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Onju Voice - AI assistant replacement to Google Nest Mini by @justLV
kv4p HT v1.7b
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Desktop Neon Effect LED Signs
Tad Boy Color
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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ZIMBABWE
A simple QRP CW transmitter built in less than ten minutes. Only eight components and an output power of around 700mW @ 12V or 500mW @ 9V. The power output depends on the transistor used and also on t...
Ten Minute Transmitter
312
0
1
DX Explorer
DX Explorer
ROMANIA
30
38
SAE PCB Key Rings in striking blue, available in four distinctive variants to suit your preferences. Two of these variants feature a built-in battery, a tactile button, 8 red LEDs, and 8 50-ohm resist...
SAE emblem - Key Ring
463
0
0
Andrei Grosu
Andrei Grosu
ROMANIA
0
6
Vu-meter with multicolored LED dot bar The presented vu-meter is an electronic instrument used to measure the volume of electrical audio frequency signals displayed on a scale of 10 LEDs in ascending ...
Vu-meter with multicolored LED dot bar
2218
0
1
Cristian Pitigoi
Cristian Pitigoi
ROMANIA
47
14
I drew this circuit out of the need to reduce the number of connections to the Arduino platform, it uses 2 shift registers 74HC595 together with 8 current limiting resistors. It can be seen as an alte...
8x8 LED Matrix Circuit using 74HC595
2201
0
1
Cristian Pitigoi
Cristian Pitigoi
ROMANIA
47
14
A sferics receiver is simply receiving radio noise with natural origins, mainly lightning, but also clouds of ions interacting with the earth's magnetic field. Here you have a simple schematic as an i...
K8TND VLF Sferics Receiver - VLF Natural Radio
409
1
1
DX Explorer
DX Explorer
ROMANIA
30
38
The Bias-T ( power / splitter ) required to power the mini whip antenna designed by PZ0RDT for 10kHz to 30MHz. If you want to improve it to resonate better on lower frequencies you could replace C4 wi...
PA0RDT Mini Whip Bias-T
440
0
0
DX Explorer
DX Explorer
ROMANIA
30
38
One of the smallest and simplest transceivers using a single 2N2222 transistor, based on an original design by PY2OHH. Here you have the 40m band version, with an output power of about 700mW. In the v...
Pititico, One Transistor QRP CW Transceiver
1777
0
2
DX Explorer
DX Explorer
ROMANIA
30
38
Sometimes, your ESP based project doesn't need a dedicated USB to TTL chip because you won't upload the firmware so often (especially on custom / embedded projects).In this case you can use a dedicate...
CH340C programmer with Auto-Reset
1312
0
0
Marius M
Marius M
ROMANIA
13
20
Simple 3x3 Macro Keypad, I made some time ago using CherryMX switches, some SK6812 Mini-e RGB LEDs and a small 0.91" OLED display.You can replace switch 1 (S1) with an rotary encoder if you want.Since...
3x3 Macro Keypad
1242
0
1
Marius M
Marius M
ROMANIA
13
20
This is a Christmas decoration for this year when staying at home became the new normal.The pcb has two exposed areas for the windows and on the back of the left side of the window there is a tree sil...
Christmas gingerbread house
1043
0
7
Boogami
Boogami
ROMANIA
1
6
I present a circuit with LED game for beginners, it is made with NE555 and 74hc164; components very easy to obtain. The circuit can be powered by 6-9V; the leds light up one by one from 1 to 8 and the...
LEDs Sequential Turn Light AUDI Style
1746
0
1
Cristian Pitigoi
Cristian Pitigoi
ROMANIA
47
14
I think most of us use a suorce of light when we can`t anything around us, so I present a small circuit and also it can be used for a funny project. I have modified the author`s schematic because I wa...
Fade LED When Dark
801
0
1
Cristian Pitigoi
Cristian Pitigoi
ROMANIA
47
14
Mini whip antenna designed by PZ0RDT for 10kHz to 30MHz. Perfect for LW, MW and SW listening. If you want to improve it to resonate better on lower frequencies you could replace C3 with a 1uF capacito...
PA0RDT Mini Whip Antenna
540
0
0
DX Explorer
DX Explorer
ROMANIA
30
38
Monitor for equal voltage at the terminals of two 12V batteries.Circuit presentation Most 24V back-up power systems, such as fireplaces, etc., use two 12V batteries. The charging system of the voltage...
Monitor for 12V batteries
893
0
0
Cristian Pitigoi
Cristian Pitigoi
ROMANIA
47
14
Hi designers!This is a simple circuit for monitoring the voltage of a battery, requires few components and easy to purchase. You can use linear mode or voltage level per led. The adjustment of this as...
Battery Voltage Monitor with LM3914
1519
3
3
Cristian Pitigoi
Cristian Pitigoi
ROMANIA
47
14
Hello !On the internet we can find many schemes very similar to this one. This circuit is made for a DIY builder, I left enough room for a heat sink. for the filter capacitor; I used 4 rectifier diode...
Small Power Supply with LM317
1012
0
1
Cristian Pitigoi
Cristian Pitigoi
ROMANIA
47
14
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