I bought a bunch of Z80 parts on ebay for cheap ($10 plus shipping). The parts came on a PCB which had not yet been flow soldered. From the date codes of the parts it looks like it was stuffed sometime around 1999. All I had to do was straighten...
ED (Electronic Discovery) is specifically designed to engage a family with a friendly faced gadget which is easy to assemble, write code for and encourages them to interact. Ideally this makes electronics a family hobby rather than something Dad does...
Background Earlier this year, we designed and built a robust, IoT self-watering plant system (Project Eden) that I installed in my home garden. Having a background in water process engineering, I aspired to develop a solution aimed at water conservation...
The 16C2552 doesn't need a lot of glue on the RC2014 side. A single 74HCT138 is used to decode the I/O space and allow the card to be placed at 80/90/A0/B0/etc with the second port 8 bytes above. The standard configuration used on non Z80 ports is to...
This is the output you will get from the from the Yagi Calculator. These measurements are only valid for a 3/4 in (19 mm) boom and 1/4 in (6.35 mm) elements. VK5DJ's YAGI CALCULATORYagi design frequency =725.00 MHzWavelength = 414 mmParasitic elements...
Counting the GPIOs... With the intention of using the Raspberry Pico micro controller, I needed to understand how many GPIOs would be required to carry all of the necessary signals: 16 X Address Lines8 X Data LinesMREQ signalWR signalRD signal....
Background If you have been following Hackaday for a while, you will have seen on numerous occasions the KENBAK-1, regarded by many as the first commercial personal computer. Ten years ago Mark Wilson introduced KENBAK-uino, a reproduction...
The JP-QR701 specifications indicate that it has GB2312 support. I think this also applies to similar products that all seem to come from the same OEM or at least from the same design. Most documentation - especially that found on English-language distributors...
Hardware:- The necessary components for the MSP430 to be operational are quite simple: only a CR2032 battery for power, two decoupling capacitors, a pull-up resistance on the RST pin. Note some pins connected to TX, TEST, RST and GND have been soldered...
I plan on using this bus as the backplane for supporting R&D for my Kestrel Computer Project. Signals are as follows:SYSCON Signals.50MHZ. A 50MHz reference clock generated by the backplane. NOTE: This doesn't mean that the bus has to run at 50MHz; you're...
Parts Bought the following parts: 2x NEMA 17 stepper motor - 68 oz in (400 steps/rev)1x Pololu universal aluminum mounting hub for 5mm shaft M3 holes (2 Pack)2x NEMA 17 stepper motor mounting bracket1x Nano 3.0 CNC board (uses A4988 stepper motor drivers)1x...
More and more projects around desktop robotic arms have emerged but nothing really accessible and complete for us. That's why we are developing "Niryo One", using all the technologies in a 3D printer (Ramps, Stepper motors, ...) but with a huge improvement...
Arduino IDE is simple!There are many development platforms for ESP32 (ESP-WROOM-32). In some situations, using Linux or cygwin in Windows are quite intimidating for beginners. Using Arduino IDE is a more user-friendly approach.1. Add The Board URL to...
Revision one will be all breadboarded. -- Basic code for player's times and reset. Revision two will use dedicated Arduino board. -- Simple case -- Add additional chess timing methods. Revision three will be PCB'ed properly. -- Custom case and switches....
We're doing a Zero to Product PCB design workshop on June 19th onsite at Maker Camp...in a shipping container!Location: Maker Faire Shenzhen (Software Industrial Base, Nanshan District) AND we're having a party on Saturday night June 20th to celebrate...