Reply to this email directly, view it on GitHubhttps://github.com/free-dmo/free-dmo-stm32/issues/41#issuecomment-2001995314, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AI5DVO67UHISBA4QXUCZJLLYYRFZZAVCNFSM6AAAAABEZF7EC6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAMBRHE4TKMZRGQ. You are receiving this because you authored the thread.Message ID: @.***>

KudzuKid commented 3 months ago

Thank you, everything is clear for my build now. I appreciate all the infos. … ____ From: Kudzu Kid @.> Sent: Saturday, March 16, 2024 1:58:52 PM To: free-dmo/free-dmo-stm32 @.> Cc: forkyboy @.>; Author @.> Subject: Re: [free-dmo/free-dmo-stm32] Resistor 4.7kΩ (Issue #41) I suspect even the 1/4W would be fine, but use 1/2W if you just want peace of mine. Anything over what you really need isn't hurting anything, and usually gets more into issues of physical space & placement. We're not dealing with a 1500W hairdryer or toaster oven here. These are low current, low-voltage circuitry here. 4.7K Ohm are extremely common. As to WHY they are used, Let Me Google That For You... See here: https://www.jotrin.com/technology/details/what-is-a-4k7-resistor-4-7k-ohm-resistor-color-code#:~:text=4.7k%20ohm%20resistors%20are%20commonly%20used%20in%20oscillator%20circuits,generate%20a%20precise%20frequency%20signal. — Reply to this email directly, view it on GitHub<#41 (comment)>, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AI5DVO67UHISBA4QXUCZJLLYYRFZZAVCNFSM6AAAAABEZF7EC6VHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDAMBRHE4TKMZRGQ. You are receiving this because you authored the thread.Message ID: @.***>

Updated with just another thought or two.