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jgreer613

Retired science teacher, marine chemist, and counselor.

Under the rainbow

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This user joined on 09/10/2015.

My Projects

NC 40A

Things I've Built

Elecraft K2 #155

HF Transceiver

Projects I Like & Follow

Small and simple software for plotting data from serial port

SerialPlot - Realtime Plotting Software

Hasan Yavuz Özderya

Hackaday Prize 2019

Homemade 8MHz Z80 SBC, 128kB banked RAM, RTC, SD (HD emulation), Basic and Forth interpreter, CP/M 2.2 and 3, UCSD Pascal, Fuzix and more...

Z80-MBC2: a 4 ICs homebrew Z80 computer

The 2017 Hackaday Prize

No iron, no cry! Build a mini 4MHz Z80 64kB RAM system with Basic and Forth interpreters, CP/M 2.2, QP/M 2.71, Assembler and C toolchains

A 4$, 4ICs, Z80 homemade computer on breadboard

The 2015 Hackaday Prize

Uses different wavelengths of light to shine through the skin in order to determine the amount of glucose present in the user's blood.

NIRGM - Non-Invasive NIR Glucose Meter

sean-hodgins Sean Hodgins

The 2015 Hackaday Prize

Arduino connects to the TX line (of a router, RPI) and display serial data on smartphone over WiFi

Hardware serial port monitor with WiFi

Ever wanted a meteor detector? Interested in radio telescopes? This project is for you

The tiny radio telescope

paul-scott Paul Scott

The 2015 Hackaday Prize

Rasky is an expansion board for raspberry pi model 2, a collection of software and some 3d models to build an open source KVM over IP

Rasky, raspberry pi 2 KVM over IP

franco-nextime-lanza Franco (nextime) Lanza

The 2018 Hackaday Prize

PDP-11 compatible motherboard in mini-ITX form factor

PDPii

The 2015 Hackaday Prize

Small USB unit which simulates keyboard and generates, keeps and types up to eight passwords

Hardware password manager

voja-antonic Voja Antonic

AVR-based bootloader and IO card for RC2014 retrocomputer

z80ctrl

jb-langston J.B. Langston

The 2015 Hackaday Prize

A home automation box that allows you to connect any device and be controlled by any device and optimizes electricity consumption

Beaglebone Black Home Automation

ansaf-ahmad Ansaf Ahmad

(ab)use the I2S + DMA on the ESP8266 to drive some WS2812(b)'s.

ESP8266 DMA I2S WS2812 Driver

The SlushEngine is an advanced stepper motor driver that works with the Raspberry Pi to move motors with precision, speed, and simplicity.

SlushEngine Stepper Motor Driver

The 2015 Hackaday Prize

A unique moisture meter that can play an integral part in Precision Agriculture and the infiltration of water in Civil Infrastructure.

Optical Soil Moisture Meter

bruce-merlo Bruce Merlo

FreeBSD and the ARM based Beaglebone Black board. Demonstrating a ROV with I/O and video streaming.

FreeBSD Robot + Teensy 3.1

fabio-balzano Fabio Balzano

The 2015 Hackaday Prize

Using an Raspberry Pi connected to a shortwave radio to monitor shortwave activity and produce an alert when there is activity on the radio.

Shortwave Radio Alert

I use the Smart Servo Controller to show how you can easily control two fans with a temperature sensor

Temperature Controlled Fans

mark-arnott Mark Arnott

One of my old projects: circa 2007

Telepresence Robotics Research Platform

robert-guyser Robert Guyser

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