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Replace leaky Varta 3.6v motherboard backup battery with CR2032, 1n5711 and LM66100
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/Varta_to_CR2032_d81acdb0.html
Design files https://github.com/GadgetReboot/Varta_To_CR2032
LM66100 Ideal Diode https://www.ti.com/lit/ds/symlink/lm66100.pdf
1N5711 low rev leakage diode https://www.mouser.com/datasheet/2/389/1n5711-1848799.pdf
Coin cell reverse charging protection info
https://www.renesas.com/us/en/document/apn/an1535-prevent-reverse-charging-lithium-battery-meet-ul-safety-requirement
https://industrial.panasonic.com/cdbs/www-data/pdf/AAA4000/AAA4000COL15.pdf
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Driving a nixie tube with the HV5222 32 bit shift register high voltage driver
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/HV5222_Breakout_Board_9c5731df.html
Design files https://github.com/GadgetReboot/HV5222_Breakout
Nixie Tube Info https://hackaday.io/project/1940-modular-nixie-display/log/11038-the-in-12a
High Voltage Conductor Spacing https://www.smps.us/pcbtracespacing.html
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USB hot plug experimenting with pogo pins, 5V soft start, and partial power down USB switch
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Conductive Pad Remote Button Repair Kit https://s.click.aliexpress.com/e/_DduXNcv
Screw in hooks/eye bolts https://s.click.aliexpress.com/e/_DDS4gvP
2N4401 2N5088 and other Transistors https://s.click.aliexpress.com/e/_DBEs3Br
Tactile Button 3x6x5mm https://s.click.aliexpress.com/e/_DCoZyev
USB Type C Short Cables https://s.click.aliexpress.com/e/_Dlv2Alf
USB Type C PCB Vertical Socket https://s.click.aliexpress.com/e/_DDb5ck9
USB Type C Breakout PCB https://s.click.aliexpress.com/e/_DBLgJup
USB 2.0 Female to Female Adapter https://s.click.aliexpress.com/e/_DmRnKOD
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Playing with a revised DTMF decoder MT88L70 3.3v power/GPIO, and audio matrix switching.
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PCBs at PCBWay https://www.pcbway.com/project/shareproject/DTMF_Decoder_3_3v_MT88L70_e9c3218d.html
Design files https://github.com/GadgetReboot/DTMF_Decoder_3V3
Using a 3.3v powered DTMF decoder makes it easier to interface directly with ESP32 compared to the 5V version, which requires level shifting.
The ongoing phone line experiments may expand between just two node direct interfacing.
An MT8808 8x8 analog crosspoint switch is being tested to see if phone line audio can be routed between channels. This may enable a central coordinator to manage call requests and phone line routing between multiple nodes, including multi node party line call connections.
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Fuel Tank power supply 1000uF bulging capacitors replaced and
Cheap switching 18v adaptor on a budget guitar pedal supply replaced with a linear regulator.
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Magnetic pogo pin connector auto aligning https://s.click.aliexpress.com/e/_DknAB5L
Panel mount AC voltmeter ammeter https://s.click.aliexpress.com/e/_DdxLxFP
Machined pin socket header strip https://s.click.aliexpress.com/e/_DeDmM1R
Lock washer set https://s.click.aliexpress.com/e/_DEHBqID
IDC Ribbon connector PCB connector https://s.click.aliexpress.com/e/_DkxVNfn
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Experimenting with the PT2399 Echo Processor
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/PT2399_Echo_IC_Breakout_Board_898ef6d4.html
Design files https://github.com/GadgetReboot/PT2399_Breakout
PT2399 Datasheet https://electricdruid.net/datasheets/PT2399.pdf
ElectroSmash PT2399 Info https://www.electrosmash.com/pt2399-analysis
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Breadboarding the MXR Distortion Plus with Ge and Si clipping diodes
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PCBs at PCBWay https://www.pcbway.com/project/shareproject/Op_Amp_Buffer_with_In_Out_Guitar_Jacks_febae3f0.html
Design files https://github.com/GadgetReboot/OpAmp_Buffer
MXR Distortion + Circuit Info
https://www.electrosmash.com/mxr-distortion-plus-analysis
https://www.diystompboxes.com/smfforum/index.php?topic=123107.0
1:37 Distortion and volume pot choices
4:42 Using an input and output buffer for testing
7:16 Circuit overview
10:07 Breadboarded circuit clipping signals on scope
13:19 Guitar test with Ge, Si, and 741 clipping
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Vacuum Tube Octal Socket https://s.click.aliexpress.com/e/_DlXLwuh
Vacuum Tube Octal Base https://s.click.aliexpress.com/e/_DEIdNKv
Hex head screwdriver bit set https://s.click.aliexpress.com/e/_DFfUeJr
Compact Flash to IDE Adapter https://s.click.aliexpress.com/e/_DCn3IFR
4 Pin RGB LEDs https://s.click.aliexpress.com/e/_DmZsDdf
LM13700 Operational Transconductance Amplifier https://s.click.aliexpress.com/e/_DDaB1nF
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A 555, a Binary Counter, and an RC network on a control voltage pin...
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/CD4040_Binary_Counter_Breakout_PCB_3a1d0fc1.html
Design files https://github.com/GadgetReboot/4040_Breakout
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Independent duty cycle and frequency control over the 555 output
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/555_Adjustable_Duty_Cycle_and_Frequency_25da68d1.html
Design files https://github.com/GadgetReboot/555_Oscillator
555 Simulator https://www.falstad.com/circuit/e-555int.html
555 Calculator https://ohmslawcalculator.com/555-astable-calculator
Philips NE555 App Note http://www.sophphx.caltech.edu/Physics_5/Data_sheets/555appnote.pdf
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ESP8684 ESPC2-12 DevKit https://s.click.aliexpress.com/e/_DCLxMV7
TB6600 Microstep Driver https://s.click.aliexpress.com/e/_DDMvxEZ
Wemos D1 Mini V4 https://s.click.aliexpress.com/e/_Dn3mcbP
Raspberry Pi Pico https://s.click.aliexpress.com/e/_DkEFOk1
PCB card edge connectors https://s.click.aliexpress.com/e/_DlEFfZJ
Zener diodes https://s.click.aliexpress.com/e/_DDQJnoV
600:600 Audio transformer SMD https://s.click.aliexpress.com/e/_DkKMFlJ
Bearings https://s.click.aliexpress.com/e/_DCPm1YH
Shaft coupler https://s.click.aliexpress.com/e/_DC34bRF
A4988 Stepper Driver https://s.click.aliexpress.com/e/_DFsPNT3
DRV8825 Stepper Driver https://s.click.aliexpress.com/e/_DDZvs97
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After figuring out where a loud guitar amp hum was coming from, I took a look inside an 18v wall adapter and two different multi rail output power supplies for guitar effects pedals.
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PCF8575 16 ch GPIO expander https://s.click.aliexpress.com/e/_DEMPmiV
SOP/SOIC to DIP adapter pcbs https://s.click.aliexpress.com/e/_DC9ijED
Micro SD Module https://s.click.aliexpress.com/e/_Dnk6scv
SD card case https://s.click.aliexpress.com/e/_Dk356a5
SMD Capacitor kit https://s.click.aliexpress.com/e/_DnOyBLL
TLC272 Dual Op Amp https://s.click.aliexpress.com/e/_DDGxsUh
TLC274 Quad Op Amp https://s.click.aliexpress.com/e/_DEcqFLF
74HC4050 Level Shifting Hex Buffer https://s.click.aliexpress.com/e/_DmWjHPj
ICL7660 Negative Rail Generator https://s.click.aliexpress.com/e/_DkwtU9b
74HC74 D-Flip Flop https://s.click.aliexpress.com/e/_DC7mEFP
CD4066 Quad Analog Switch https://s.click.aliexpress.com/e/_DCxoU8D
CD4051 8:1 Mux/DeMux https://s.click.aliexpress.com/e/_DlBYwwl
CD4017 Decade Counter https://s.click.aliexpress.com/e/_DE4So2V
LM393 Comparator https://s.click.aliexpress.com/e/_DnmxjUV
Sabian Paragon 8 inch splash cymbal
Amazon.com https://amzn.to/3tDElpg
Amazon.ca https://amzn.to/3NLRNhy
Sabian AAX 8 inch splash cymbal
Amazon.com https://amzn.to/41Fyn3A
Amazon.ca https://amzn.to/48ifJ4p
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Using an analog crosspoint switch as a Guitar Effects Loop Switcher
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/16_Channel_Audio_Loop_Switcher_235bc214.html
Design files https://github.com/GadgetReboot/Loop_Switcher
Previous 16 ch experiments https://www.youtube.com/watch?v=FYjVVteUiZY
Foot Switch Controller Project https://www.youtube.com/watch?v=u7d1Ys4eJmQ
Guitar jack breakout PCB used for cables https://www.pcbway.com/project/shareproject/1_4_Phone_Jack_TRS_Breakout_PCB_8e518ade.html
IWS-2820 crimp tool used for the JST pins IWS-2820 JST crimp tool https://s.click.aliexpress.com/e/_DEOAZ6H
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Banggood https://www.banggood.com/custlink/3vKYLANH8N
Aliexpress https://s.click.aliexpress.com/e/_AFeHwB
Amazon.com https://www.amazon.com/?&_encoding=UTF8&tag=gadgetreboo05-20&linkCode=ur2&linkId=952875a3564e2204d1786f94b9e1a8d3&camp=1789&creative=9325
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Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
Read 16 switches and control other devices over RS485
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/16_Switches_to_RS485_Output_Commands_31683848.html
Design files https://github.com/GadgetReboot/RS485_GPIO
If you'd like to support the channel, you can:
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Banggood https://www.banggood.com/custlink/3vKYLANH8N
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Amazon.ca https://www.amazon.ca/?&_encoding=UTF8&tag=gadgetreboot-20&linkCode=ur2&linkId=70fa82315ac48f03342938bd4fb93535&camp=15121&creative=330641
Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
ANYCUBIC PLA 3D Printer Filament
Amazon.com https://amzn.to/3QT6Wyt
Amazon.ca https://amzn.to/47vcd6s
Donner DP-1 Guitar Power Supply
Amazon.com https://amzn.to/3QUrpmp
Amazon.ca https://amzn.to/3uvm6SV
Donner Yellow Fall Analog Delay Pedal
Amazon.com https://amzn.to/46y2RFy
Amazon.ca https://amzn.to/46wjwcK
Amazon Basics Overdrive Pedal
Amazon.com (can’t find but here’s similar) https://amzn.to/3sPSUpm
Amazon.ca https://amzn.to/3uw6crF
Hose Clamp Pliers
Amazon.com https://amzn.to/46y43sw
Amazon.ca https://amzn.to/47PD8JN
ESP32 Development board with display https://s.click.aliexpress.com/e/_DBAu6Cf
MT8816 Analog Crosspoint Switch https://s.click.aliexpress.com/e/_DERK96X
JST XH connectors https://s.click.aliexpress.com/e/_DEiUeKT
Mono ¼” Plug to ⅛” Jack https://s.click.aliexpress.com/e/_De5WXjh
PLCC 44 pin Sockets https://s.click.aliexpress.com/e/_DCNprGL
If you'd like to support the channel, you can:
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Banggood https://www.banggood.com/custlink/3vKYLANH8N
Aliexpress https://s.click.aliexpress.com/e/_AFeHwB
Amazon.com https://www.amazon.com/?&_encoding=UTF8&tag=gadgetreboo05-20&linkCode=ur2&linkId=952875a3564e2204d1786f94b9e1a8d3&camp=1789&creative=9325
Amazon.ca https://www.amazon.ca/?&_encoding=UTF8&tag=gadgetreboot-20&linkCode=ur2&linkId=70fa82315ac48f03342938bd4fb93535&camp=15121&creative=330641
Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
This isolated DMX to logic level adapter makes DMX experiments easy.
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/DMX_RS485_to_TTL_Isolated_Adapter_with_3_pin_XLR_137121b7.html
Design files https://github.com/GadgetReboot/DMX_Interface
If you'd like to support the channel, you can:
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Banggood https://www.banggood.com/custlink/3vKYLANH8N
Aliexpress https://s.click.aliexpress.com/e/_AFeHwB
Amazon.com https://www.amazon.com/?&_encoding=UTF8&tag=gadgetreboo05-20&linkCode=ur2&linkId=952875a3564e2204d1786f94b9e1a8d3&camp=1789&creative=9325
Amazon.ca https://www.amazon.ca/?&_encoding=UTF8&tag=gadgetreboot-20&linkCode=ur2&linkId=70fa82315ac48f03342938bd4fb93535&camp=15121&creative=330641
Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
ADM2483 RS485 isolated https://s.click.aliexpress.com/e/_DD9Zlwn
Magnetic field viewing film https://s.click.aliexpress.com/e/_DlaWPCL
XLR 3 pin connector male and female https://s.click.aliexpress.com/e/_DDE1C3V
Sponge black air filter https://s.click.aliexpress.com/e/_DCEwHAn
If you'd like to support the channel, you can:
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Banggood https://www.banggood.com/custlink/3vKYLANH8N
Aliexpress https://s.click.aliexpress.com/e/_AFeHwB
Amazon.com https://www.amazon.com/?&_encoding=UTF8&tag=gadgetreboo05-20&linkCode=ur2&linkId=952875a3564e2204d1786f94b9e1a8d3&camp=1789&creative=9325
Amazon.ca https://www.amazon.ca/?&_encoding=UTF8&tag=gadgetreboot-20&linkCode=ur2&linkId=70fa82315ac48f03342938bd4fb93535&camp=15121&creative=330641
Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
Re-creating the land line experience and getting old phones and modems running again.
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/Phone_Line_Simulator_POTS_Land_Line_1d34078f.html
Design files https://github.com/GadgetReboot/Phone_SLIM
Playlist of all phone line sim project videos: https://www.youtube.com/playlist?list=PLjJ5BDlAoGarnVThQQigLQh1viLgSvlCM
BBS Documentary 1: https://www.youtube.com/playlist?list=PL7nj3G6Jpv2G6Gp6NvN1kUtQuW8QshBWE
BBS Documentary 2: https://www.youtube.com/playlist?list=PLop3s1hMlSJKXqmuFjK7gbJh2WAyllTTY
Text to ASCII art: https://patorjk.com/software/taag/#p=testall&f=Graffiti&t=Type%20Something%20
ASCII art archive: https://www.asciiart.eu/
Modem AT commands: https://docstore.mik.ua/univercd/cc/td/doc/product/access/acs_serv/5100_sbd/5100ug/74999.htm
Intro bass drop sound effect: https://freesound.org/people/david_werecat/sounds/231660/
Intro metal banging (relay contacts): https://freesound.org/people/freekit/sounds/681563/
If you'd like to support the channel, you can:
Support me on Patreon: https://www.patreon.com/gadgetreboot
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Shop through my affiliate links (I may earn a small commission, costs you nothing)!
Banggood https://www.banggood.com/custlink/3vKYLANH8N
Aliexpress https://s.click.aliexpress.com/e/_AFeHwB
Amazon.com https://www.amazon.com/?&_encoding=UTF8&tag=gadgetreboo05-20&linkCode=ur2&linkId=952875a3564e2204d1786f94b9e1a8d3&camp=1789&creative=9325
Amazon.ca https://www.amazon.ca/?&_encoding=UTF8&tag=gadgetreboot-20&linkCode=ur2&linkId=70fa82315ac48f03342938bd4fb93535&camp=15121&creative=330641
Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
This breakout board allows connecting a power supply and provides convenient multiple outputs, fused by PTCs.
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/Power_Supply_DC_Jack_Screw_Term_0_1_Header_Breakout_with_PTC_13af4976.html
Design files https://github.com/GadgetReboot/Power_Breakout
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Amazon.ca https://www.amazon.ca/?&_encoding=UTF8&tag=gadgetreboot-20&linkCode=ur2&linkId=70fa82315ac48f03342938bd4fb93535&camp=15121&creative=330641
Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
A few example application circuits using MCP41xxx or MCP42xxx series digital pots.
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/MCP42100_Digital_Pot_Breakout_PCB_7d17a85c.html
Design Files https://github.com/GadgetReboot/mcp42100_Breakout/
If you'd like to support the channel, you can:
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Amazon.ca https://www.amazon.ca/?&_encoding=UTF8&tag=gadgetreboot-20&linkCode=ur2&linkId=70fa82315ac48f03342938bd4fb93535&camp=15121&creative=330641
Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
Here's a look at the MCP42100 digital potentiometer, how it works, and how to control it with an Arduino.
There's a couple of practical tests including a DMM resistance measurement of the pot as Arduino changes the wiper position, and an op amp circuit where the digital pot is used to control both the gain and the reference voltage on the op amp. The oscilloscope shows the impact of the digital pot on the waveform.
MCP42100 Datasheet:
http://ww1.microchip.com/downloads/en/DeviceDoc/11195c.pdf
Sketch:
https://github.com/GadgetReboot/MCP42100_Demo
Patreon: https://www.patreon.com/gadgetreboot
The TCA9548A I2C switch / multiplexer allows directing I2C traffic between one main bus and up to 8 other switchable buses. Two main advantages of being able to switch between separate buses are
1. Each bus can operate at a different voltage, allowing level translation between devices that talk to the same master controller
2. Devices that are configured for the same I2C address can't exist on a single bus without conflict but they can co-exist in the same system if they are isolated on separate buses.
Here's a demo project showing how to get the TCA9548A module working with Arduino, using 3 PCF8574 GPIO expanders. 2 of the expanders are configured for the same address so they are wired to 2 separate switch buses in order to interact with Arduino Uno over one main I2C bus.
Sketch and Wiring Diagram
https://github.com/GadgetReboot/TCA9548A
TCA9548A Datasheet
http://www.ti.com/lit/ds/symlink/tca9548a.pdf?ts=1590422159949
Adafruit TCA9548A module
https://learn.adafruit.com/adafruit-tca9548a-1-to-8-i2c-multiplexer-breakout/overview
Patreon: https://www.patreon.com/gadgetreboot
Pinterest: https://www.pinterest.ca/GadgetReboot
Twitter: @GadgetReboot https://twitter.com/gadgetreboot
Just getting initialized to see what this is all about in case the mainstream alternatives go any more dystopian than they already have.