Low-battery indicator circuit

I designed this little circuit to show a battery’s status.

It lights an led to show the battery is OK, and will change to show another colour when the battery’s low.

The transistors can be any npn-type, and the leds can be any colour (in the diagram, green=ok, red=low)

The operating voltage range is ~3v-12v, and by adjusting the resistor values it will work beyond that.

The voltage the low led comes on at, is set by the potentiometer.

Momentary latching circuit

Here is a little circuit I made that will allow a momentary switch to turn on/off a load.

Q1 can be any NPN transistor, and Q2 is any N-channel MOSFET capable of handling the current being switched. It should be fine with a range of ~5-12V but I've only tested it at 7.4V.

It somewhat mimics the action of a newer console's power button. I made it so I could switch a relatively large amount of power with a small tactile switch, press for on, press again for off.

Shipping delay update :(

I apologise for the lack of information recently regarding the delays in shipping the Mini NES electronics kits.

Unfortunately I've had some major QC issues with the PCBs that's meant I haven't been able to ship on time.

This has effected batch 2 onwards and after a lot of back and forth between me and my board supplier I finally have the defect sorted out and from next week will be able to resume shipping kits.

Mini NES Electronics Kit Status Update #2

So this last week or so I haven't posted anything about the Mini NES project and that's only because I don't really have any new developments.

I'm still waiting for the final production PCBs, they're due to arrive this Thursday 15th.

In the meantime I've just been preparing everything ready to assemble the kits and there's not too much to report about that.

If you're in Batch 1 or 2, then you'll already know your ship date. There's still some stock left in Batch 3, if you ordered from the 3rd batch then you'll receive an email with more details soon.

I'll be able to shoot the rest of the assembly guide videos this weekend when I have the final kits on hand so look out for those.

Also, I've been working on some new designs and will hopefully be able to show them off later this week.

If you have any questions or concerns you can contact me using the form in the sidebar or send me an email.

Mini NES Electronics Kit Status Update

This post is an update on the progress of the Mini NES Electronics Kit.

As you might know, last week I released the 3D files for the case so people can start on their build.

Unfortunately, since then I haven't been able to make much progress on the project because I've been waiting for the sample PCBs to arrive so I can test and approve them.

Well today they turned up, so I'll be testing them tonight and will make the final order in the next couple of days.

During that time I'll send an email to everyone who's ordered a kit, with more details and an estimated shipping date.

I apologise for the lack of direct communication so far, but this is the first time I've done something like this and don't have a proper store set-up.

If you have any concerns or questions, you can contact me from the form on the sidebar, leave a comment here or email me at 'mike' 'at' my domain name.com

Look out for an update video on the kits soon.