Reddit:Electronics

Its using ECC83/12AX7A/5751WA Tubes which require 6.3V at 0.6A for heating. This Op-Amp requires +300V and -300V on its rails and has an output voltage swing of +50V to -50V. Its input offset voltage is 2.4V for it to detect a difference.

Here its wired up as an inverting amplifier with a gain of 10. Both probe leads are x10 probes, top channel is the output (5V/div -> 50V/div) and the bottom is the input (0.5V/div -> 5V/div) So I get a gain of 10 and it inverts, just as expected.

Photo 1 (from top to bottom) 1. Synchronometer Ch7-15 (Ч7-15). Used as reference clock source for all other devices that have option of external reference clock, as normal clock and other stuff as needed. 2. Programmable frequency synthesizer G4-164 (Г4-164) 0.1 - 640 MHz; AM, FM, PCM; high stability (1 * 10-11 Allan deviation). 3. Frequency counter Ch3-54 (Ч3-54) with time intervals module installed

Photo 2 (from top to bottom) 1. Programmable frequency counter RCh3-07-0001 (РЧ3-07-0001). Probably the rarest and most unique device in my collection. See my other post for more photos and description. 2. Low frequency high power generator G3-123 (Г3-123) 1 Hz - 300 kHz Max output power of 90 W.

Photo 3 (left to right, top to bottom) 1. RMS voltmeter V3-56 (В3-56) Up to 15 MHz. 2. Tube portable multimeter V7-15 (В7-15). The oldest device in my collection. Has the unique ability to measure voltages up to 100 V in GHz range. 3. Wide band generator G4-154 (Г4-154) 7 Hz - 10 MHz; Max output power 10 W.

Photo 4 (top to bottom) 1. Portable oscilloscope S1-73 (С1-73) 10 MHz, has detachable 24 V power supply, light and compact (for analog scope). 2. RLC meter E7-15 (Е7-15). Light and compact, has 4 wire measurement scheme and high range.

Photo 5 (top to bottom) 1. Power supply B5-31 (Б5-31). Semi linear, 0 - 100 V, 0.1 A 2. Power supply TES-88-2.5 (ТЕС-88-2.5). Linear. 0 - 35 V, 2.5 A 3. Power supply B5-50 (Б5-50). PWM, 0 - 300 V, 0.3 A

Photo 6 1. Lab clock Ch7-3 (Ч7-3). Mainly used as counter or stopwatch.

Before you all come attack me, I'm just a highschool student trying something out. Over the past summer, I've been working hard to develop a weather station with the MQ135, MQ7, MQ2, MQ4, BME680, SIM800C, ESP32C3 and LIS3MDLTR (magnetometer). Entirely powered by solar power and with a 2500mAh battery, and a OLED display as a gimmick. A lot to process, I know. I've made a prototype (not fully working) and it seems like a good concept. Planning to use InfluxDB for sending the data with SIM to a server and then graphing it with another software (somehow). All I wanted to know is if it seems as if it seems like a valuable product which other people would purchase, especially for industrial applications, or am I just throwing money into a fire? If you have any questions on this, then please let me know below, and I've also attached some pictures of the EasyEDA 3D models. Thank you for your help.

https://preview.redd.it/jtyht9349eud1.png?width=1200&format=png&auto=webp&s=eae35252b3fa2cbedc1093854e98c6dd6d333b03

https://preview.redd.it/9oxjo9349eud1.png?width=1084&format=png&auto=webp&s=b0d05275e24e71f69490ff57695d627c9fdd2aad

https://preview.redd.it/mkwh59349eud1.png?width=1194&format=png&auto=webp&s=f228ac90f96cd9c008cbaaca316e1865900c37a5

This is a circuit for an 8 bit Analog to Digital Converter. I will try something more complex next week maybe.

Needed one 1mfd ceramic. I looked on Amazon and could get a whole set for a few bucks more. Got this. I hoped they got scrambled in shipping, but no.

Repairing the road on a laptop adapters PCB. It seems like client tried to repair the adapter himself and messed up the road.

AI isn’t ready for prime time yet i guess…

Did not have brass so had to make it out of steel wire

Finished wiring up this behemoth of a project yesterday and wanted to share some shots of the final product. It’s based on an Altec 1567a mixer but with some improvements. I added some FET buffered direct outputs on each channel, phase invert switches, output attenuation, and grid stoppers on the high impedance inputs.

Over the last few years I have designed a kit set computer called “Alius 6502”

The base design is a 1Mhz system, but I had had it run stable at 4Mhz.

Some people will see that it has used the KIM-1 as inspiration, a hex keypad and a seven segment display.

The design was to be aligned with what would have been available in 1979. The Kailh keys are modern, and the SDcard interface is modern.

32k of RAM, 16k of ROM, FAT32 support.

This is aimed at students, I have had a group of teenagers make the kit over two days.

The whole project is open source, hardware, software and documentation. Feel free to help me make it better.

https://www.asinine-labs.org

The TPA broke inside of the connector, apparently the pin recessed after plugging in to the tester.