Apple II

ISO01 – Compact low voltage isolated power supply

May 4, 2020 GGLABS

Project Status: work in progress While working in the lab it’s often useful to have a small isolated power supply handy. Depending on the circuit configuration, ISO01 can generate galvanically isolated unipolar and symmetric voltages from a single 3.3V or 5V rail. The circuit is based on the Texas Instruments SN6501 …

Apple II

GRAD – Micropower Geiger-Müller Counter Arduino Shield

April 7, 2020 GGLABS

Project Status: work in progressLike many other hobbyist we have always been fascinated by radioactivity and the sensors to detect it. Geiger-Müller tubes are a common and relatively inexpensive way to measure radiation. GRAD is a complete solution for radiation counting in an Arduino shield form factor. Its main features are …

GGLABS
Apple II

GZ/80-B00 – 20MHz Z-80 PCPI compatible Apple CP/M card

April 2, 2020 GGLABS

Project Status: work in progressThe PCPI Appli-Card was the first single board computer style CP/M card for the apple II. It featured a 6MHz Z-80 CPU paired with 64KB of RAM and 2KB of ROM. Thanks to the high clock and zero wait states DRAM accesses the card performed almost 3 …

Apple II

UJOY/1A – USB interface for Atari Joysticks

February 28, 2020 GGLABS

Project Status: releasedReal Atari 2600 Joysticks are necessary for a truly authentic feel when using an emulator. The UJOY interface allows to connect one Atari Joystick to a standard USB port. The Atari joystick is a very simple device. Just 5 switches directly connected to a female DB9 connector. We used …

Apple II

GS2HD – Apple IIgs RGB to HDTV Component Adapter

January 8, 2020 GGLABS

Project Status: releasedThe apple IIgs, like many computers from the 80’s and early 90’s, has a analog RGB output at a 15KHz horizontal frequency (same as NTSC/PAL). The majority of modern monitors and TVs will not sync to anything below 31.5KHz on their VGA input. If you have a TV with …

Apple II

Happy 2020!

December 31, 2019 GGLABS

As 2019 is about to end, our staff would like to wish all our customers, friends and suppliers a happy new year. We are very thankful for all the support we received so far and hope to continue in 2020. In 2019 we shipped our products to 46 different countries. …

Apple II

GGLABS Terminal V0.18

December 30, 2019 GGLABS

GTERM is a newly developed VT100 terminal emulator for the Commodore 64. GTERM supports the GLINK232T/Turbo232 and the GLINK232/swiftlink UART cartridges. It features a custom monochrome software 80 columns display and supports serial speeds up to 115200 bauds on a stock c64. Design Goals Support for the GGLABS GLINK232 …

Apple II

GGLABS Terminal V0.12a

December 17, 2019 GGLABS

GTERM is a newly developed VT100 terminal emulator for the Commodore 64. GTERM supports the GLINK232/swiftlink and the GLINK232T/Turbo232 UART cartridges. It features a custom monochrome software 80 columns display and supports serial speeds up to 115200 bauds on a stock c64. Design Goals Support for the GGLABS GLINK232 …