Shared Projects

UBMP4.2 is a simple, versatile, and inexpensive microcontroller development system for anyone.

UBMP4.2 was designed for learning or teaching PICmicro programming in C using either Microchip’s MPLAB X IDE or the cloud-based MPLAB Xpress IDE. Its USB bootloader allows UBMP4.2 to be programmed using almost any device – including Chromebooks!

UBMP4.2Hardware Features

• Microchip PIC16F1459 USB-capable microcontroller with 8k words of program FLASH (6k words free when using the USB bootloader), 128B of user FLASH, 1kB of RAM, 10-bit ADC, and a built-in temperature sensor
• 5 built-in pushbuttons
• 5 visible light LEDs
• 1 piezo beeper output
• optional 8-pin header for PORTC I/O pin expansion (great for servos, a SONAR module, NeoPixels, an LCD display, etc.)
• optional IR LED output for remote control transmitter applications (or a high-current transistor-driven output)
• optional IR demodulator for remote control decoding
• optional IR phototransistor or visible-light ambient light sensor for light sensing
• USB 2.0 type-C port for power and programming
• 6-pin ICSP (In-Circuit Serial Programming) header for PICkit-4

Go to mirobo.tech/ubmp4 for more information.

Relay bypass for guitar effects pedals using momentary spst switch and 555 timer.

Eurorack audio output module - main PCB rev 1.3

Design files here: https://github.com/Len42/Synth/tree/main/modules/Audiout

Eurorack audio output module - controls PCB rev 1.3

Design files here: https://github.com/Len42/Synth/tree/main/modules/Audiout

Eurorack audio output module - panel PCB rev 1.3

Holes only. No pads, no tracks.

Design files here: https://github.com/Len42/Synth/tree/main/modules/Audiout

new qt py backpack

USB-2 Micro-B to Isolated TTL serial 4 pin header, using a UMFT234XF FTDI module. Version 2.2

https://www.barbouri.com/2022/03/31/isolated-ttl-serial-to-usb-2-0-converter/

Assembled Isolated TTL serial to USB board

Omega2S breakout/programmer board using “FlexyPin” for solder-free connection of castellated Omega2S module. Includes ethernet interface (for high-level programming), separated VDD (low level SPI programming) FTDI header for console, simple 5V to 3.3V PSU.

Adapter to plug a jtag probe into a Huawei Hi3861 module. Details at hi3861 jtag-adapter

Programmable Voltage Reference 0.001 to 5.000 Volt - Version 3.15 UNTESTED

The Programmable Voltage Reference (PVR) has a range of 1 mV to 5.000 volts in 1 mV steps. The accuracy is plus or minus 50 uV for any set value. The reference value is displayed on a 2 X 16 character OLED display and can be set manually using the rotary encoder, toggle switch, or remotely over the TTL serial to isolated USB 2.0 port.

https://www.barbouri.com/2022/03/29/updating-the-programmable-voltage-reference-project/ Front panel with display view

Programmable Voltage Reference 0.001 to 5.000 Volt - Version 3.14

The Programmable Voltage Reference (PVR) has a range of 1 mV to 5.000 volts in 1 mV steps. The accuracy is plus or minus 50 uV for any set value. The reference value is displayed on a 2 X 16 character OLED display and can be set manually using the rotary encoder, toggle switch, or remotely over the TTL serial to isolated USB 2.0 port.

https://www.barbouri.com/2022/03/29/updating-the-programmable-voltage-reference-project/ Front panel with display view Circuit board “After Dark” service, top view

A combination Waveform Generator and Modulator. Triangle and Pulse waveforms are used to distort a mix of unipolar audio inputs using a unique kind of modulation. PDF description at https://jtalbert.xyz/Other/

https://github.com/ServError/Thrustmaster_Warthog_Throttle_Alps_Slew_Mod

Designed to connect an ESP32 DevKit to the ES8388 PCB_Artists Audio Codec Module. It also includes a MIDI Input and Output interface and a convenient set of pads and headers for attaching external controllers and sensors to available ESP pins.

With a complete Codec Effects Software package for the ESP32. Includes full documentation PDF at https://jtalbert.xyz/ESP32/

PyPen M4 with SAM D51

LC Meter based on Neil Hecht’s AADE LC Meter. The W8BH LC Meter uses an ATmega328P-PU which can be programmed in the Arduino IDE. Builder’s Guide, schematic, and Gerbers available at: http://w8bh.net/

Added APDS9253 RGB light sensor, HDC2010 humidity/temperature sensor, and LPS22HB barometer for environmental data logger using native 3 MB SPIFFS. Deep sleep current < 10 uA.

Carries four SPI flash chips pinned out according to microSD SPI pinout.

Make sure you order at 0.8mm thickness, otherwise it won’t fit the microSD slot.

BOM:
- 8x 10kΩ 0805 resistors (Digi-Key)
- 4x 0.1µF 0805 capacitors (Digi-Key)
- 4x MX25L3233FMxI 32Mbit SPI NOR flash (either 150mil or 200mil acceptable) (Digi-Key)

Board is not marked; the capacitor can be identified as connected to a ground plane on one side.