Is in possible to re-purpose this microwave control board to use it as a clock and create a timed recepticle? The attached is from a Samsung Microwave

 

Here is a photo of both sides of the board

 

Anything is possible, but is it worth the effort?
You can learn a lot more by programming an MCU yourself. The only parts that would be worth reusing is the keypad and display.

 

Anything is possible, but is it worth the effort?
You can learn a lot more by programming an MCU yourself. The only parts that would be worth reusing is the keypad and display.

Thanks MrChips not sure I understand your response... Programming an MUC?? The keypad and display of the Microwave board is what I had hopped would be re-usable rather than throw it out as junk.

 

Thanks MrChips not sure I understand your response... Programming an MUC?? The keypad and display of the Microwave board is what I had hopped would be re-usable rather than throw it out as junk.

The control panel has to have some intelligent controller. This is the MCU = microcontroller unit.
You can see one corner of the MCU sticking out from under the display.


Before you attempt to repurpose the entire board, check if the display is LCD (liquid crystal display) or LED (light emitting diode) display. Check what connections go to the display. Is it a soldered connector?

Check also the connector to the keypad. Is it a flat flexible cable onto a cable connector? These will determine if you can reuse the display and the keypad.

Also, check what powers the entire board. It may be possible that the entire board is usable as is. Apply the correct power input and find the output of the relay that controls the oven.

 

The control panel has to have some intelligent controller. This is the MCU = microcontroller unit.
You can see one corner of the MCU sticking out from under the display.
View attachment 363577

Before you attempt to repurpose the entire board, check if the display is LCD (liquid crystal display) or LED (light emitting diode) display. Check what connections go to the display. Is it a soldered connector?

Check also the connector to the keypad. Is it a flat flexible cable onto a cable connector? These will determine if you can reuse the display and the keypad.

Also, check what powers the entire board. It may be possible that the entire board is usable as is. Apply the correct power input and find the output of the relay that controls the oven.

Programming sounds interesting but much to complexe for an old dog like me?? I enjoy taking something people call junk and find new purpose for it with most of my knowledge coming from the internet and help from people like you and many thanks for that keeps me occupied. To answer some of your questions; The cable to keypad is flat and into a cable connector. I have no idea if the display is LED or LCD or what powers the board. The relay JR JB024W is rated 24vdc and 16 amp 250 VAC and 20 Amps 125VAC. The power to the MWO went through a filter photo attached

 

Can you repost the photos of the top side and bottom side of this board?
This time, aim for the highest possible resolution and ultra sharpness. I need to be able to read all the markings on the board.
It would appear that you can apply 120 VAC to the board and it would be functional as a timer.

 

Is in possible to re-purpose this microwave control board to use it as a clock and create a timed recepticle?

A member (Tonyr1084) has done this - for some reason, @ reference not working. https://forum.allaboutcircuits.com/threads/microwave-oven-control-board-controlled-outlet.171235/

 

A member (Tonyr1084) has done this - for some reason, @ reference not working.

Tonyr is no longer a member of AAC.

 

Can you repost the photos of the top side and bottom side of this board?
This time, aim for the highest possible resolution and ultra sharpness. I need to be able to read all the markings on the board.
It would appear that you can apply 120 VAC to the board and it would be functional as a timer.

View attachment 363592View attachment 363593

Try these hope they are better. Best I can do for now with natural light

 

Yes, it is possible.
I did just that about 20 years ago, removing the panel and installing it in a box and adding a power lead and socket to give me a mains timer.

 

Yes, it is possible.
I did just that about 20 years ago, removing the panel and installing it in a box and adding a power lead and socket to give me a mains timer.

After 20 years it might be a bit strached to ask if you might remember the power hook-up and would care to share

 

I found it in my shed, and it still works.


The yellow wire feeds Active in to the relay contacts and the curled up white wire is the switched active out.

 

120 VAC power comes in at the red connector CN02.
LINE on the left pin and NEUTRAL on the right.
Relay RY01 plays a role. Not sure as yet what activates this relay.
Without applying power, flip the board over and test for continuity at the relay contacts.

 

120 VAC power comes in at the red connector CN02.
LINE on the left pin and NEUTRAL on the right.
Relay RY01 plays a role. Not sure as yet what activates this relay.
Without applying power, flip the board over and test for continuity at the relay contacts.


View attachment 363609

View attachment 363612

No continuity on Relay contacts. CN03 is the door switch do that have to jumpered?

 

Apply 120 VAC at the red connector and see of the display turns on. If not, jumper across the relay contacts.

 

Apply 120 VAC at the red connector and see of the display turns on. If not, jumper across the relay contacts.

120vac on the red connector do not turn on the display however jumping across the two contacts just above the relay contacts you point to will turn on the display

 

120vac on the red connector do not turn on the display however jumping across the two contacts just above the relay contacts you point to will turn on the display

That is the part I don't understand.
The relay has to be energized to send power to the low voltage transformer. I don't see what turns on the relay.
Until we find out, continue with your objective.

Connect the keypad and see if you can get the controller to function as a count down timer.
The next step is to see if the big black rely gets activated.

 

That is the part I don't understand.
The relay has to be energized to send power to the low voltage transformer. I don't see what turns on the relay.
Until we find out, continue with your objective.

Connect the keypad and see if you can get the controller to function as a count down timer.
The next step is to see if the big black rely gets activated.

Here are photos of the orginal connectors and the wire colours if it will help, the only problem is that some of the wire have been cut put the connectors ar all in tack plus the 120vac was supplied through the filter circuit I posted earler in post #6

 

That is the part I don't understand.
The relay has to be energized to send power to the low voltage transformer. I don't see what turns on the relay.
Until we find out, continue with your objective.

Connect the keypad and see if you can get the controller to function as a count down timer.
The next step is to see if the big black rely gets activated.

With the key pad connected and the relay energized it is fuctional for the Clock and the count down timer no problem. Selecting any other function and it will not start I suspect due to the door switch?