Hey all I am wanting another set of eyes to review my schematic to make sure I have everything connected correctly. It looks like its connected correctly to me but another set of eyes on it is always a good thing!
I'm also wanting to find better substitutes for the C1 470uf and C2 1uf caps. Are...
Final schematic:
1) Removed LTV-356T Opto.
2) Added 10k between Base and Emitter of the PMBT3904.
3) Connected LED to 5v line instead of the collector line on the PMBT3904.
4) Replaced 200R with 220R.
5) Replaced normal fuses for blade fuse holders.
6) Replaced 18v G5LE-1 relay with the correct...
Hey all this would be my first try at creating a schematic in KiCad.
The schematic is a basic 2-channel relay.
The inputs are automotive 12v and gnd. This gets converted to 5v by the K78L05-1000R3.
The Wemos D1 mini has 2 digital pin outs that are 3.3v going to the LTV-356T with a 200 kOhms...
Hey all I am creating a PCB that allows me to detect when I plug in a tablet, laptop, etc. to my home made tablet organizer. It's difficult to see if it made a connection in the back since you place the tablet in the front and slide it back:
I'm using the INA219AxD...
Hey all I have 6 buttons that have the following voltage:
I want to hook up a 4N25 to each one of these so I can use the ESP32 as a "virtual push" to each of these buttons. When the button is pressed the 3.2vdc goes to ground.
To minimize the amount of wire going to each one...
Yes no data would be needed. Only power.
I was thinking today that I could use a limit switch in each decider for the tablet/laptop to hit causing the signal that it’s charging but that doesn’t really tell me it’s connected correctly and is actually charging.
Hey all I have a project I am needing to do but I'm unsure as to the best way to go about doing it.
What I am wanting to do is check to see if a tablet or laptop is plugged into the USB-c cable so that I can have a visual representation of confirmation that it is connected correctly.
Most of...
So I'm looking at my version of the ESP32 that I have (Known as the Lolin32)
And looking at their schematic I see that they call out GPIO 16, 17, 18 & 19. However, I do not have the same pin layout as they do...Go figure...
- GPIO 19 -> SWG main board clock
- GPIO 18 -> SWG main board data
-...
I have been trying to contact a forum member that has done a modification to his pool equipment in order to control it remotely instead of having to go to the box every time and check on the codes. His has released the source code on his github page.
However, I have a different model than he...
Hey all I am venturing into making a DIY reflow oven. Been looking at many different types/styles over the last couple of years and feel now is a good time to start one.
I originally planned on building this type of toaster oven. Looked nice with a touch screen and all. It also didn’t use the...
I’m looking to create a project for my home. I am wanting to place window and door sensors (reed switch) and hook it up to my ESP32 wroom-32 (wemos) microprocessor. The version I have has the JST connector to hook up a LIPO battery to. I have 20 of these to use with a reed switch and a custom 3D...
I've noticed that the IC above has a TX/RX UART line(s) looking at the diagram on page 9 of the datasheet.
9.7 Port 4
Port 4 is an 8-bit I/O port with individually configurable pins. Port 4 pins are accessed directly by writing or reading the port 4 data register, P4 at location F5H...