#septandy #lowercasemod On the bench today we have a TRS-80 Model 1 that is having some strange issues. On a recent second channel video, I was doing a quick check-up of the machine and it suddenly started malfunctioning where the video output would go away. In this video, I try to identify the fix the problem and at the same time also do a lower-case text upgrade to the Model 1. Part 0: https://youtu.be/zHe7XwFozk0 Part 1: This part! Part 2: Coming Soon Diagnostic ROM deep dive companion video: https://youtu.be/4fuuyLiSgsE --- Video Links TRS-80 Model 1 (and Model 3) diagnostic ROM: https://github.com/misterblack1/trs80-diagnosticrom 2364 adapter PCB: https://www.pcbway.com/project/shareproject/Adapter_2364___27128__by_Bobbel_.html Frank IZ8DWF's channel: (for really amazing repairs) https://www.youtube.com/c/iz8dwf When good caps go bad: (t-shirt donated by Jesse) https://www.teepublic.com/t-shirt/24171882-when-caps-go-bad Adrian's Digital Basement Merch store: https://my-store-c82bd2-2.creator-spring.com/ Adrian's Digital Basement ][ (Second Channel) https://www.youtube.com/channel/UCbtwi4wK1YXd9AyV_4UcE6g Support the channel on Patreon: https://www.patreon.com/adriansdigitalbasement -- Tools Deoxit D5: https://amzn.to/2VvOKy1 http://store.caig.com/s.nl/it.A/id.1602/.f O-Ring Pick Set: (I use these to lift chips off boards) https://amzn.to/3a9x54J Elenco Electronics LP-560 Logic Probe: https://amzn.to/2VrT5lW Hakko FR301 Desoldering Iron: https://amzn.to/2ye6xC0 Rigol DS1054Z Four Channel Oscilloscope: https://www.rigolna.com/products/digital-oscilloscopes/1000z/ Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier: https://amzn.to/3adRbuy TL866II Plus Chip Tester and EPROM programmer: (The MiniPro) https://amzn.to/2wG4tlP https://www.aliexpress.com/item/33000308958.html TS100 Soldering Iron: https://amzn.to/2K36dJ5 https://www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853 EEVBlog 121GW Multimeter: https://www.eevblog.com/product/121gw/ DSLogic Basic Logic Analyzer: https://amzn.to/2RDSDQw https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672 Magnetic Screw Holder: https://amzn.to/3b8LOhG https://www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html Universal ZIP sockets: (clones, used on my ZIF-64 test machine) https://www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971 RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI) http://www.retrotink.com/ Plato (Clone) Side Cutters: (order five) https://www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184 Heat Sinks: https://www.aliexpress.com/item/32537183709.html Little squeezy bottles: (available elsewhere too) https://amzn.to/3b8LOOI --- Links My GitHub repository: https://github.com/misterblack1?tab=repositories Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group https://www.commodorecomputerclub.com/ --- Instructional videos My video on damage-free chip removal: https://www.youtube.com/watch?v=XQVjwPsVFd8 --- Music Intro music and other tracks by: Nathan Divino @itsnathandivino ... https://www.youtube.com/watch?v=rGhkX6O1lRo

I was given some information about a very unusual way to possibly fix bad chips. Let's try some experiments and see if this actually works to revive some bad Commodore/MOS chips. --- Video Links Controleo3 with Reflow Oven Build Kit https://whizoo.com Toaster Oven: “BLACK+DECKER 4-Slice Toaster Oven, TO1303SB” PAL 128 bad VIC-IIe: https://youtu.be/2AXEfzRr0II Link to Daniel's GAL PLA project https://www.youtube.com/watch?v=GKyoh_gGTYM https://www.freepascal.org/~daniel/c64pla/ Electromigration Blog Post and information: kirchhof.tech/Electromigration.html https://en.wikipedia.org/wiki/Electromigration Time for another Macintosh repair video. This Mac Color Classic has a big problem -- too big perhaps? --- Tools Deoxit D5: https://amzn.to/2VvOKy1 http://store.caig.com/s.nl/it.A/id.1602/.f Jonard Tools EX-2 Chip Extractor: https://amzn.to/2VazxDS https://www.jonard.com/Products/EX-2-DIP-IC-Extractor-24-40-Pins Wiha Chip Lifter: https://amzn.to/3a9ftWw https://www.wihatools.com/precision-chip-lifter O-Ring Pick Set: (I use these to lift chips off boards) https://amzn.to/3a9x54J Elenco Electronics LP-560 Logic Probe: https://amzn.to/2VrT5lW Hakko FR301 Desoldering Iron: https://amzn.to/2ye6xC0 Rigol DS1054Z Four Channel Oscilloscope: https://www.rigolna.com/products/digital-oscilloscopes/1000z/ Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier: https://amzn.to/3adRbuy TL866II Plus Chip Tester and EPROM programmer: (The MiniPro) https://amzn.to/2wG4tlP https://www.aliexpress.com/item/33000308958.html TS100 Soldering Iron: https://amzn.to/2K36dJ5 https://www.ebay.com/itm/TS100-65W-MINI-Digital-OLED-Programmable-Soldering-Iron-Anti-static-Structure/113382669853 EEVBlog 121GW Multimeter: https://www.eevblog.com/product/121gw/ DSLogic Basic Logic Analyzer: https://amzn.to/2RDSDQw https://www.ebay.com/itm/USB-Logic-DSLogic-Basic-Analyzer-16Ch-100MHz-4Ch-400MHz-Xilinx-Spartan-6-FPGA/202543965672 Magnetic Screw Holder: https://amzn.to/3b8LOhG https://www.harborfreight.com/4-inch-magnetic-parts-tray-90566.html Universal ZIP sockets: (clones, used on my ZIF-64 test machine) https://www.ebay.com/itm/14-16-18-20-24-28-32-40-pin-IC-Test-Universal-ZIF-Socket-Fs/303206721971 RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI) http://www.retrotink.com/ Plato (Clone) Side Cutters: (order five) https://www.ebay.com/itm/1-2-5-10PCS-Micro-Scissor-125mm-PLATO-170-Electronics-Cutter-Side-Cutting-Pliers/163458746184 Heat Sinks: https://www.aliexpress.com/item/32537183709.html Little squeezy bottles: (available elsewhere too) https://amzn.to/3b8LOOI --- Links My GitHub repository: https://github.com/misterblack1?tab=repositories Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Grou ... https://www.youtube.com/watch?v=QxeUJbIubHA

I do a shoddy and half-assed teardown of one of these 2015 IKEA LEDARE 600 lumen bulbs. I don't pull the ballast out as for some reason I didn't feel like ruining a perfectly good bulb... But I look at the board construction and thermal management. Construction appears to be decent on this especially considering the price. Will they last? Only time will tell but for the price I paid on sale ($2.25 each) they were really a steal. Using a thermocouple I measured chip temperature at 73C and the metal surface where the circuit board mounts gets to about 49C. What is interesting is the exterior of the bulb (the white part) seems to get hotter than the metal tower the LED board is on. I measured that at 58C. I could verify this by feel as well (before it had heated up to such a high temperature. This is with the dome removed and lamp installed in the IKEA Desk lamp seen in the video. An enclosed lamp would definitely push it to higher temperatures. I was able to identify that each LED has two chips inside. LUX measured: 1230 without the light guide installed (but dome installed) vs 918 as stock. Same exact bulb facing down in my IKEA desk lamp seen in this video or about 32% more LUX output in the downward direction. (In THIS lamp only.) This is a worthwhile mod if this is how you are using this light. Turns it into a much more "spot" style bulb. ... https://www.youtube.com/watch?v=Hx76s6cIGHY

During a recent Amazon sale, I picked up two MicroSD cards. SanDisk Ultra 64gb MicroSD - $23 USD on Amazon as of 18 July, 2016 ($15 on sale when I bought it) SanDisk Extreme 32gb MicroSD - $15 USD on Amazon as of 18 July, 2016 ($29 for 64gb) Using my Thinkpad X250's internal SD card reader I do some benchmarks comparing the performance of these two cards. Note that this is a comparison on my particular machine. Your results may vary from the results I got. Tools used in this video: - ATTO Disk Benchmarks - Crystal DiskMark Shot and edited entirely on my phone. Sorry for the shaky footage. ... https://www.youtube.com/watch?v=3bYBmi5f1Xs