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Can it run BASIC

this is dope. i wondered how it is done...so it is code burned onto the chip...never knew

Thank you very much!!!! It helped me a lot in solving the problem🙏👍

@00:00 Now thats a Breadboard....Jealous

Thanks, I had exactly the same problem and this fixed it. Great explanation!

This is a very old computer, but have you checked if it is Y2K compliant? This is very important, if not people show up on leap-years day when they would have ben free, or people bring back their rental video to late.

This is wonderful. The microprocessor / microcontroller is interesting, because it was used in a navigator of some kind. How could a jet fighter have been ordered around if the navigating processor only has 64 bytes of memory? I guess it only worked with the four directions of the wind and a home-button.

Can i add an additional 2 tb m.2 And two additional 1 tb ssd drives for a total of 4 tb ? Also do these not come with a OS pre installed? When i turn it on?

Awesome video, thanks for taking the time to make this. It really helped me get these costco switches that I bought online Nov 5, 2023 in a three pack to work. One change to the version I got... they are actually using the BK7231N chipset. Now if you try to flash the BK7231N UART file from github you will get a CRC not equal error: $ python uartprogram ~/Downloads/OpenBK7231N_QIO_1.17.661.bin -d /dev/ttyUSB0 -w UartDownloader.... programm.... CRC not equal : |##################################################|[ 15.0k/s] To correct you have to add the -u and -s 0x0 to flash this particular chipset using UartDownloader: python uartprogram ~/Downloads/OpenBK7231N_QIO_1.17.661.bin -d /dev/ttyUSB0 -w -u -s 0x0 UartDownloader.... programm.... Write Successful: |##################################################|[ 14.8k/s] Thanks again!

Can it be programmed for long press and function as a dimmer?

Thanks for sharing. This is 10/10. In home assistant, under available entities for this switch do you only see on/off or is there dimmer entity as well? If you combine the switch with smart colour bulbs, will the dimming button cause it flashing (due to buttons lowering voltage) or you can setup the dimming buttons as smart buttons and assign home assistant action

I have the MK38P70 chip and programmed the EPROM that sits on the IC. It works as per your schematic. I am 68 and don't remember this computer, though that was a long time ago. I would like to use a more standard keypad which would require reprogramming the key scan routines. That's where my problem is. The disassembled file in your github has numerous errors in particular BF using the 90 op code and BF using the 94 op code which are supposed to be BR for 90 op code and BNZ for 94 op code. There are other errors in the disassembly that would require painful editing. Its a DASM program error obviously. I will continue with the project using discrete push buttons since it seems interesting with what I have proto boarded so far.

Amazing job figuring this out and providing a solution!

This is a great video, really don't want to take anything away from it at all. I love the very detailed approach. That said, I couldn't get it to work at first, and found some extra help on some web pages elsewhere. Two things that got me going: 1) I was getting a lot of disconnects on the UART, sometimes exactly when I plugged in the board. This was because it had an insufficient power supply. Having a steady, independant 3.3V power supply is almost mandatory for this procedure. Then connect the ground on that power supply to the one on the UART should solve disconnection problems. 2) Some UARTs just flat out don't play nice. The first one I tried was giving write errors, the second one wouldn't find the bus at all... and the third one I tried worked. Again, thanks! These switches are currently on sale near me for $30 (Canadian!) for three. Hoping to get this working in the whole house.

Thanks! I followed yr steps last night, and no luck, finally I found that my chip is BK7231N. I used python based flasher but I can’t connect the openbk device after setting wifi. So I turned to use gui-flasher and config the ssid & static ip at the same time. Finally, I success!

I watched ben eaters series ~1 year ago and I now love this kind of thing. Great job man

I have about 40 of these dimmers and 50 of the plug packs, as well as many of Feit's LED offerings of all varieties. I have other devices that are different manufactures, but have used Feit as much as possible due to great cost, and trying to keep as much in one brand as possible. I do not like the cloud, but have used it as such as I have not had the time to sit and poke around the firmware. I do have home assistant setup for my IP cameras. Besides the usual culprits of the cloud (tracking, etc...) the one big thing that drives me nuts is the constant having to power cycle (hard breaker shut off or plug removal) to reset communications. I found I get "device offline" errors periodically. No rhyme or reason. Sometimes its often, sometimes I can go months without the error. My biggest curiosity is how your operation and comms have been? I seen from another comment you have been using this setup now for a year? Hoping you say you had no offline error issues!

You could always display the input in the hex display and output to the matrix which is effectively 16 bit.

Great explanation. Thank you for producing these. Love to see the differences and enhancements. Geeking out on this series. I'm starting a similar project to really learn how all of this works in practice and have what may sound like a silly idea in regards to the control lines and would love your take or pros/cons. I'd like to make my build using PCBs and be as modular as possible in order to change things, upgrade parts, etc. I'm going down a similar path or model or the control lines (I need more than 16), but instead of having the 238, thinking of adding a +4 bit dip switch on each board to "set an address" and have each board receive that address instead of the single signal. Using an adder or comparator to decode. I realize this adds more ICs for the decode part on each board (say a few $$ is not an issue), but gives me more flexibility in configuring. Do you have any initial thoughts on this model? Yeah/Nay...

Just stumbled on this channel and geeking out the vids and all the info on GitHub. Is there a way to send you an email somehow?

What gauge wire are u using?

Also, another question just came into mind - is it possible to use a RaspberryPi to (re)flash this device since it does have on-board 3.3v its UART pins.

Is there any way to read the original firmware off of these units to back them up? I have a bunch of these dimmer switches - bought them from Costco in multipacks and would love to migrate them to be local IoT devices and not rely on someone elses' cloud service. Thanks.

This is great! Flashed my switch and it works great. I'm new to MQTT. I can get on off to work fine but when I add dimmer to the config.yml it won't update the current state anymore. I got around it by making 2 different light sections. If you could share your MQTT config that would be super helpful. Thanks for creating this.

It would be helpful if you described what youre doing during install.

Thank you for the explanation, great video

18:28 im only one who reset count on micro code.cpu model is faster when not allways need 8 step

17:35 yes same as A/B/OUT. just register latch data out and in

take register a desing put it in IR and same thing for IRD yes they just 2 register hold data xD same time need change ram for 8bit. even IRD not actuallt need we allready know after read op next is data and we move it straight to ab or out what eva, but nice hace d register LOL. no one stop me make HL pair LOL

Hello, I just learn OpenBK today and was able to flash my new dimmer switchs. Everything work good and I even tweak the Autoexec.bat file to control the LED Status light on POWER state. so led turn OFF when lights ON. this help to find the switch when room is dark. I post my Script on the forum thread of Feit Dimmer

Great video! I will updated the firmware of my switches soon with the procedure that you described, so I will be able to control them with Home Assistant! Thanks for the effort to make this video and the clarity of your explanations!

I’m not as concerned with the cloud service scenario.. however I’d like to use these on Apple Home… it doesn’t seem super straight forward, do you have any guides or recommendations on how I go about doing this?

Hi ,thanks for the video. What is the name of the ssd cable and where can I get one?

Hi, can I use this tool to save a copy of the original bin file? I have one dimmer that I may have screwed up. I would like to use the original bin from one untouched dimmer and put it on the bad one. Is this possible? Thanks.

I wish that I can changed the video card on that it would be cool if they sell GPU chip for Nvidia GPU that would be damn cool if they sell that way

Fantastic little add on to play with the expansion port. Also, really like that purple PBC. I've got a minimal built out on bread boards and it's nice to see another person tinkering with it in addition to slu4 of course.

2 AND chips, a NOR chip and 2 XOR chips. I think it might fit but I wonder what the propigation delay would be. At least the 2 AND chips were completely used.

Even though there are many wires you did a great job organising them.

If you use an mqtt broker like mosquito won't HA autodetect the switch? I'm new to mqtt, but I thought HA will autodetect devices on the same network as the HA server.

Putey what a beauty !😊

1:03:20 so you made a function that generates a random number?

Thank you,you are my life saver!I deal with it all day and find this video!

So many wires!

Promo-SM 🌷

Thank you for going in to details on what the analouge parts of the board does, like what the diode is for, and how the transistors are used to ground the leads to the digit displays etc. I learned a lot! I found this video very entertaining and interesting, and I am looking forward to look at the rest of your videos! Happy to have found your channel!

Ok I have a question about the Schottky diode part of the solution. When the clock goes high the capacitor is charged. when the clock goes low how does the capacitor discharge with the Schottky diode in the way of current flow?

Thank you.

There is other way to make a stack pointer, i see some other videos building a simple register and use it as stuck pointer, i wich you could make a video on making a stack pointer standard for the simple guys like me. Thank you for sharing your knowledge.