An other LM78XX regulator

[Koifarm]

No

 

[tomchr]

Neat project. I suggest replacing the MELF with something that's easier to solder. Susumu RG in 0805 would be much preferred and offer the same performance.

Tom

 

[Koifarm]

Thanks, no problems with the MELF resistors but you can also use other packages as you stated.
They stick nice in the solderpaste.

 

[baggerbole]

Which solderpaste do you use?

 

[Koifarm]

From aliexpress Best BST-510 just a view euro.

I do not use the needle. Just apply a big drop on a piece of paper and then apply the paste with the point of a pointed tweezer.

 

[AIM65]

Sorry for OT, but can you tell us more about your hot plate ? is it DIY ?, is there a temperature regulation ? I only see two wires.

I use the same method as yours : applying the paste and removing surplus with screwdriver and tweezer.
I found this solder paste not so good : it produces more flux residue than the one I was previously using (Chipquick) but was more expensive; and the board may remain sticking after IPA cleaning.

 

[Koifarm]

Just from aliexpress, no regulation. 600W.

https://nl.aliexpress.com/item/1005..._main.155.2f1979d2Bw4csP&gatewayAdapt=glo2nld

Just put the Bom list in post 1 for Mouser, Digikey, Farnell, Rs online, TME, Reichelt.

 

[AIM65]

Ok, thanks, I found one, very cheap ! https://fr.aliexpress.com/item/1005...89225063982e6238!12000035455141608!rec!FR!!AB
I'll try one.

 

[Koifarm]

This one I have. 600W heating power.

https://fr.aliexpress.com/item/1005...386e1739!12000029383180402!rec!NL!3320251976!

 

[AIM65]

ok, 600W...better, I'll get this one.

BTW : there's a regulation : heating element is a Positive Temperature Coefficient resistor.

thx

 

[Koifarm]

Made a mainboard to put the regulators on. And order regulator PCB's and mainboard together.

 

[zoom777]

@Koifarm beautiful. Thanks

 

[Koifarm]

 

[Koifarm]

After ordering the mainboard at JLCPCB, I had to pay extra money because of the two attached regulator PCB's.

Now I have connected the regulator PCB's with some traces to the mainboard and no extra payment is ask.

Updated the gerber file.

 

[zoom777]

@Koifarm ok, looks like they will also contact me on my order soon regarding the same issue. What did you do then? Request to cancel order and submit new order with the updated Gerber in post #34?

 

[Koifarm]

Yes, I canceled the order and got the money back. Then I ordered with the new file.

 

[androa76]

What is the minimal output voltage?

 

[Koifarm]

With this schematic about 6V, but you can modify the schematic for lower voltages.

 

[zoom777]

After ordering the mainboard at JLCPCB, I had to pay extra money because of the two attached regulator PCB's.

Now I have connected the regulator PCB's with some traces to the mainboard and no extra payment is ask.

Updated the gerber file.

I am lucky to have slipped through without being asked to pay more.

 

[Brijac]

You are usually charged more for dimensions over 100x100. Breakoff boards by themselves are not charged more specifically for being a break off board 🙂