oh_bother

I'm a partnered streamer! Watch my show Tues/Thurs/Fri at 12:45 on twitch. Always something new to break/fix/disassemble. WorkVerbDesign at gmail

[oh_bother @WorkVerbDesign]

Check out project streams Tuesday Thursday and Friday at 12:45 EST. https://t.co/svMHGuakrZ

[oh_bother @WorkVerbDesign]

it's me I'm there too (with a stupid hyphen not an underscore)

[oh_bother @WorkVerbDesign]

@Evil_Nematode @oldestasian These companies love buying their own run of chips from mfgs, so it's something really proprietary (I'm guessing). They make a zillion of them so it makes sense, and unfortunately these are disposable after like 10 days of use (readings get wonky).

[mylo📡〰 @mylo_calibre]

three whole years.
Don't EVER give up on your own projects <3

[oh_bother @WorkVerbDesign]

stop liking this it's out of focus

[oh_bother @WorkVerbDesign]

Side panel... Fits! It took a few more "iterations" than I would like but now we have a programming hole and two power holes.

[Giliam de Carpentier @decarpentier_nl]

By popular request, I've now open sourced the exact dimensions of the evolved Carpentopod's linkage system. So feel free to use it for your own projects! https://t.co/NdDNDVp4xo

[Z80でCP/MとかFUZIXとか @DragonBallEZ]

回してカリカリしてると癒されるな🥹

ざっくりとCH0/1/2を選んで周波数0.1〜99.9MHzを設定するの書いてみた🤣
#Si5351A #パイソンはいいぞ #ラズパイピコ2

[Tom DesLongchamp @tomthinks]

The internet is a silly place and I am a silly person.

[handaru @handaru20pF]

できた

[MiltonTPike1 @MiltonTPike1]

Tomorrow (Friday 30 Aug)

12:00PM Noon EST / 9:00AM PST

as Kiki would say - THE CUMBACK

[Cyber City Circuits @MakeAugusta]

When you get the traces just right.

[jon | super vhs @reaction105]

A Brief History of the Paranormal Activity Ghost Ride, sponsored by Universal Studios™ [Censored Edition]

Firstly, here is the source image @MikeStoklasa used in HitB ep40 (2012). It is from a ride called "The Fright Zone", at Erieview Park, Ohio. But it did not start there.

[Cyber City Circuits @MakeAugusta]

When you didn’t get UART backwards.

[pyroesp @pyroesp]

@minagi_yu Nice! I'm also making a VFD clock.

https://t.co/NM3mdQdoC0

[John Nguyen @JnNoogen]

Animation Masterclass

[wizz from twittеr ★ @twigspaste]

this is literally my fav video of all time

[Yarden Shafir @yarden_shafir]

CrowdStrike effectively bricked windows, Mac and Linux today.

Windows machines won’t boot, and Mac and Linux work is abandoned because all their users are on twitter making memes.

Incredible work.

[uwo's lab | the funny science man @uwutoowo1]

I made an innovative gardening device

[ElectronicsNotes by Ian Poole @ElecNotes]

How to Pick a Replacement Transistor when the Original Type is Not Available

It often occurs the an original type of transistor is not available when repairing or servicing old equipment. Here’s how to get the best match.

Step by step instructions:

1Choose a transistor of the same polarity:   The first major selection criterion is whether the transistor is PNP or NPN.

2Select a replacement transistor of the same material:   Most transistors are either silicon or germanium. As bias voltages and other features are different it is necessary to select a replacement transistor with the same material.

3Select the same functional type of transistor:   Transistors are normally given an indication of their application in the datasheets. The replacement should have the same application if possible.

4Choose a replacement with the same package:   Choosing a replacement transistor with the same package and pin-out will facilitate much easier replacement. Differences in the package for small signal transistors is not normally an issue, but for larger ones where there may be heatsinks, etc involved, different packages can cause significant issues. Pin connections need to be considered as well.

5Select a replacement transistor with the same breakdown voltage:   Ensure that figures for VCEO and VCBO etc are at least as high as the original transistor.

6Check it can take the current:   Ensure that the replacement transistor can pass the required current - it should have an ICmax greater than or equal to the original transistor.

7Select a transistor with a similar Hfe:   It is necessary to ensure that the current gain of the replacement transistor is about the same as the original. Current gain values normally vary widely even for transistors of the same type so some variation will be acceptable.

8Select a replacement transistor with equivalent Ft:   It is necessary to ensure that the replacement transistor will be able to operate at the relevant frequencies, so a similar or slightly higher Ft is advisable. Don't go for a transistor with a much higher Ft as this may increase the risk of oscillation.

9Choose a transistor with a similar power dissipation :   It is necessary to ensure that the replacement transistor can handle the power that it will dissipate within the circuit. Choosing a replacement transistor with a similar can style will often mean that both transistors have a similar power dissipation.

10Check for any special features:   While ensuring the features above are selected, there may be some additional features that need to be considered. These are normally required when transistors are used in specialist applications.

You should then have a type or types that will suitably replace the original.

[ElectronicsNotes by Ian Poole @ElecNotes]

The Op amp Wien Bridge sine wave oscillator or generator is an excellent circuit for generating a sine wave signal at audio frequencies and above.

Find out now: https://t.co/QsZKD3eFOa