/diy/ - Do It Yourself

yes
you will need a lot of trannies/resistors
a full adder i made is 17 trannies and 6 resistors
make sure you buy shittons of boards or embrace point to point
pro tip: point to point is hell to fix and debug but its cheaper and looks better if done well

if you want to make a whole cpu godspeed, i havent yet figured out how to use an eeprom and making gorillions of 1 bit cells is too autistic even for me

lost my 8bit adder and some actually epic p2p circuit pics

lost edition: >>1489791

>RULES
0. Electrics ≠ electronics. Mains wiring goes to /qtddtot/ or /sqt/. PC assembly to >>>/g/.
1. Know the law. You are assumed to understand Ohm's Law and Kirchhoff's circuit laws. If not, google.
2. RTFD. Re-read all documentation/datasheets pertinent to your components/circuits before you ask.
3. Pics > 1000 words. Post schematic/picture/sketch/9001.5 hours in MS Paint with all part numbers/values/etc. when asking for help. Focus/lighting counts.
4. Read posts fully before replying.

>I'm new to electronics, where to get started?
It is an art/science of applying principles to requirements. Find problem, learn principles, design and verify solution, build, test, post results, repeat.

>Project ideas:
http://adafruit.com
http://instructables.com/tag/type-id/category-technology/
http://makezine.com/category/electronics/

>Principles (by increasing skill level):
Mims III, Getting Started in Electronics
Platt, Make: Electronics
Geier, How to Diagnose & Fix Everything Electronic
Kybett & Boysen, All New Electronics Self-Teaching Guide
Scherz & Monk, Practical Electronics for Inventors
Horowitz and Hill, The Art of Electronics

>Design/verification tools:
LTSpice
falstad.com/circuit/circuitjs.html
NI Multisim
CircuitLab
iCircuit for Macs
KiCAD (pcb layout software, v5+ recommended)

>Components/equipment:
Mouser, Digi-Key, Arrow, Newark, LCSC (global)
RS Components (Europe)
eBay/AliExpress sellers, especially good for component assortments/sample kits (caveat emptor)
Your local independent retail electronics distributors
ladyada.net/library/procure/hobbyist.html

>Related YouTube channels:
mjlorton
paceworldwide
jkgamm041
eevblog
EcProjects
greatscottlab
AfroTechMods
Photonvids
sdgelectronics
TheSignalPathBlog
BigClive

>Li+/LiPo batteries
Read this exemplary resource first: https://www.robotshop.com/media/files/pdf/hyperion-g5-50c-3s-1100mah-lipo-battery-User-Guide.pdf
>I have junk, what do?
Take it to the recycler.

>>1494125
>can you swap the tube out with another?
I did that first thing. Even bought a new JJ because the guru geniuses on the guitar/amp message boards seemed to agree it was really quiet. One weird thing is that adjusting the volume knob effects the mechanical hiss. I think maybe it is just the amount of current flowing through the cathode. As well, lifting the ground from the tone stack seems to make it act up a bit to.

Between this and my last post I went through the three major B+ dropping resistors and found they were somewhat far off from their nominal values. One of the 15k ones was at 13k or so and the one that is supposed to be 10k was almost 13k as well so I went through my collection of those resistor and found the ones which were closest to the nominal values. The B+ on V3 is now about 393VDC which is marginally better.

Chop sticking the Volume pot also seemed to have some effect on it. I am reluctant to think that the hiss is coming from that, but removing the tube would also remove current flow from that pot so I could have been mistaken in my diagnosis.

Pic related is a gut shot for all you sinners. Please no bully, it was my first point to point build.