I built an “improved” astable multivibrator circuit from:
IMPROVED ASTABLE MULTIVIBRATOR, by RAJU BADDI, National Center for Radio Astrophysics, TIFR, Ganeshkhind P.O Bag 3, Pune University Campus, PUNE 411007, Maharashtra, INDIA; baddi@ncra.tifr.res.in
Here’s the schematic of the improved circuit:
Original astable multivibrator post.
I built an astable multivibrator from discrete components:
I used 2N2222 transistors instead of BCS547.
I built a 3-transistor ring oscillator from discrete components.
In an attempt to gain some electronics knowledge, I bought $30 worth of components and breadboards from Amazon, and built a 2-transistor LED flasher.
I built a Z80-based RC2014 Zed computer from a kit.
I dropped my cell phone and cracked the screen, so I got a Google Pixel 6 and a wireless charging stand. I ended up looking up the “Qi” standard for these chargers. It seemed like the coils used to transfer energy weren’t particularly exotic in size, shape, material or manufacture, so I decided to try to receive some energy from the charging stand.
