Schmitt Trigger Inverter Oscillator - Fun with Nand Gates and RC Networks
Taking a look at the difference between a normal and a Schmitt trigger logic gate input with scope traces, and how to calculate the frequency of a Schmitt trigger inverter oscillator based on the charge and discharge time of the resistor-capacitor network.
Putting the oscillator to use to generate odd pulse waveforms to blink LEDs in custom patterns and building up toward a sound effect generator, with future projects in mind.
Another Maker is at it again - he sent in even more stuff than he did last year to help me keep projects flowing while many of my things are in storage.
A few classic items, a kit, lots of LEDs (at least 4x4x4 of them), a Mega stash of Arduino stuff, and the usual odds & ends everyone needs to have around.
Visit Another Maker's channels for lots more fun!
https://www.youtube.com/c/AnotherMaker/videos
https://www.youtube.com/c/DevelopWithDan/videos
Support me on Patreon: https://www.patreon.com/gadgetreboot
LBRY/Odysee: https://odysee.com/@GadgetReboot:4
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https://www.youtube.com/watch?v=KIfMZuOJixI
Another bunch of things opened up to reveal parts for future projects and re-stocking, including a watch strap repair kit.
Breadboards
https://www.ebay.ca/itm/Solderless-MB-102-MB102-Breadboard-830-Tie-Point-PCB-BreadBoard-For-Arduino/170884671651?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
https://www.ebay.ca/itm/Mini-Universal-Solderless-Breadboard-400-Contacts-Tie-points-Available-AL/311737682581?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
https://www.ebay.ca/itm/5PCS-White-Solderless-Prototype-Breadboard-170-Tie-points-for-Arduino-Shield/311565588403?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
LED Bargraphs - Different colors available
https://www.ebay.ca/itm/10PCS-10-Segment-Digital-Red-LED-Bar-Graph-Display-Ultra-Bright/182327379649?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Polyester Capacitor Kit
https://www.ebay.ca/itm/150pc-100V-15-Value-0-33nF-470nF-Polyester-Film-Capacitors-Assortment-Kit-W-Box-/292463690737?hash=item441831c3f1
Capacitor Research
http://www.radio-electronics.com/info/data/capacitor/polyester-capacitor.php
Super Capacitor
https://www.ebay.ca/itm/Brand-New-2-7V-10F-Super-capacitor-F-Farad-Super-Ultra-Capacitor-Blue-BIYK-/183262097636?hash=item2aab45b0e4
E-Ink Display
https://www.ebay.ca/itm/Electronic-Ink-Screen-1-54-inch-E-Paper-Electronic-Paper-200x200-SPI-Interface/332461407965?hash=item4d683e7edd:g:z1EAAOSwevlaGOhe
Watch Band Repair Spring Bar Kit
https://www.ebay.ca/itm/360pcs-Watchmaker-Watch-Band-Spring-Bars-Strap-Link-Pins-Steel-Repair-Kit-Tools-/183241920774?hash=item2aaa11d106
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https://www.youtube.com/watch?v=EgrabHYGeps
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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Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
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https://www.youtube.com/watch?v=iS_tpDUXy3c
ESP32 modules are awkward to plug into breadboards, so this pcb makes things simpler.
PCBWay Supports High Precision Advanced PCBs: https://www.pcbway.com/
PCBs at PCBWay https://www.pcbway.com/project/shareproject/ESP32_Dev_Breakout_Board_4de24757.html
Design files https://github.com/GadgetReboot/ESP32_Breakout
ESP32 module/GPIO usage reference https://randomnerdtutorials.com/esp32-pinout-reference-gpios/
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#ElectronicsCreators
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https://www.youtube.com/watch?v=nRSPMgTR3AU
Taking advantage of a few sales, I bought a new overhead LED shop light fixture, a heavy duty hydraulic shop stool, and several part storage tray cabinets.
I haven't had a dedicated work space for electronics in a long time so the test equipment and parts have been all over the house. I decided to finally pick a corner in the basement and start building up a work environment for projects.
Now I can focus on building and experimenting with some projects.
To test out the new work bench, I opened a few eBay shipments including:
Surface mount resistor kit
1K - 1M Potentiometer assortment
Flat Flex Cable connectors (surface mount)
PCB break out boards for flat flex connectors to 0.1 inch through hole
And analyzing some specs of a multi turn potentiometer
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https://www.youtube.com/watch?v=tkU-iIOGp2Y
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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#ElectronicsCreators
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https://www.youtube.com/watch?v=s-NdixIyI5s
Another big electronics mailbag filled with electronic kits, PLC relays, pot knobs, syringe needles, heat sinks, and motor drivers!
Editors note:
14:24 in, “ if you’re doing a stepper motor”
I don’t know why I said that twice, there was no glitch in the matrix.
Magnets Super Strong Round Disc Magnets Rare-Earth Neodymium 50-200pc NEW
https://www.ebay.ca/itm/Magnets-Super-Strong-Round-Disc-Magnets-Rare-Earth-Neodymium-50-200pc-NEW/253529096450?hash=item3b07830102%3Am%3Am7glc1hT7YwUEloCfF0pfAw&var=552718447180
10ML Syringe SMT SMD PCB Solder Paste Adhesive Glue Liquid Dispenser Hot Sale
https://www.ebay.ca/itm/10ML-Syringe-SMT-SMD-PCB-Solder-Paste-Adhesive-Glue-Liquid-Dispenser-Hot-Sale-/192234099524?hash=item2cc20b9344&_uhb=1
10 X Plum Aluminum Cap 180° D-Shaft Half-moon Hole Knobs Guitar AMP Knob Lot
https://www.ebay.ca/itm/10-X-Plum-Aluminum-Cap-180-D-Shaft-Half-moon-Hole-Knobs-Guitar-AMP-Knob-Lot-/263416741251?var&hash=item0&_uhb=1
5PCS 30*34*12MM Triode IC heat sink For TO-220 Aluminum
https://www.ebay.ca/itm/5PCS-30-34-12MM-Triode-IC-heat-sink-For-TO-220-Aluminum/162876732979?hash=item25ec35b633:g:K-kAAOSwYIxX4qa4
5PCS 50M 50.000M 50MHz 50.000MHz OSC Active Crystal Oscillator 0705 7mm×5mm
https://www.ebay.ca/itm/5PCS-50M-50-000M-50MHz-50-000MHz-OSC-Active-Crystal-Oscillator-0705-7mm-5mm/251548087513?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
Metal Detector Electronic DC 3V-5V 60mm Non-contact Sensor Board Module DIY Kit
https://www.ebay.ca/itm/Metal-Detector-Electronic-DC-3V-5V-60mm-Non-contact-Sensor-Board-Module-DIY-Kit/263602662306?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
AT89C2051 Digital 4 Bits Electronic Clock Electronic Production Suite DIY Kit GM
https://www.ebay.ca/itm/AT89C2051-Digital-4-Bits-Electronic-Clock-Electronic-Production-Suite-DIY-Kit-GM/262461793511?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
5V Eight 8 Channel Relay Module With optocoupler For PIC AVR DSP ARM Arduino GM
https://www.ebay.ca/itm/5V-Eight-8-Channel-Relay-Module-With-optocoupler-For-PIC-AVR-DSP-ARM-Arduino-GM/262136732826?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
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https://www.youtube.com/watch?v=0cHUDVituIA
This Kenmore Elite oven had a buzzing noise coming from behind the control panel when the broil element was supposed to be on, and the element wasn't coming on.
Since the element had previously been replaced and tested as working, and the thermostat and all other oven features worked, the control module was removed for troubleshooting.
The issue was a malfunctioning relay so it was replaced and now everything functions normally.
OZ-SS-112LF Relay Datasheet: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=OZ_OZT_series_relay_data_sheet_E&DocType=DS&DocLang=English
ULN2003 Datasheet: https://www.st.com/resource/en/datasheet/uln2001.pdf
Relay Insulation Class info: https://americas.hammondpowersolutions.com/en/resources/faq/definition/what-is-meant-by-class-in-insulation
S-993A Desoldering tool (affiliate link) used to remove the relay
https://www.banggood.com/custlink/GmvyoUfmao
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Videos are mirrored at LBRY/Odysee: https://odysee.com/@GadgetReboot:4
#ElectronicsCreators
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https://www.youtube.com/watch?v=YeSD4MFfKSI
Revisiting the recent situation I had where I couldn't get reliable readings on multiple K type thermocouple meters and probes.
Previous video with Thermocouple woes: https://youtu.be/iZu1cWASU4c
I managed to tear down the low cost eBay thermometer and fix the loose probe socket, in which process I learned about Elastomeric zebra connectors.
I believe I also determined why the Extech meter wasn't reading lower than 6 or 7 degrees C with a -2 degree probe tip.
...
https://www.youtube.com/watch?v=LXKa2EongOE