Sunday, May 3, 2009

Workbench fun - Repairing a broken USB device

My wife came to me after a day of teaching with a small crisis on her hands... or rather, in her hands. The RF wireless presentation remote she used every day (The Presentation Pilot Pro) was accidentally broken by a student. A helpful gesture of pushing in a chair happened to catch the USB receiver plugged into the back of her desktop, and snapped the plug right off, including a small piece of the circuit board. A new remote & receiver costs about $70, and to order just the receiver would still be $50, so any way to repair it and avoid that expense would be to our advantage. Of course this is my strange idea of fun, so I dove in and took it apart to survey the damage and see if it could be fixed.

The metal housing of the plug was actually soldered to the board for strength in two spots. One of those solder joints broke off the board, but the other joint held, taking a small piece of the circuit board with it when it was broken. As for the 4 connections for the USB, it wasn't looking good. I took several close-up photos of the damage since it was so small, and used my multimeter to try to find points I could solder to. Unfortunately the USB connections were solid, so when the plug was ripped off, it pulled off the metal contacts on the board and some of the substrate. This left me with nothing substantial to solder to, and I wasn't sure I could just put it back the way it was. I've done small repair work like this before, but this one wasn't so simple, so I decided to attack it from a different direction.

The largest chip on the board had a clearly written part number on it: "CY7C63723C" which after some Google searching turned out to be a "USB Combination Low-Speed USB and PS/2 Peripheral Controller." Jackpot. This was the USB interface chip, and in theory this is all I would need to connect the USB plug to. I found the spec sheet for the chip and found the four pins I needed, and double-checked the USB spec to make sure I connected it properly. To insulate and prevent any shorting, I covered the board by the connector with some electrical tape, and soldered the metal plug back in place. Using some small wires from Cat5E ethernet cable, I ran jumpers from the connector back to the USB chip. After some careful soldering, I was pretty thrilled to see that it worked when I plugged it into my PC! The device was recognized immediately, and I was able to move the mouse and use the buttons through the remote with no trouble.

With the receiver now working, I added some epoxy to the back of the board to strengthen the broken connection and fill in where the board was broken off. Lucky for us, the damage only affected the solder points for the plug and the structural part of the board for securing the plug. No traces were damaged, so I was able to bring it back to life with a little research and some careful fine-detail soldering. Now the receiver is working and has been re-assembled. The only signs of the repair are a couple wires visible through the hole for the indicator light.

Double Dose of the Twins VS The Royals

This weekend we hosted two friends from Kansas City: Beth's friend Jenny from college, and Megan, a friend of hers who is also a baseball fan. They made the road trip up to the cities to see us, and see their Kansas City Royals play the MN Twins of course. Friday night was a great game. We ended up with a group of 12 of us, many of which were other friends of Jenny's who came out to visit. There was plenty of action on the field, and the Twins ended up winning 7 to 5.

We enjoyed having house guests, and sharing the extra space in our house. Saturday we slept in and took it easy, and grabbed some lunch at Applebees. We had originally bought 5 tickets for Saturday night's game, but Jenny's husband didn't make it up to Minneapolis, so we invited Vinney to join us. Vinney and I left early and found some dinner at a cool little bar called Mortimer's where we savored some good cheap bar food. $2 special on cheeseburgers, some fries, and a cool Honeyweiss. The game was neck and neck for awhile as the Royals pretty much matched us run for run. Unfortunately this dragged out to a tie after 9 innings. Two innings later the Royals came back with 3 more runs to win the game. But at least we had good friends to hang out with... even if some of them were cheering for the wrong team :-)

Saturday, April 25, 2009

Taking care of some overdue house projects

This past week I've gotten the bug to work on some house projects that have been on our list for a long time. Now that the weather is warming up, the temperature in the attic isn't ice cold, and not yet blazing hot, which works well for me.

We've been doing our best to keep the upstairs bathroom ventilated as we started to see mold appearing on the wall behind the door many months ago. That was taken care of with some bleach and mold-resistant primer and paint. Now I have a new bathroom ventilation fan installed in the ceiling. I picked up a nice little 70 CFM fan from Menards. After locating the right position up in the attic, I hooked up the wiring and ducting, and mounted the unit in place, and fished the wiring down through the wall to the switch box in the bathroom. As of now, I have a working bathroom fan. The only step I have left is to vent the air out through the roof. Installing the vent is a project for another day though.

Since I was already working in the wall outside our bathroom, I took the opportunity to install a second light switch in our hallway. Previously, we had to walk all the way down a dark hallway to reach the light switch. With some careful measuring I was able to fish my wires down into the walls without making any extra holes in the wall, which was very nice. It took some time to sort out the plan for wiring, but I was able to make it work nicely. Now I have two switches on our hallway light. A small convenience, but well worth the effort.

Friday, April 10, 2009

Jamaica Recap

Well, we've been back home form Jamaica for almost a week now and the time off was wonderful. Beth and I got to spend 5 days in the warm sun on the beach, and see some of the sights of Negril, Jamaica.

Day 1 was our travel day. We left Minneapolis early Monday morning, flew to Memphis, and boarded our final flight to Montego Bay, Jamaica. Once we arrived they shuffled us through customs & immigration and out to the appropriate shuttle bus for Negril. We arrived late that afternoon at The Rooms in Negril. We had a nice big room with a balcony. After settling into our room we explored the beach, and ended up finding dinner at Margaritaville. Jerk Chicken pizza & Fajitas... yum! The sun set around 6:30 and we made it back to our room, and just relaxed the rest of the evening.

Day 2 was another relaxed day around our hotel. The continental breakfast was at our hotel's outdoor restaurant: fresh watermelon & pineapple, toast, muffin, and cereal. With a heavy dose of sunscreen we ventured out to the beach for some swimming in the ocean and just relaxing in the resort's lounge chairs. Beth read some books and I enjoyed some podcasts. Lunch was found at another restaurant down the beach, Jerk Chicken & Fries with some tasty suger-cane sweetened ketchup. That afternoon we met with our contact from the tour company. Kemeasha scheduled our return trip to the airport, and scheduled a couple tours for us for the next two days. After some more relaxing on the beach, we found dinner at another place down the beach, and watched the sunset from our table.

Day 3 started like the day before... a refreshing continental breakfast and a swim in the ocean, followed by relaxing in the lounge chairs in the shade of a palm tree. We got to see them knock down a few coconuts, too! We sampled some more of the 7-mile-beach dining options for lunch. I had some more jerk chicken, and Beth a tasty grilled cheese. Mid-afternoon we were picked up for our first (smaller) tour. Palmer was our driver, and we were picked up for a shopping & dinner trip around town. We met some nice couples from Delaware and Minnesota as well. The Time Square shopping center provided some nice souvenir shopping, and was not as high-pressure as the merchants on our beach. The next stop was the local craft market. The wood carvings were fun to look at, but beyond that, not much else resembled anything hand-made. Most of the 'shops' all had the same stuff for sale. Our final stop was Rick's Cafe, known for being the best spot for watching the sunset, as it's on the westernmost tip of Jamaica. However it was too cloudy for a good sunset, but we enjoyed some excellent dinner while we watched cliff divers jump into the ocean from the cliffs surrounding Rick's cafe. Beth pampered herself with some lobster, and I had a plate of steak, chicken, and red snapper. Once the sun set, we cleared out and hopped back on our bus and made the trip back to The Rooms.

Day 4 was our last full day, and our biggest tour. We woke up bright & early and were picked up by Palmer again, along with some of the same couples from the day before, and took off for the southern area of Jamaica. Our first stop was the Black River Safari. The smooth pontoon ride and fresh air was a welcome relief after a long bumpy bus ride to get there. We were brought up and down the river and saw Crocodiles, birds, Mangrove trees and more up close. Very interesting and fun. The next stop on the bus tour was the YS falls, a natural-spring-fed waterfall in the middle of a beautiful forest area. A short ride into the woods brought us to the falls. Beth and I got to jump in, catch our breath after hitting the cold water, and swim around while our guide took photos of us with our camera. It was very fun & refreshing. We also saw people sliding by on the zipline above us, having taken the "canopy tour." After drying off and looking at our photos, we hopped back on the bus and headed to the Appleton Estate Rum tour. A short drive through narrow mountain roads brought us to the Appleton Estate Rum factory. A tasty lunch was served with chicken stew, rice, and some cool rum punch. Our stomachs filled, we were taken around the plant to see how they make the rum from the sugar cane grown nearby. We were surrounded by the smell of molasses, and got to taste the product at various stages in the process... fresh -squeezed sugar cane juice, and "wet sugar" (sugar granules & molasses). At the end of the tour I sampled some rum, and we picked up a small bottle of a rum/cream liqueur. A long bus ride back and we enjoyed some dinner at our hotel's restaurant... Rasta Pasta for Beth and some more Jerk Chicken for me. I wanted to get a good overall sampling of the famous Jamaican dish after all.

Day 5 was our last day, and the trip home. Breakfast was delicious, and we made some time to walk on the beach and enjoy the water after we packed up our stuff. We hopped on our bus (driven by our favorite tour guide Palmer again) at about 10:00, and made the trip to the airport, picking up other travelers along the way. The airport process was slow and we cut it awfully close getting onto both of our flights home, but we made it home. We were stressed and hungry after a long travel day, but were glad to be home.

As our first "big" vacation. it was wonderful. We had just enough time to be away, had some fun, relaxed a lot, and enjoyed each other's company in a new place. So did we have a good time?

"Ya, mon!"

Friday, March 27, 2009

The Cabinet Completed and Moved-In

I'm happy to say the custom cabinet is done. After a lot of filling, sanding, priming, sanding, and more painting, it's finally done! I really like how it fits in with the rest of our white decor in the basement. We've taken advantage of the extra storage on the back, and our cords are neatly tucked away in the compartment on the back.



Monday, March 9, 2009

Not all paints are scented equally

On my last trip to Menards, I picked up a gallon of Dutch Boy's Cabinet & Trim paint for the new cabinet. After a lot of wood filler, sanding, and priming, the cabinet was ready for paint. I applied the first coat of paint to the entire cabinet, and the top sides of the shelves. I have to say I'm impressed with the tough, glossy finish from this paint. However, having inhaled the stuff for about 2 and a half hours, I had quite the headache. Whatever they put in that paint to make it extra durable smells a lot stronger than your typical interior wall paint. Our furnace in the next room picked up the scent and spread it throughout the house. By the time I finished my painting for the day we decided to open some windows to air out the house, and went out for awhile to get some fresh air.

So... for the rest of you. Paint in a well-ventilated area!

Thursday, February 26, 2009

Back in Business

I've officially re-launched an old online store of mine. Back in college I created and sold a do-it-yourself electronics kit. It was a small niche product for hobbyists who like to modify their computer case. For those of you who are curious about the finer details, you can check out the site at www.VUMeterKit.com

Since closing up shop in 2005 some things have changed which are making my life as a small store operator better.

PayPal has always had an easy to use "Add To Cart" button system. Now they can track your inventory as well. I only have a limited number of kits to sell, and I can set up my PayPal account to keep track of what's been sold and how many are left, and prevent me from selling when I run out. However I did learn a lesson on shipping pricing on PayPal. I hand't planned on doing international shipping at first, so I didn't set up a pricing scheme for international. To PayPal, apparently this means that international shipping is FREE. One of my first orders was from Canada and they got free shipping. So my oversight was their gain... but now I have some international pricing set up for next time.

The US Postal service's Click & Ship program is new to me as well. Back in the day I used to have to pack up all my shipments and wait in line at the Post Office to ship out my stuff. All I needed now was a digital postal scale. I found a nice non-USPS brand scale on eBay. This time around, I just weigh my package, print out postage, schedule a pickup, and it's done. Very nice. I can also order priority mail boxes delivered for free through the USPS, which is a great convenience. One thing I did stumble on was that my favorite PDF viewer, Foxit, is not compatible with the USPS click & ship program. The images they put on the postage label (barcodes, postmark, etc) do not display on the document when viewed or printed through Foxit. I had to switch to a computer with the standard Adobe Acrobat PDF viewer for this to work.

Pay attention to international shipping. It took me awhile to get it all straightened out, but there are VERY specific boxes I have to use in order to get the cheaper rates. A bit of a learning curve, but really not too bad now.

So far so good... I emailed my past customers about the new store and ended up selling a couple units. Now I just have to find some ways to promote the site.