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Onju Voice - AI assistant replacement to Google Nest Mini by @justLV
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DIY Mechanical Macro Keypad ― Ocreeb
SIDKick pico 0.2 DAC (SID 6581/8580-replacement for C64/C128)
SlimeVR Hyperion BMI160 PCB
Sputnik Regenerative Receiver - SSB, CW, AM, FM
MicroDexed-Touch (depreciated)
Frog Boy Color
Low Cost Drone using ESP32
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Onju Voice - AI assistant replacement to Google Nest Mini by @justLV
kv4p HT v1.7b
SIDKick pico 0.2 (SID 6581/8580-replacement for C64/C128)
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Decade Resistor Box built with cost-effective 11-position rotary switches, making it an affordable yet versatile tool for your electronics projects. This design includes 3D print files for the enclosu...
Decade Resistor Box using inexpensive 11-position rotary switches, and 3D printed enclosure.
115
0
0
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
Allows for switched switchable attenuation steps and impedance matching of the signal generator signal.
75 to 300 Ohm L-Pad with switched attenuator.
2687
3
5
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
This PCB is the perfect solution to replace the selenium rectifier in vintage tube radios with modern silicon diodes, while maintaining the proper voltage drop. Since silicon diodes have a lower volta...
Bridge Rectifier with Mosfet Voltage Dropper 2024-09-02
840
1
4
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
A power supply board for adding a bluetooth module to a tube radio, with signal boost to raise the audio level.
Supply board for tube radio bluetooth module with signal booster.
3308
2
14
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
A convenient supply and I/O board for adding a bluetooth module to a tube radio. The bluetooth modules are readily available, so this board serves to provide the required DC supply to the board using ...
Power Supply Board for Bluetooth module on tube radio
1862
0
7
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
The SMD version of my Tube Radio Bluetooth Module boardsThe definitive Bluetooth Module PCB to seamlessly add BT to a tube radio, with no buzzing noise, and signal booster. It also incorporates the ma...
SMD version - Bluetooth Module Supply and Booster board for tube radio
282
3
1
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
A DIY Tube Tester needs a lot of different power supplies to allow you to really test tubes correctly. You can set up these supplies independently, but a better solution is to build a single board tha...
Full supply board for DIY Tube Tester
4361
1
9
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
The definitive Bluetooth Module PCB to seamlessly add BT to a tube radio, with no buzzing noise, and signal booster.The board takes power from the radio's heater supply, and provides power to a commer...
Tube Radio Bluetooth Module boards
671
2
2
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
Magic Eye Switch for Bluetooth BoardsThis is an add-on to allow the Bluetooth Boards that I designed previously to be switched on or off using the magic Eye tube's B+ signal. The Magic Eye is normally...
Magic Eye Switch for Bluetooth Boards
281
0
2
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
An RF demodulator probe is a valuable tool for repairing radios and other RF gear. Equally, an audio signal tracer is great for repairing audio gear. What if we could have both functions in one tester...
A high impedance active RF/AF probe with amplifier.
6117
0
16
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
I recently converted the dial lamps on a Sony CRF-320 receiver to LED's, and the effect was wonderful. The dial lamps were very dim, and finding suitable replacements is becoming difficult. LEDs also ...
Dial lamp to LED conversion boards
580
0
2
Manuel Caldeira
Manuel Caldeira
PORTUGAL
216
3
