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T-80 Switch Breakout

A quick and simple break-out for SALECOM T-80 switches Includes Simple 2.54mm pin access to all pins 17.7mm x 27.9mm PCBOption to setup for Pull up or Pull down M3 mounting holes at 20.3mm centers 3D Render PCB Layout Schematics Simulations of PU PD...

Binary decoder

https://tinyurl.com/yzwxsgem https://en.wikipedia.org/wiki/Binary_decoder Use in a switch to detect and use the off position https://tinyurl.com/yjy5d5tq Chips SN7404 Hex InvertorSN7414 SN7408 Quad AND gate or SN74138 3-Line To 8-Line Decoders/Demultiplexers Test...

Mobile Phones

Main Phones Motorola D368 1998- Motorola V2088 Motorola L6 Nokia Something Black Phone?? Motorola V3X Apple iPhone 4 Apple iPhone 6 2016 – 2021 Google Pixel 5 2021- Current SIDE PHONES Samsung J5...

Telephone Mini Motor Selector

I found this cool little old telephone selector on ebay, no idea of its age or origin. It looks to have 8 primary to 12 contacts per layer (Common to 0-9,-,N) the 9th layer looks disconnected. It looks to be a quadrant selector with four armatures per layer allowing...

FFMPEG Generate Quindar tones

https://en.wikipedia.org/wiki/Quindar_tones intro tone ffmpeg -f lavfi -i “sine=frequency=2525:duration=0.25:sample_rate=8000” -ab 8k -ac 1 -codec:a pcm_mulaw intro.wav outro tone ffmpeg -f lavfi -i...

FFMPEG Generate Dialtone

ffmpeg -f lavfi -i “sine=frequency=440:duration=5:sample_rate=8000” -f lavfi -i “sine=frequency=350:duration=5:sample_rate=8000” -ab 8k -ac 1 -filter_complex “[0][1]amerge” -codec:a pcm_mulaw dialtone.wav

iPECS Systems Stuff

Serial/Telnet Console Password Management setting or resetting passwords from the serial or telnet console maint> password man 1234 Maint Password changed maint> password usr 1234 User Password changed maint> password adm 1234 Admin Password changed Resetting From...

Telephone Hybrid

https://www.epanorama.net/circuits/teleinterface.html Traditional transformer hybrid circuit https://tinyurl.com/yzw6rao7 https://en.wikipedia.org/wiki/Hybrid_coil https://en.wikipedia.org/wiki/Telephone_hybrid

BioStar MB-1420/25/33PB/PV Repair

I found a 486 board circa 1991 on ebay that was having keyboard issues so I grabbed it not knowing much more than that, When I received it, it seemed to be in really good condition otherwise. It’s a Biostar MB-1420/25/33PB/PV This is a no frills 486 board, no...

Windows Mount ISO Natively

PS E:\Downloads> Mount-DiskImage -ImagePath “E:\Downloads\VeeamBackup&Replication_10.0.1.4854_20200723.iso” Attached : TrueBlockSize : 0DevicePath : \.\CDROM1FileSize : 3965190144ImagePath :...

VMware

Poweron VM from CLI To power on a virtual machine from the command line: List the inventory ID of the virtual machine with the command:vim-cmd vmsvc/getallvms |grep <vm name>Note: The first (leftmost) column of the output shows the vmid. Check the power state of...

Cyclades TS1000

CPU PowerQUIC 1 – XPC855 https://www.wikiwand.com/en/PowerQUICC ROMs http://mirrors.develooper.com/cyclades/cyclades-ts/released/V_1.4.0-3/TS400_800_1000_2000_3000/ zImage_ts_140-3.bin Network DP83846AVHG – DsPHYTER ㅡSingle 10/100 Ethernet Transceiver...

Iridium Satellite Terms

Terms /and Abbreviations Asynchronous A serial data transmission method that uses Start and Stop bits to synchronize reception. AT Commands A group of commands that can be sent by a terminal or host computer to control the ISU in Command mode. Baud One signaling...

VIM

Pasting Blocks of code This prevents auto indent gone wild. :set paste :set nopaste

Emitter-Coupled Logic

http://tinyurl.com/yxkfpm8m http://tinyurl.com/y2po25mw Used in HSSI https://www.allaboutcircuits.com/technical-articles/the-basics-of-emitter-coupled-logic-ECL-inverter-buffer/

IPv6 – Temp disable

Tempoarly Disable and Re-enable Disable sysctl -w net.ipv6.conf.all.disable_ipv6=1sysctl -w net.ipv6.conf.default.disable_ipv6=1 Enable sysctl -w net.ipv6.conf.all.disable_ipv6=0sysctl -w net.ipv6.conf.default.disable_ipv6=0 Permanent Disable Edit /etc/sysctl.conf...

Metal reconditioning

I found a 8 mm hex driver in the trap of my washing machine all rusted, bit of scotch brite in a drill spinning like it was all shiny, then a heat treating for blacking but it killed the magnesium of the head magnate, MAP gas is pretty hot quenched in good ol’...

Creative AWE64

https://retronn.de/hwpics/awe64.txt 1997 Speaking Is MIDI important? I suppose I should answer this question before I review a sound card whose primary strength is its MIDI performance. The answer, simply, is yes. There has been some argument about this; games are...

QEMU

escape key for -nographic Ctrl-A X Disk create disk image qemu-img create -f qcow2 win2k.img 4G convert qcow2 to raw qemu-img convert 32mb.qcow2 32mb.raw mount disk image losetup /dev/loop0 32mb.raw kpartx -a /dev/loop0 mount /dev/mapper/loop0p1 /mnt/32mb convert...

Baby AT Motherboard Drill Pattern

Building a case for an old AT board and I needed a drill pattern for the Baby AT form factor, taking measurements from a real board but found the pattern on the net I completed a design in Kicad and in QCAD babyatDownload BabyAT Reference source...

PCI to ISA bridge chips

AMCCS5920 32-Bit PCI Bus Target InterfaceSchematicsITEPCI-to-ISA Bridge Chip IT8888F Original design for motherboardSchematicsNSPC87200 PCI to ISA Bridge Original design for motherboardSchematicsPLXPCI 9052 PCI Bus TARGET Chip with Glueless ISA...

Creative CT3600 Mods

From a emdded ebay card. Replaced the original CT1978 CQM synthesis chip and its related DAC with a genuine Yamaha YMF289B OPL3 FM synthesis chip and companion YAC516-E DAC, A number of modifications to the FM/AWE filtering, op-amps and capacitors used to improve...