In an earlier video I showed that a light bulb with two filaments can be used as a diode. In this video I will try if it is also a usable triode with which you can build a tube amplifier. Consider to support this channel on Patreon and get updates about ongoing projects and preview videos! https://www.patreon.com/docvolt or https://paypal.me/docvolt All kind of support is appreciated ... https://www.youtube.com/watch?v=JkrrStcYZLk

The TMS9918 Video Display Processor (VDP) from Texas Instruments was a very popular video chip which was widely used in many home computers and game consoles of the 1980s. See how I put it on a breadboard and connected It with an Arduino to tickle out its 256x192 Pixels and 15 colors. Tools: Camera: https://amzn.to/3kDp1BJ Consider to support this channel on Patreon and get updates about ongoing projects and preview videos! https://www.patreon.com/docvolt Buy me a coffee: https://www.buymeacoffee.com/docvolt Paypal: https://paypal.me/docvolt 0:00 The TMS9918 Video Display Processor (VDP) 1:01 How to interface the VDP with an Arduino 3:33 Text Mode 4:57 Graphic Mode 1 5:24 Graphic Mode 2 6:29 Multicolor Mode 6:52 Sprites ... https://www.youtube.com/watch?v=smgGB_CsXns

See the FPGA implementation of the processor-less Gigatron TTL Computer on the low-cost Tang Nano 9K FPGA board. This video shows how the Gigatron works, how to use it and how I built it on FPGA. Thank you to PCBWay for sponsoring this video. Get PCBs, 3D printing and sheet metal works: https://www.pcbway.com/?from=Doctor%20Volt Consider supporting this channel on Patreon and get updates about ongoing projects and ad-free preview videos! https://www.patreon.com/docvolt Tools: Gowin EDA: https://www.gowinsemi.com/en/support/home/ Repositories: Official: https://github.com/kervinck/gigatron-rom Fork with FPGA implementation: https://github.com/michalin/gigatron-rom/tree/master/Contrib/docvolt Pull request to official repository pending. Items used in this video: Tang Nano FPGA board: https://amzn.to/4dS3QFw Oscilloscope: https://amzn.to/3R48DtM Hot air rework station: https://amzn.to/3yzfSU2 Please use these links for your order to support the channel. It's the same price for you, but I'll get a small commission. 00:00 - Start 00:57 - How it works 03:00 - Bitbanging Video 04:23 - The virtual CPU (vCPU) 05:13 - FPGA 07:00 - Make custom PCB 07:53 - Assembly 09:02 - Shortcomings 09:45 - Adding and removing programs 10:26 - Babelfish ... https://www.youtube.com/watch?v=_SiCv_uo2bY

See how I built a fully functional Z80 computer on a perfboard step by step! (also breadboard would be possible). In this video, I show how to interface static RAM and a serial IO chip, the Z80 DART to the Z80 CPU, and how to write the first simple programs in Assembly language. Support this channel on Patreon and get updates about ongoing projects and preview videos! https://www.patreon.com/docvolt Donations: https://paypal.me/docvolt ... https://www.youtube.com/watch?v=yR566HNj0ao