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Electronics

Created a High-Loudness ECM Microphone Amplifier that Operates on Phantom Power

I made a microphone amplifier that can run on phantom power and can handle high volume. Circuit Circuit diagram ...
Electronics

Using PCF2129, a real-time clock IC, with ESP32

PCF2129 Operates at 3.3V The PCF2129 is a real-time clock IC that can run at 3.3V, and is connected to the micro...
Electronics

Displaying a single digit number with the beautiful and transparent VFD display tube IV-27M

This time I would like to control the IV-27M with ESP32 and display the numbers. Here is the previous experimental a...
Electronics

VFD display tube IV-6 and MM5316N with clock source added to become a clock

In this article, I would like to add a clock source to the previous circuit to make it a VFD clock. The previous ...
Electronics

I made a ring oscillator using transistors

I made a ring oscillator circuit with transistors, where the LEDs light up in sequence. Ring oscillator If you con...
Electronics

Making a clock using VFD display tube IV-6 and MM5316N

I'm going to make a watch out of an IV-6 that I bartered with a retro display tube enthusiast in Ukraine. ...
Electronics

Revenge of buck-boost DCDC converter circuit to operate ESP32 with two batteries

In the previous circuit, when the ESP32 tried to connect to WiFi, the voltage dropped and the ESP32 rebooted. This tim...
Electronics

Make a circuit using CH340C for ESP32 writing (success).

The circuit I made the other day could not recognize CH340K on my computer, so I used CH340C to make the circuit. ...
Electronics

Make a circuit using CH340K for ESP32 writing (failed).

In order to write the ESP32 from the Arduino IDE, a USB serial conversion IC is required. This time I would like to ...
Electronics

Designed a power supply circuit to operate the ESP32 with two batteries (actually, I did not design it)

I want an ESP32-DevKitC that runs on batteries ESP32-DevkitC is a board that allows you to use ESP32 easily. ESP32-De...
Electronics

Until the K155ID1 is controlled by the ESP 32 and the 2 digit Nixie tube IN - 12B is dynamically lit.

I have the substrate for the nixie tube and the K1551 ID 1 for the control IC, I want to control the nixie tube usin...
Electronics

The Nintendo Famicom has been remodeled into a clear video and a nice stereo output.

The sharp video output and audio stereo function of the Nintendo Famicom Video Console, which we have been experimenti...
Electronics

I make a UV-EPROM writer

I want to make my own cassette for the Famicom, so I am making various preparations. Last time, I was experimenting wi...
Electronics

Circuit diagram of Nintendo Famicom cassette sucker kazzo clone

。Here is a schematic of a previously created kazzo clone. It is basically the same as kazzo_pcb_2 of kazzo0.1.3. The c...
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