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\documentclass[11pt]{article}
%Gummi|065|=)
\usepackage{graphicx,caption}
\title{\textbf{Car Transmission Repair}}
\author{Steak Electronics}
\date{2018 (revised 2019)}
\begin{document}
\maketitle
\section{Work Log}
Just a quick note here.
\vspace{0.2in}
I awoke one morning to find my car would not shift beyond first gear, and that the MPH gauge had failed. I smelt something burning. Upon opening the hood I found a bunny (alive) inside. I was able to coerce him to leave, and then repaired the two wires he chewed up.
\vspace{0.2in}
Car was back in working condition.
\vspace{0.2in}
See pictures.
\section{Additional Details}
The bunny had chewed up two of the wires. What happened, is that two sense wires to the transmission had failed, and as a result, the car was unable to control the transmission. A mechanic later implied that animals chewing wires was not uncommon. I was even fortunate enough to run into a bunny stuck in the car. Perhaps I caught him in the act.
Since the wires were broken, it was simply an issue of having a portable soldering iron, and some solder. I brought the iron down to my car, adding some additional wire on, and soldered both ends. A trivial job for an electronics-wise fellow.
Soldering near the engine was a little scary, but I didn't leave anything open.
\end{document}

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\documentclass[11pt]{article}
%Gummi|065|=)
\title{\textbf{Computer Switch Board}}
\author{Steak Electronics}
\date{03/17/19}
\begin{document}
\maketitle
\section{Requirements}
\begin{itemize}
\item large pcb board
\item fused power input - EDIT: instead I will have a case around the nano, 3d printed, and have the case connect into the pcb, i.e. cutouts for the case in the pcb, and clips on case. the rest of the pcb will be fused somewhere, after the nano. but nano powers it.
\item arduino nano
\item switch to activate things
\item rotary to change number
\item 7 digit display to list number, and shift register, resistors
\item explanation of what numbers do on board
\item 3d printed cover over nano
\end{itemize}
\section{build notes}
The 7 segment symbols are abstracted in kicad. Job security for engineers.
The example gave a common Vcc, with all pins being connected to GND, and sinked when on.
The data sheet of the 7seg, omits the schematic. but does show that it is common anode, or common vcc. Pin 3 is left out, but that is VCC.
\end{document}

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\documentclass[11pt]{article}
%Gummi|065|=)
\usepackage{graphicx,caption}
\title{\textbf{Car Transmission Repair}}
\author{Steak Electronics}
\date{2018 (revised 2019)}
\begin{document}
\maketitle
\section{Work Log}
Just a quick note here.
\vspace{0.2in}
I awoke one morning to find my car would not shift beyond first gear, and that the MPH gauge had failed. I smelt something burning. Upon opening the hood I found a bunny (alive) inside. I was able to coerce him to leave, and then repaired the two wires he chewed up.
\vspace{0.2in}
Car was back in working condition.
\vspace{0.2in}
See pictures.
\begin{center}
\includegraphics[scale=0.3]{../pics/DSCN0857.JPG}
\captionof{figure}{Cut off the connector at one end, so I can attach wires to it. This is what connected to the transmission}
\includegraphics[scale=0.3]{../pics/DSCN0860.JPG}
\captionof{figure}{Wires visibly chewed here}
\includegraphics[scale=0.3]{../pics/DSCN0861.JPG}
\captionof{figure}{Further up the wire sleeve, where the wires are not chewed. Here I can cut them and solder new wires in. There are four wires here, as the sleeve was used for multiple wires.}
\includegraphics[scale=0.3]{../pics/DSCN0864.JPG}
\captionof{figure}{}
\end{center}
\section{Additional Details}
The bunny had chewed up two of the wires. What happened, is that two sense wires to the transmission had failed, and as a result, the car was unable to control the transmission. A mechanic later implied that animals chewing wires was not uncommon. I was even fortunate enough to run into a bunny stuck in the car. Perhaps I caught him in the act.
Since the wires were broken, it was simply an issue of having a portable soldering iron, and some solder. I brought the iron down to my car, adding some additional wire on, and soldered both ends. A trivial job for an electronics-wise fellow.
Soldering near the engine was a little scary, but I didn't leave anything open. Get in and get out.
\end{document}

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\documentclass[11pt]{article}
%Gummi|065|=)
\usepackage{graphicx,caption}
\title{\textbf{Car Transmission Repair}}
\author{Steak Electronics}
\date{2018 (revised 2019)}
\begin{document}
\maketitle
\section{Work Log}
Just a quick note here.
\vspace{0.2in}
I awoke one morning to find my car would not shift beyond first gear, and that the MPH gauge had failed. I smelt something burning. Upon opening the hood I found a bunny (alive) inside. I was able to coerce him to leave, and then repaired the two wires he chewed up.
\vspace{0.2in}
Car was back in working condition.
\vspace{0.2in}
See pictures.
\section{Additional Details}
The bunny had chewed up two of the wires. What happened, is that two sense wires to the transmission had failed, and as a result, the car was unable to control the transmission. A mechanic later implied that animals chewing wires was not uncommon. I was even fortunate enough to run into a bunny stuck in the car. Perhaps I caught him in the act.
Since the wires were broken, it was simply an issue of having a portable soldering iron, and some solder. I brought the iron down to my car, adding some additional wire on, and soldered both ends. A trivial job for an electronics-wise fellow.
Soldering near the engine was a little scary, but I didn't leave anything open.
\end{document}

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\documentclass[11pt]{article}
%Gummi|065|=)
\usepackage{graphicx,caption}
\title{\textbf{Car Transmission Repair}}
\author{Steak Electronics}
\date{2018 (revised 2019)}
\begin{document}
\maketitle
\section{Work Log}
Just a quick note here.
\vspace{0.2in}
I awoke one morning to find my car would not shift beyond first gear, and that the MPH gauge had failed. I smelt something burning. Upon opening the hood I found a bunny (alive) inside. I was able to coerce him to leave, and then repaired the two wires he chewed up.
\vspace{0.2in}
Car was back in working condition.
\vspace{0.2in}
See pictures.
\begin{center}
\includegraphics[scale=0.3]{../pics/DSCN0857.JPG}
\captionof{figure}{Cut off the connector at one end, so I can attach wires to it. This is what connected to the transmission}
\includegraphics[scale=0.3]{../pics/DSCN0860.JPG}
\captionof{figure}{Wires visibly chewed here}
\includegraphics[scale=0.3]{../pics/DSCN0861.JPG}
\captionof{figure}{Further up the wire sleeve, where the wires are not chewed. Here I can cut them and solder new wires in. There are four wires here, as the sleeve was used for multiple wires.}
\includegraphics[scale=0.3]{../pics/DSCN0864.JPG}
\captionof{figure}{With portable soldering iron (portasol butane powered) and some wire, this is an easy fix. A little scary, though, being close to the gas line. Even if gas burns not explodes I don't want any surprises. I made sure nothing was open, exposed, or leaking. Be careful out there!}
\includegraphics[scale=0.3]{../pics/DSCN0865.JPG}
\captionof{figure}{It's a sloppy hack, but function over form. The car works! We are set until the bunny returns. This time I gave him lots of easily accessible wire to chew.}
\end{center}
\section{Additional Details}
The bunny had chewed up two of the wires. What happened, is that two sense wires (?) to the transmission had failed, and as a result, the car was unable to control the transmission. A mechanic later implied that animals chewing wires was not uncommon. I was even fortunate enough to run into a bunny stuck in the car. Perhaps I caught him in the act.
Since the wires were broken, it was simply an issue of having a portable soldering iron, and some solder. I brought the iron down to my car, adding some additional wire on, and soldered both ends. A trivial job for an electronics-wise fellow.
Soldering near the engine was a little scary, but I didn't leave anything open. Get in and get out.
\end{document}

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\documentclass[11pt]{article}
%Gummi|065|=)
\usepackage{graphicx,caption}
\title{\textbf{Car Transmission Repair}}
\author{Steak Electronics}
\date{2018 (revised 2019)}
\begin{document}
\maketitle
\section{Work Log}
Just a quick note here.
\vspace{0.2in}
I awoke one morning to find my car would not shift beyond first gear, and that the MPH gauge had failed. I smelt something burning. Upon opening the hood I found a bunny (alive) inside. I was able to coerce him to leave, and then repaired the two wires he chewed up.
\vspace{0.2in}
Car was back in working condition.
\vspace{0.2in}
See pictures.
\begin{center}
\includegraphics[scale=0.3]{../pics/DSCN0857.JPG}
\captionof{figure}{Cut off the connector at one end, so I can attach wires to it. This is what connected to the transmission}
\includegraphics[scale=0.3]{../pics/DSCN0860.JPG}
\captionof{figure}{Wires visibly chewed here}
\includegraphics[scale=0.3]{../pics/DSCN0861.JPG}
\captionof{figure}{Further up the wire sleeve, where the wires are not chewed. Here I can cut them and solder new wires in. There are four wires here, as the sleeve was used for multiple wires.}
\includegraphics[scale=0.3]{../pics/DSCN0864.JPG}
\captionof{figure}{}
\end{center}
\section{Additional Details}
The bunny had chewed up two of the wires. What happened, is that two sense wires to the transmission had failed, and as a result, the car was unable to control the transmission. A mechanic later implied that animals chewing wires was not uncommon. I was even fortunate enough to run into a bunny stuck in the car. Perhaps I caught him in the act.
Since the wires were broken, it was simply an issue of having a portable soldering iron, and some solder. I brought the iron down to my car, adding some additional wire on, and soldered both ends. A trivial job for an electronics-wise fellow.
Soldering near the engine was a little scary, but I didn't leave anything open. Get in and get out.
\end{document}

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\documentclass[11pt]{article}
%Gummi|065|=)
\usepackage{graphicx,caption}
\title{\textbf{Car Transmission Repair}}
\author{Steak Electronics}
\date{2018 (revised 2019)}
\begin{document}
\maketitle
\section{Work Log}
Just a quick note here.
\vspace{0.2in}
I awoke one morning to find my car would not shift beyond first gear, and that the MPH gauge had failed. I smelt something burning. Upon opening the hood I found a bunny (alive) inside. I was able to coerce him to leave, and then repaired the two wires he chewed up.
\vspace{0.2in}
Car was back in working condition.
\vspace{0.2in}
See pictures.
\begin{center}
\includegraphics[scale=0.3]{../pics/DSCN0857.JPG}
\captionof{figure}{Cut off the connector at one end, so I can attach wires to it. This is what connected to the transmission}
\includegraphics[scale=0.3]{../pics/DSCN0860.JPG}
\captionof{figure}{Wires visibly chewed here}
\includegraphics[scale=0.3]{../pics/DSCN0861.JPG}
\captionof{figure}{Further up the wire sleeve, where the wires are not chewed. Here I can cut them and solder new wires in. There are four wires here, as the sleeve was used for multiple wires.}
\includegraphics[scale=0.3]{../pics/DSCN0864.JPG}
\captionof{figure}{With portable soldering iron (portasol butane powered) and some wire, this is an easy fix. A little scary, though, being close to the gas line. Even if gas burns not explodes I don't want any surprises. I made sure nothing was open, exposed, or leaking. Be careful out there!}
\includegraphics[scale=0.3]{../pics/DSCN0865.JPG}
\captionof{figure}{It's a sloppy hack, but function over form. The car works! We are set until the bunny returns. This time I gave him lots of easily accessible wire to chew.}
\end{center}
\section{Additional Details}
The bunny had chewed up two of the wires. What happened, is that two sense wires (?) to the transmission had failed, and as a result, the car was unable to control the transmission. A mechanic later implied that animals chewing wires was not uncommon. I was even fortunate enough to run into a bunny stuck in the car. Perhaps I caught him in the act.
Since the wires were broken, it was simply an issue of having a portable soldering iron, and some solder. I brought the iron down to my car, adding some additional wire on, and soldered both ends. A trivial job for an electronics-wise fellow.
Soldering near the engine was a little scary, but I didn't leave anything open. Get in and get out.
\end{document}

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\documentclass[11pt]{article}
\usepackage{caption,graphicx}
\date{2018 (revised 2019)}
\begin{document}
\tableofcontents
\section{Harbor Freight Bauer Drill Repair}
\subsection{Overview}
At a company I work for a drill was purchased from Harbor Freight. It was a Bauer 1791c-b1 drill. Sold for about \$40 US in 2018. I knew buying anything electrical or electronic was a bad idea from Harbor Freight. It is generally known that while their products are cheap, they are also likely to fail early, and fail often (to steal a word from startup world).
\subsection{Background}
I was using the drill when it failed. Not in any excessive capacity, instead simply using the drill, moderately. I began to smell something burning, but the drill continued to work. After another moment, the drill was completely failed. What had happened, is that one of the DPak FETs had failed, then the other.
\includegraphics[scale=0.3]{../pics/DSCN0677.JPG}
\captionof{figure}{This style seems to be the current favorite (techy red and grip, with a square lithium pack). A trip to the hardware store will reveal other brands with similar looks as of 2018.}
\subsection{Repair Notes}
2 Dpak components have big burnt out holes on them. Need replacement. What is their pinout?
Motor is Mabuchi model: RZ-735VA-A014. Range 6-20 volts.
Switch before motor is 7.2 – 24 volts.
Micro is TI msp430g252. \footnote{Wait, this drill needs a microcontroller? As in a computer in a drill? Why not an IOT drill then? But, I suppose having an IOT drill is ridiculous, and likewise so is having source code in a drill.}
Question is, what is the level of the voltage regulator? Is it 20V?
It appears to be an onsemi model such as: CS52015
I can't find an exact match from Digikey which only searches current models, not historical models.
I may be able to throw an adjustable vreg with similar pinout in...
The battery is 20V. The dpaks are getting power, only when switch is pressed.
\includegraphics[scale=1]{../pics/mcupinout.png}
\captionof{figure}{Pinout for MSP430}
\includegraphics[scale=0.9]{../pics/schem.jpg}
\captionof{figure}{Rough schematic for board (see colour picture in repo). When switch is pressed, there is 20V on the tab of FET. I believe the FET must've overheated and shorted (perhaps counterfeit?). Though Right pin is to GND. Maybe it's a current limiter, not a FET, allowing Tab when V+ to be dropped down and current will flow. Too bad I wasn't able to stop using the drill before both FETs failed. I could've read one of them.}
\includegraphics[scale=0.7]{../pics/threadcapture.jpg}
\captionof{figure}{A short post to an anonymous image board for assistance}
\subsection{Work Log 12/2018}
I was unable to find the exact pinout for the N-Channel I needed, so thought maybe the anon was wrong in his post. I purchased some N-Channels which seem to be standardized with the pinouts being drain on the tab, not source. But these do not work. Short circuit protection appears to kick in, and the Dpak overheats quickly. I did not see any Nchannel Dpaks with the pinout he mentioned. Whether N channel or P channel or high or low side switching I see there are four types, with one being more common, and one being least common. (N Channel - low most common. P channel low least common.). Upon further research, looks like anon was mistaken in pin names, but this link:https://www.embeddedrelated.com/showarticle/98.php
seems to show the drain as tab, and source as right pin would be correct here. So after the replacement, the devices spins for a short second, then stops. Something else is broken.
Checking the pins of the msp430 with a scope, I can see it has a sleep mode, a pin to control gate, a pin to control LED. I thought I saw UART, but it's just a CLK input. Led is two or three to the left. There also seems to be some pin, maybe adc monitoring drill (top, right side pin).
\end{document}

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\contentsline {subsection}{\numberline {1.1}Overview}{1}
\contentsline {subsection}{\numberline {1.2}Background}{1}
\contentsline {subsection}{\numberline {1.3}Repair Notes}{2}
\contentsline {subsection}{\numberline {1.4}Work Log 12/2018}{5}

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\documentclass[11pt]{article}
\usepackage{caption,graphicx}
\date{2018 (revised 2019)}
\begin{document}
\tableofcontents
\section{Harbor Freight Bauer Drill Repair}
\subsection{Overview}
At a company I work for a drill was purchased from Harbor Freight. It was a Bauer 1791c-b1 drill. Sold for about \$40 US in 2018. I knew buying anything electrical or electronic was a bad idea from Harbor Freight. It is generally known that while their products are cheap, they are also likely to fail early, and fail often (to steal a word from startup world).
\subsection{Background}
I was using the drill when it failed. Not in any excessive capacity, instead simply using the drill, moderately. I began to smell something burning, but the drill continued to work. After another moment, the drill was completely failed. What had happened, is that one of the DPak FETs had failed, then the other.
\includegraphics[scale=0.3]{../pics/DSCN0677.JPG}
\captionof{figure}{This style seems to be the current favorite (techy red and grip, with a square lithium pack). A trip to the hardware store will reveal other brands with similar looks as of 2018.}
\subsection{Repair Notes}
2 Dpak components have big burnt out holes on them. Need replacement. What is their pinout?
Motor is Mabuchi model: RZ-735VA-A014. Range 6-20 volts.
Switch before motor is 7.2 – 24 volts.
Micro is TI msp430g252. \footnote{Wait, this drill needs a microcontroller? As in a computer in a drill? Why not an IOT drill then? But, I suppose having an IOT drill is ridiculous, and likewise so is having source code in a drill.}
Question is, what is the level of the voltage regulator? Is it 20V?
It appears to be an onsemi model such as: CS52015
I can't find an exact match from Digikey which only searches current models, not historical models.
I may be able to throw an adjustable vreg with similar pinout in...
The battery is 20V. The dpaks are getting power, only when switch is pressed.
\includegraphics[scale=1]{../pics/mcupinout.png}
\captionof{figure}{Pinout for MSP430}
\includegraphics[scale=0.9]{../pics/schem.jpg}
\captionof{figure}{Rough schematic for board (see colour picture in repo). When switch is pressed, there is 20V on the tab of FET. I believe the FET must've overheated and shorted (perhaps counterfeit?). Though Right pin is to GND. Maybe it's a current limiter, not a FET, allowing Tab when V+ to be dropped down and current will flow. Too bad I wasn't able to stop using the drill before both FETs failed. I could've read one of them.}
\includegraphics[scale=0.7]{../pics/threadcapture.jpg}
\captionof{figure}{A short post to an anonymous image board for assistance}
\subsection{Work Log 12/2018}
I was unable to find the exact pinout for the N-Channel I needed, so thought maybe the user was wrong in his post. I purchased some N-Channels which seem to be standardized with the pinouts being drain on the tab, not source. But these do not work. Short circuit protection appears to kick in, and the Dpak overheats quickly. I did not see any Nchannel Dpaks with the pinout he mentioned. Whether N channel or P channel or high or low side switching I see there are four types, with one being more common, and one being least common. (N Channel - low most common. P channel low least common.). Upon further research, looks like anon was mistaken in pin names, but this link:https://www.embeddedrelated.com/showarticle/98.php
seems to show the drain as tab, and source as right pin would be correct here. So after the replacement, the devices spins for a short second, then stops. Something else is broken.
Checking the pins of the msp430 with a scope, I can see it has a sleep mode, a pin to control gate, a pin to control LED. I thought I saw UART, but it's just a CLK input. Led is two or three to the left. There also seems to be some pin, maybe adc monitoring drill (top, right side pin).
\end{document}

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\documentclass[11pt]{article}
\usepackage{caption,graphicx}
\date{2018 (revised 2019)}
\begin{document}
\tableofcontents
\section{Harbor Freight Bauer Drill Repair}
\subsection{Overview}
At a company I work for a drill was purchased from Harbor Freight. It was a Bauer 1791c-b1 drill. Sold for about \$40 US in 2018. I knew buying anything electrical or electronic was a bad idea from Harbor Freight. It is generally known that while their products are cheap, they are also likely to fail early, and fail often (to steal a word from startup world).
\subsection{Background}
I was using the drill when it failed. Not in any excessive capacity, instead simply using the drill, moderately. I began to smell something burning, but the drill continued to work. After another moment, the drill was completely failed. What had happened, is that one of the DPak FETs had failed, then the other.
\includegraphics[scale=0.3]{../pics/DSCN0677.JPG}
\captionof{figure}{This style seems to be the current favorite (techy red and grip, with a square lithium pack). A trip to the hardware store will reveal other brands with similar looks as of 2018.}
\subsection{Repair Notes}
2 Dpak components have big burnt out holes on them. Need replacement. What is their pinout?
Motor is Mabuchi model: RZ-735VA-A014. Range 6-20 volts.
Switch before motor is 7.2 – 24 volts.
Micro is TI msp430g252. \footnote{Wait, this drill needs a microcontroller? As in a computer in a drill? Why not an IOT drill then? But, I suppose having an IOT drill is ridiculous, and likewise so is having source code in a drill.}
Question is, what is the level of the voltage regulator? Is it 20V?
It appears to be an onsemi model such as: CS52015
I can't find an exact match from Digikey which only searches current models, not historical models.
I may be able to throw an adjustable vreg with similar pinout in...
The battery is 20V. The dpaks are getting power, only when switch is pressed.
\includegraphics[scale=1]{../pics/mcupinout.png}
\captionof{figure}{Pinout for MSP430}
\includegraphics[scale=0.9]{../pics/schem.jpg}
\captionof{figure}{Rough schematic for board (see colour picture in repo). When switch is pressed, there is 20V on the tab of FET. I believe the FET must've overheated and shorted (perhaps counterfeit?). Though Right pin is to GND. Maybe it's a current limiter, not a FET, allowing Tab when V+ to be dropped down and current will flow. Too bad I wasn't able to stop using the drill before both FETs failed. I could've read one of them.}
\includegraphics[scale=0.7]{../pics/threadcapture.jpg}
\captionof{figure}{A short post to an anonymous image board for assistance}
\subsection{Work Log 12/2018}
I was unable to find the exact pinout for the N-Channel I needed, so thought maybe the anon was wrong in his post. I purchased some N-Channels which seem to be standardized with the pinouts being drain on the tab, not source. But these do not work. Short circuit protection appears to kick in, and the Dpak overheats quickly. I did not see any Nchannel Dpaks with the pinout he mentioned. Whether N channel or P channel or high or low side switching I see there are four types, with one being more common, and one being least common. (N Channel - low most common. P channel low least common.). Upon further research, looks like anon was mistaken in pin names, but this link:https://www.embeddedrelated.com/showarticle/98.php
seems to show the drain as tab, and source as right pin would be correct here. So after the replacement, the devices spins for a short second, then stops. Something else is broken.
Checking the pins of the msp430 with a scope, I can see it has a sleep mode, a pin to control gate, a pin to control LED. I thought I saw UART, but it's just a CLK input. Led is two or three to the left. There also seems to be some pin, maybe adc monitoring drill (top, right side pin).
\end{document}

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Harbor_Freight_Bauer_drill_1791c-b1/docs/2.toc View File