One day I intend to Build My Own 555 Timer.
In the recent past I posted How a 555 Works as a Timer which refers to an interesting video on the topic.
In that video the speaker gives us a mnemonic for remembering the transistor schematic symbols. Referring to the direction of the arrow on the symbol the “NPN” transistor “Never Points iN”. Good to know!
This was good: How a 555 Works as a Timer.
I got an email from one of the marketing people from PCBWay who said they could offer me free PCB printing services in exchange for a review of their service on my blog. I am very happy to do that!
Today I signed up for an account over here: https://www.pcbway.com/Member/Login/
The signup process was extremely painless: email address, password, terms of service, privacy policy, done.
(Note: I am not a lawyer, but I did read the ToS and privacy policy, and basically they claim the rights to your design files for various purposes and might transfer your data over an insecure network. I think these services are fine for hobbyists dealing with open hardware, but if you’re a commercial entity dealing with higher value intellectual property or larger volumes you might like to get legal advice before engaging.)
After logging in I got an email confirmation code emailed to me. I updated my account settings including my basic information and contact information so they know where to ship my PCBs. In exchange for my having filled out my full profile they gave me US$35 worth of vouchers with various terms (e.g. minimum spend).
I then used their shared project service to search for a 555 timer circuit that would meet my requirements. I found this one: Educational 555 Board.
I clicked “Add to cart” and accepted all the defaults (shown below) on my order for 5 PCBs. So far I am a happy customer! (Update: as part of our sponsorship deal PCBWay covered the shipping costs too! I was a bit worried they might ask me to cover the shipping, but they included it, which was super excellent, especially as the shipping was about five times as much as the boards themselves!)
I’m just getting started with PCB printing. I expect that in future I will do much more of it. I have been working my way through PCB design with KiCad – updated for KiCad 7 to learn how to design PCBs using KiCad. Apparently there is a PCBWay Plug-In for KiCad, so that might be something worth checking out.
When my PCBs from PCBWay arrive I will make a video of me putting together the 555 timer circuit and then using it to test my IC test probes. Stay tuned for that one!
So I’m interested in Open Circuits, an upcoming book from the guys at evilmadscientist.com. I’m also interested in four of their kits, being:
So the late Hans Camenzind is the guy who invented the venerable 555 timer. He wrote two books I’m interested in: