October 27, 2013

Hanns-G Monitor Power Supply Fix Under $10

How to fix a Hanns-G HC194DP 19″ monitor’s power supply for $10 or less

Hanns-G Four of the new capacitorsYour Hanns-G monitor is not working. Your power light flashes, you hear a popping sound and yet the monitor does not come on right? This sounds familiar doesn’t it? Some time ago your monitor made some popping noise when you first turned it on but it would still turn on. Over time it took longer and longer to turn on and continued to make the popping noise. Now it will not turn on at all. Guess what…your monitor likely has a blown capacitor or eleven. The good news is this is an easy fix if you are confident with a soldering iron and disassembling sensitive electronics.

How To Fix Your Hanns-G Monitor Power Supply

At this point I am going to assume you are technically savvy if you are taking on disassembling a monitor’s power supply so I will only give you the details.

  1. Disassemble the monitor.
  2. Identify and remove the power supply board (see picture below).
  3. Identify the bad capacitors. They will have a “domed” top indicating that they have burst.
  4. Desolder bad capacitors and solder in the new capacitors (full list below the pictures).
    • Note that you can you a capacity with a higher voltage but the UF must be the same.
  5. Reassemble. If you forgot the plug locations for the power supply (like I did), see the picture below.

Power Supply Location

Hanns-G Power Supply Location

Bad Capacitor – “Domed” Top

Hanns-G Bad capacitors domed top

Power Supply Plug Locations

(not that we forgot where they go or anything like that)
Hanns-G Plug Locations

Full List of Capacitors

This is a full listing of all of the capacitors on the board except for the HUGE on which I am told rarely goes out. I only replaced six of the capacitors on my monitor based on the damage I observed.

Board Location – µF, Volts

  • C8 – 4.7µF, 50V
  • C10 – 47µF, 50V
  • C51 – 470µF, 25V
  • C52 – 470µF, 25V
  • C54 – 1000µF, 10V
  • C56 – 1000µF, 10V
  • C57 – 100µF, 25V
  • C59 – 100µF, 10V
  • C62 – 100µF, 25V
  • C101 – 220µF, 25V
  • C102 – 220µF, 25V

Where To Get The Parts Cheap

I recommend shopping Tayda Electronics. They are the cheapest place I have found any electronics such as capacitors, resistors, ICs, proto boards, and tons of other good stuff. They do not have the selection of an Adafruit or Digikey, but for what they do have it does not get any cheaper. I do not work for Tayday nor do I get any kind of referral compensation from them. They are just a vendor I been very pleased to work with. Thanks Tayda!



August 8, 2013

Why Link V Belts Are Better

Link V belts offer much less vibration resulting in less noise and increased precision

Link V belts are better because they offer a reduced amount of vibration and a reasonably low price (usually under $30). I was skeptical myself before purchasing a Link V belt so to demonstrate their value I put the following video together.

Pay close attention to the motor and even the studs on the motor. You will notice with the standard V belt there is a lot more vibration while running. During the startup and shutdown there is noticeable surging with the standard V belt also that you do not see with the Link V belt.


July 17, 2013

Disabling Comments and Trackbacks in WordPress

A simple way to disable comments, pings, and trackbacks across an entire WordPress site

If you are managing a website via WordPress as your CMS you likely have many pages that you do not want comments or pings / trackbacks displaying. A simple way to disable these across an entire site is to change the setting in WordPress’ database.

Disabling WordPress comments, pings / trackbacks by issuing an SQL command in the database is the simplest way to do it across an entire site. If you have no idea what SQL is then I highly advise you not to try this. Below are the simple SQL commands to disable comments, pings / trackbacks across an entire WordPress site.

Disabling Pings / Trackbacks

The SQL commands below changes the “ping_status” field of published posts & pages to “closed”. Notice that there is a separate SQL statement for each post type. If you had custom post types you would need to issue SQL commands for each post type by changing the “post_type” variable to the applicable custom post type.
UPDATE wp_posts SET ping_status='closed' WHERE post_status = 'publish' AND post_type = 'post';
UPDATE wp_posts SET ping_status='closed' WHERE post_status = 'publish' AND post_type = 'page';

Disabling Comments

The SQL commands below changes the “comment_status” field of published posts & pages to “closed”. This is similar to the SQL statement above for disabling pings / trackbacks in that you will need to issue the SQL command for both the post and page post type plus any other custom post types you have defined.
UPDATE wp_posts SET comment_status='closed' WHERE post_status = 'publish' AND post_type = 'post';
UPDATE wp_posts SET comment_status='closed' WHERE post_status = 'publish' AND post_type = 'page';

That is it. With four simple SQL queries you can disable comment, pings, and trackbacks across your entire WordPress site.



June 19, 2013

Cutting Plywood & Other Sheet Goods

How To Simplify Cutting Sheet Goods In Your Garage Shop

As I am starting to cut the parts for my first daughter’s dresser, I am realizing my table saw is not the best tool for the job. A 4′ x 8′ sheet good at 3/4″ can get quite heavy. Trying to maneuver it over anything less that a cabinet maker’s table saw with long out feed tables is just not going work to well (safely) in a garage shop.  I did some research and found that most people talking about cutting sheet goods online use their good old circular saw to make the cuts. Means of supporting the sheet good varies, but most people either use two-by material being laid on the ground or a thick foam laid on the ground. And for making the cut straight, almost all home woodworkers are using a straightedge clamped to the sheet good.

Great Resources On Handing Sheet Goods

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