updated 6 months ago
#1815 Tunnel Diode AI301G (part 1 of 3)
IMSAI Guy 2024-03-27 | Episode 1815 chip of the day
lets play with a tunnel diode and make some graphs
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#1856 BS170 Measurement by Hand
IMSAI Guy 2024-05-07 | Episode 1856
graphing the threshold voltage
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#1855 BSS138 Logic Level Translation
IMSAI Guy 2024-05-06 | Episode 1855 chip of the day
don't use 2N7002 or BS170 for level translation
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#1854 Temp Controller Teardown
IMSAI Guy 2024-05-05 | Episode 1854
just a look inside
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#1853 Free Oscilloscope Probe Attachment
IMSAI Guy 2024-05-04 | Episode 1853
make one today
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#1852 OmniBot (part 9 of )
IMSAI Guy 2024-05-03 | Episode 1852
a look at the old remote
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#1851 Linear Optocoupler (part 3 of 3)
IMSAI Guy 2024-05-02 | Episode 1851
It works and you too can get one:
pcbway.com/project/shareproject/Linear_Optocoupler_160f2e4f.html
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#1850 Linear Optocoupler (part 2 of 3)
IMSAI Guy 2024-05-01 | Episode 1850
I layout a board:
pcbway.com/project/shareproject/Linear_Optocoupler_160f2e4f.html
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#1849 Linear Optocoupler (part 1 of 3)
IMSAI Guy 2024-04-30 | Episode 1849
can you make the transfer curve of an optocoupler linear?
docs.broadcom.com/doc/HCNR200-HCNR201-High-Linearity-Analog-Optocouplers-DS
docs.broadcom.com/doc/AV00-0291EN
vishay.com/docs/83708/appnote50.pdf
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#1848 OmniBot (part 8 of )
IMSAI Guy 2024-04-29 | Episode 1848
new brain for the robot
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#1847 Elecrow 4.3 esp32 Display Module
IMSAI Guy 2024-04-28 | Episode 1847
sent into the channel for review
It might be a good fit for my robot
CrowPanel ESP32 display: elecrow.com/display/esp-hmi-display.html?idd=5
CrowPanel ESP32 4.3'' display: elecrow.com/esp32-display-4-3-inch-hmi-display-rgb-tft-lcd-touch-screen.html?idd=5
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#1846 OmniBot (part 7 of )
IMSAI Guy 2024-04-27 | Episode 1846
Omnibot is moving with remote control
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#1845 OmniBot (part 6 of ) L298 H-Bridge
IMSAI Guy 2024-04-26 | Episode 1845 chip of the day
I add motor control to the robot using off the shelf L298 modules and esp32
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#1844 OmniBot (part 5 of )
IMSAI Guy 2024-04-25 | Episode 1844
OmniBot Controller Development
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#1843 OmniBot (part 4 of )
IMSAI Guy 2024-04-24 | Episode 1843
I decided to use the ESP-NOW wireless interface.
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#1842 OmniBot (part 3 of )
IMSAI Guy 2024-04-23 | Episode 1842
use old brains?
Crowbot: youtu.be/OgCZ1Togmt4?si=_OPINNJc1rqN01At
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0:00 Begin
1:22 the brains inside
3:10 MSM4611A 4 bit
5:33 ImsaiDog checks it out
5:50 recycle existing robot
#1841 OmniBot (part 2 of )
IMSAI Guy 2024-04-22 | Episode 1841
crack it open and look inside
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#1840 OmniBot (part 1 of )
IMSAI Guy 2024-04-21 | Episode 1840
time to renovate an old friend
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#1839 Radio Shack Electronic Project Kit
IMSAI Guy 2024-04-20 | Episode 1839
200 in 1 projects for the budding EE
zpag.net/Electroniques/Kit/200_manual.pdf
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IMSAI Guy 2024-04-19 | Episode 1838
sent into the channel for review
8 bands frequencies, including FM/AM (✈aviation band receiving). AM: 108-136MHz Rx; FM: 50-76MHz Rx, 76-108MHz Rx; VHF: 136-174MHz Tx/Rx, 174-350MHz Rx,350-400MHz Rx; UHF: 400-470MHz Tx/Rx, 470-600MHz Rx.
Buy: tidradio.com/products/h3-ham-radio
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#1837 Cheap Battery Tester Teardown
IMSAI Guy 2024-04-18 | Episode 1837
a bought this just for fun
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#1836 8 Pin DIP Random Bit Generator
IMSAI Guy 2024-04-17 | Episode 1836 chip of the day (sort of)
use a microcontroller (ATTINY85) as a bit generator
LFSR Random Number Generator: youtu.be/WGhRAbQ1fRw?si=lyA2oGOHiSBSX1BA
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#1835 HP 6299A 100V Power Supply (part 2 of 2)
IMSAI Guy 2024-04-16 | Episode 1835
fix it. I'm giving it back to the store for someone to buy.
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#1834 HP 6299A 100V Power Supply (part 1 of 2)
IMSAI Guy 2024-04-15 | Episode 1834
was given to me by anchor electronics. It has bizzare problem
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#1833 NDS9952A Dual P-chan N-chan FET
IMSAI Guy 2024-04-14 | Episode 1833 chip of the day
double your pleasure, double your fun
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#1832 MSGEQ7 7 Channel Graphics Equalizer
IMSAI Guy 2024-04-13 | Episode 1832 chip of the day
sold by Sparkfun, designed by mix-sig.com
code: github.com/imsaiguy/MSGEQ7
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#1831 Simple Op-amp Tester (part 2 of 2)
IMSAI Guy 2024-04-12 | Episode 1831
The boards are back! Lets try it out
Buy: pcbway.com/project/shareproject/Dual_and_Quad_OpAmp_SImple_Tester_f0fc4495.html
SMD soldering: youtu.be/aoG15wpobF4?si=YZZvK-BkDMXXUV7q
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#1830 Simple Op-amp Tester (part 1 of 2)
IMSAI Guy 2024-04-11 | Episode 1830
Simple dual and quad op-amp tester. A quick and easy project
Other people have circuits very very similar. I just wanted to do my own.
Buy: pcbway.com/project/shareproject/Dual_and_Quad_OpAmp_SImple_Tester_f0fc4495.html
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#1829 MAX338 Analog Switch Multiplexer
IMSAI Guy 2024-04-10 | Episode 1829 chip of the day
DG508 newer replacement
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#1828 433MHz Receiver IC CMT2210
IMSAI Guy 2024-04-09 | Episode 1828 chip of the day
scrap from million dollar donors. Reminds me of Logan's Run
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#1827 PZT2222A (aka 2N2222A) SOT223 SMD Transistor
IMSAI Guy 2024-04-08 | Episode 1827 chip of the day
old die, new package
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#1826 MAX11500 Triple Video Amp
IMSAI Guy 2024-04-07 | Episode 1826 chip of the day
video amplifier with filter
the 12dB gain was probably due to a non 50 ohm input/output
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#1825 TPS72518 1.8V Regulator
IMSAI Guy 2024-04-06 | Episode 1825 chip of the day
low drop out, enable, supervisor, 1A, SMD
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#1824 ROXON Flex Multi-tool Review
IMSAI Guy 2024-04-05 | Episode 1824
sent into the channel for review
roxontool.com/products/flex
KS2 Review: youtu.be/olt-z-Da_k0?si=Fw8TifhxnC1M-2Fr
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0:00 Previous Model
1:37 Roxon Flex Review
#1823 More Zappy Zap (Tesla coil)
IMSAI Guy 2024-04-04 | Episode 1823
the 555 survived: youtu.be/8QF_h43L9mg
how will the 74HC14 do?
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#1822 Pacific Radionics Power Supply PP-20-3 (part 3 of 3)
IMSAI Guy 2024-04-03 | Episode 1822
Repaired
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#1821 Pacific Radionics Power Supply PP-20-3 (part 2 of 3)
IMSAI Guy 2024-04-02 | Episode 1821
troubleshooting with reversed schematic
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#1820 Pacific Radionics Power Supply PP-20-3 (part 1 of 3)
IMSAI Guy 2024-04-01 | Episode 1820
A gift from anchor-electronics.com
Pacific Radionics Inc. 581 Division St., Campbell, Calif. history:
"Boole & Babbage, Inc., the systems evaluation firm also in Palo Alto, expects to broaden its measurements technology base with the acquisition of Pacific Radionics, of Campbell, which makes interfaces for process control. " -1970
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#1819 Multiple Bypass De-coupling Capacitors
IMSAI Guy 2024-03-31 | Episode 1819
is more better?
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#1818 Current Source from HP34401 Explained
IMSAI Guy 2024-03-30 | Episode 1818
viewer request, schematic review
Manual: keysight.com/us/en/assets/9018-05613/service-manuals/9018-05613.pdf
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#1817 Tunnel Diode AI301G (part 3 of 3) Oscillator
IMSAI Guy 2024-03-29 | Episode 1817 chip of the day
375MHz oscillator. the cap is called gimmic not mimic as I say in the video
tunnel diode: youtu.be/sdZkGjj9gFY
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#1816 Tunnel Diode AI301G (part 2 of 3)
IMSAI Guy 2024-03-28 | Episode 1816 chip of the day
Tunnel Diode Manual: worldradiohistory.com/BOOKSHELF-ARH/Technology/GE-Books/General%20Electric-Tunnel%20Diode%20Manual-First%20Edition-1961.pdf
Inductor values used in video: 20uH 440uH
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#1814 100,000 Subscribers!
IMSAI Guy 2024-03-26 | Episode 1814
Shop tour
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#1813 Handheld Tesla Coil
IMSAI Guy 2024-03-25 | Episode 1813
Let' see if we can kill a circuit
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#1812 HY1803 Killed in the Last Storm
IMSAI Guy 2024-03-24 | Episode 1812
I need to repair my power supply
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#1811 FNIRSI DPOX180H Oscilloscope Review
IMSAI Guy 2024-03-23 | Episode 1811
sent into the channel for review
update: new firmware fixes the issues shown
Buy: https://s.click.aliexpress.com/e/_op3Da0q
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#1810 Audio Spectrum using External Mixer
IMSAI Guy 2024-03-22 | Episode 1810
My spectrum analyzer goes down to 9kHz. using a mixer we can go lower
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#1809 D818G Zener Diode with Odd Behavior
IMSAI Guy 2024-03-21 | Episode 1809 chip of the day
this one has me stumped
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#1808 MCP23017 Serial I2C 16-bit Expander
IMSAI Guy 2024-03-20 | Episode 1808 chip of the day
similar to: youtu.be/FDxWaegzaXM
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IMSAI Guy 2024-03-19 | Episode 1807 circuit of the day
another oscillator circuit using a twin T notch in the feedback
I had already recorded this video, then Alan released his video first: youtu.be/KFVVozlXoOk?si=krxvnZ64ULhIrRSI
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