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Projects Johan Carlsson likes and follows

139.2k
2.4k
629
IP over 430MHz Ham Radio, 50 to 500kbps, 20W RF. Extension for HSMM-Hamnet-AREDN. 100% open-source.
Project Owner Contributor

NPR New Packet Radio

f4hdkf4hdk

1.1k
880
10
WART may be the the worst sounding audio playback systems ever created. But it's six lines of code and works on the tiniest processors.
Project Owner Contributor

WART: (really) cheap audio playback

r-d-poorR. D. Poor

21.2k
138
106
A 3D printable, MEMs based microphone is proposed in this project. The microphone is laboratory grade, IEPE powered, and less than $30.
Project Owner Contributor

MEMs Based IEPE Powered Instrumentation Microphone

peter-riccardiPeter Riccardi

15.4k
93
79
Transmit radio signals using just a serial port? You bet!
Project Owner Contributor

Serial Port SDR

ted-yapoTed Yapo

20.2k
65
61
A modern DC/DC converter design capable of delivering current in excess of 40mA at 170V
Project Owner Contributor

High Voltage Nixie Power Supply

tonyTony

8.4k
64
22
How to make a very simple single tube amplifier that also works at low voltage and is powered by 12V DC.
Project Owner Contributor

DIY Simple PCL82 Low Voltage (12V) Tube Amplifier

mircemkmircemk

8.2k
54
20
We will use the E32 LoRa module. E32 is a 1 Watt LoRa high power module and we will also take a look at its breakout board.
Project Owner Contributor

E32-433T LoRa module Tutorial | DIY breakout board

akarshagarwal98akarshagarwal98

9.3k
43
42
A custom build of a valve amplifier using two 6AK5/EF95 valves, 4S battery pack with protection, charging module and battery level indicator
Project Owner Contributor

Battery Operated Hybrid EF95 Valve Amplifier

ratti3Ratti3

20.5k
31
23
Playing vacuum tube is not so difficult as expected. Let's play great heritage of human being by modern technology!
Project Owner Contributor

Vacuum tube game in 21st century

microwavemontmicrowavemont

8.2k
29
22
A single-ended tube stereo amplifier with a modern technology twist
Project Owner Contributor

Keritech "Little Red Devil" Single-Ended EL84 Amp

keri-szafirKeri Szafir

8.8k
27
19
How an Attiny85 self-regulates its cheap power supply.
Project Owner Contributor

A Cheap And Dangerous Garden Light Boost Converter

randy-elwinRandy Elwin

3.2k
24
23
Have a close look at how Electrical Discharge Machining (EDM) works and what can be achieved with a simple setup
Project Owner Contributor

Spark erosion: Detailed view, simple machinery

norbert-heinzNorbert Heinz

2.8k
23
20
A home brew mini-synth idea using no transistors with the Patrick Oscillator
Project Owner Contributor

Transistorless Sound Synthesizer

dr-cockroachDr. Cockroach

3.9k
21
21
How to make a Geophone sensor yourself for free from parts that can be found in any workshop.
Project Owner Contributor

DIY Extremly Sensitive and cheap Geophone sensor

mircemkmircemk

7.5k
18
11
Building my first tube amplifier, on a tight budget.
Project Owner Contributor

Dirt Cheap Tube Guitar Amp Build

electroidiot_electroidiot

2.6k
17
10
Blueprints for network alternative navigation tools.
Project Owner Contributor

Aweigh

aweighaweigh

5.6k
16
17
An interesting project that describes how to make several useful devices using a CFL bulb ballast, with minimal modification.
Project Owner Contributor

Induction Heater and HV source from CFL Bulb

mircemkmircemk

4.4k
16
15
This projectdescribes the making of an unusual tweeter speaker that is much appreciated in the high-end audio class.
Project Owner Contributor

DIY Plasma Tweeter (speaker)

mircemkmircemk

3.5k
16
38
Musical instrument without batteries!, created with the motor of a PC CD player and a piano generated with the incredible 555
Project Owner Contributor

Acordeonador

bernaBerna

4.3k
12
12
Hacking the "I can solder" pin with a fancy steampunkish neon bulb lamp and a high voltage joule thief
Project Owner Contributor

I can hack – Pin

suedbunkersuedbunker

6k
11
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This project re-purposes a cable as a voltage boosting device
Project Owner Contributor

Boosting voltage with a cable

craig-dCraig D

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