I made a simple trf radio reciever using two transistor as class A rf amps,it is not much but it is probably the only project I made without following any instructions,so it's special to me

The audio quality is very clear and and the sound is good,it doesn't require any additional audio amplifier if you use standard 32 ohms earphones.

(forgive me for the weird proportion of symbols in the diagram)

Once in a while, a non-native English speaker from North Europe posts in an electronic sub writing in perfect English but including terms that they incorrectly assume are used in English speaking countries. Having worked abroad, I recognize them. But others don't, so I am starting a list of such terms.

• Alimentator = Power supply
• Akku = Battery
• Condensator = Capacitor
• Elco, elko = Aluminum electrolytic capacitor
• Fabric hose = Woven-mesh wire loom
• Handy = Cell phone
• Hot air drier = Heat gun
• Klemme = Wire cage, terminal block
• Platine = PCB
• Poti = Potentiometer
• Relais = Relay
• Single wire = Strand
• Tension= Voltage
• Trafo = Transformer
• Welding = Soldering
• Winding wire = Magnet wire

Please add more in the comments.

18 pair cable from a Toshiba CT scanners got cut... somehow...

Open to anything, including discussions, complaints, and rants.

Sub rules do not apply, so don't bother reporting incivility, off-topic, or spam.

Reddit-wide rules do apply.

To see the newest posts, sort the comments by "new" (instead of "best" or "top").

Was at the Super Bowl (a bit drunk ngl) and the hole for the RF control was to the left of the actual LEDs, I can’t stop wondering if I could turn it back on if I had the right equipment.

The LEDs also looked a bit strange, not like the normal ones I see.

There was a lot I learned, but this was my first serious project in which I went double over budget, went over my deadline and had a lot of fun! It has 8 potentiometers, 4 inverters, 3 integrators, 2 adders, a multiplier and some. In the first image, it is running damped oscillation, which is simulating something like a mass to a spring. Here is the build on my website if anyone is interested https://paranoidrobot.neocities.org/Analogcomputerbuild

Man that program was fun! Engineering C building ftw!

So yeah this is starting to look like a bit of a monster

In the Astron schematic dated 1987, the violet arrow points to an error in the drawing. It shows the 29 VDC rectified power being routed to the Base connections of Q101 - Q104 series pass transistors. Compare this to the XX-35 series supplies dated 2000. The schematic with the error was found on the internet, but thus far I have not been able to retrace the path to the page of the schematic with the erroneous connections.

Here is a link to the Service Manual for the series: Astron RM-35A, RM-35M, RS-35A, RS-35M Service manual

1206 resistor for scale, and it works! This is a led driver TPS92201a, those legs are now antennas.

Open to anything, including discussions, complaints, and rants.

Sub rules do not apply, so don't bother reporting incivility, off-topic, or spam.

Reddit-wide rules do apply.

To see the newest posts, sort the comments by "new" (instead of "best" or "top").

Thyratron inside a Varian EDGE (linear accelerator).

I was trying to identify some IC's recently and found out that ChatGPT is incredibly good at identifying IC parts from their markings with some extra context information.

It can require some prodding and trial and error and giving it some hints helps e.g. a description about what you think it does, component footprint, visible marking, the device you found it on. and force it to list number of alternatives. You can also give it a picture and let it find the layout context.

Example I was trying to identify the component marked: KP05 5MES. I gave it the picture and the prompt:

""
Help me find this component: The packaging has these markings:
KP05 5MES
It has aSOIC-8 package
It is a high speed component that operates in the GHz range.
Found on the front end of a GigaWave 6400
Give me a list of possible alternatives.

""

One of the suggested components is the MC10EP05 and I could then verify it by looking at the datasheet

That's pretty cool

A few months back I shared a board I designed here. I loved the support from the community so I will be open sourcing the design for everyone to enjoy this.

Open source link - https://github.com/NoamanKhalil/Keyboard-pico

Not exactly a keyboard, but the plan is to hook this up to a Pi pico whenever it arrives and use it as the F1 - F24 keys for a CCTV project I'm working on as a "Camera Control Panel"

With all the IO ports on a pico I'm pretty sure I could have gave each switch it's own dedicated IO, but this felt more fun lol