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leumasyerrp

Mechanical Engineer who dabbles in electronics as a hobby

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19 Followers
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4 Projects
46 Likes
leumasyerrp
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This user joined on 12/06/2016.

1.3k
24
7
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Simple desk/handheld calculator to convert between hexadecimal, decimal, and binary.
Project Owner Contributor

Base Convert

leumasyerrpleumasyerrp

513
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Foot pedal operated SMD Vacuum for manual placement of components. This upgrade from tweezers simplifies SMD placement during PCB assembly.
Project Owner Contributor

Manual Pick and Place SMD Vacuum

leumasyerrpleumasyerrp

1.3k
9
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Repair of a Mantis microscope using 3D printing
Project Owner Contributor

Mantis Microscope Repair

leumasyerrpleumasyerrp

471
8
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Making the SmartyKat Crazy Cruiser smart to lower battery usage.
Project Owner Contributor

Smart SmartyKat Toy

leumasyerrpleumasyerrp

49.1k
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7 segment clock
Project Owner Contributor

EPTAORA

ekaggrat-singh-kalsiekaggrat singh kalsi

18.3k
519
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A LISP-programmable laptop with battery life measured in years
Project Owner Contributor

PotatoP

andreas-eriksenAndreas Eriksen

16.9k
97
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Mouse Whisperer is a small development kit that is based on ATtiny85. It will act like a physical mouse and draw circles when you're away
Project Owner Contributor

Mouse whisperer

andriymalyshenkoandriy.malyshenko

11.2k
73
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Grow vegetables with ultraponics tower
Project Owner Contributor

UltraTower

j-gleyzesJ Gleyzes

11.2k
68
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59
Flea-Scope™ is a very low-cost and easy-to-use 18 Msps USB oscilloscope and mixed-signal logic analyzer.
Project Owner Contributor

Flea-Scope™ USB O-scope (18 Msps, $13 BoM, WebUSB)

richard-testardiRichard Testardi

9.7k
81
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4Ch Input & 2Ch Output 1MSps STM32 based oscilloscope
Project Owner Contributor

STM32G4 Scope

jgpeirojgpeiro

9.3k
57
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A SCPI programmable precision resistor
Project Owner Contributor

Programmable Precision Resistor

sebastianSebastian

7.9k
42
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Making the most of non-ideal components in a non-ideal world.
Project Owner Contributor

Multislope ADC

nnniNNNI

6.6k
134
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A marker pen sized Geiger counter with up to 12 months battery life from 2xLR44, based on STM8L152K4 microcontroller
Project Owner Contributor

Compact, low-power Geiger counter

bleakytexBleakyTex

6.3k
59
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Differential scope probe
Project Owner Contributor

PD150

craig-dCraig D

3.8k
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It is a python handheld computer with a complete keyboard and a symbolic math engine inside it.
Project Owner Contributor

Galdeano handheld computer

angel-cabelloAngel Cabello

3.6k
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CMOS Homemade Operational Amplifier module and a photo detector using it.
Project Owner Contributor

CMOS Homemade Operational Amplifier

mitsuru-yamadaMitsuru Yamada

3k
7
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A quad OpAmp Makes a Buck Regulator
Project Owner Contributor

OpAmp Buck Regulator

aaron-lagerAaron Lager

2.1k
7
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Solar-powered creatures that react to energy with animations on a 7-segment LCD. And they blink at night!
Project Owner Contributor

LCD Solar Creatures

gaborGabor

1.7k
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A very useful test fixture to convert the voltage or impedance seen on its input to a variable frequency audible tone
Project Owner Contributor

Beeper Box: Analog V2F

john-guyJohn Guy

1.2k
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An extremely low cost universal tensile testing machine made from 3D printed and commercial materials
Project Owner Contributor

Low Cost Universal Tensile Testing Machine

xieshi-zhangXieshi Zhang

970
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Debug Uno/ATmega328P with CH552 debugger in Arduino IDE 2.0.0 with Debug Wire
Project Owner Contributor

Debug Arduino Uno / ATmega328P in Arduino IDE 2

deqingdeqing

444
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ISP and UPDI Combo Programmer for AVR Microcontrollers
Project Owner Contributor

CH552 picoAVR ISP+UPDI Programmer

stefan-wagnerStefan Wagner

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Mitsuru Yamada wrote 05/23/2023 at 05:46 • point

Thank you for liking and following my #CMOS Homemade Operational Amplifier ! I did the re-test yesterday and revised the bias current estimates described in the article.

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