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Everything posted by dcarch

  1. Sounds like you have pretty good idea what you can do for your situation. Couple of things to consider - Find a dimmer that you can control the lighting level. Also, a driver for your LEDs which will not interfere your digital camera (flickering). Setup your lights (double duty) on a track so that you can have your lime tree lit for 12 hours and your other plants on the other 12 hours. dcarch
  2. I don't know if there are published spectrum data for these COB chips other than "cool white" and "warm white". I have both, but mostly I use cool white. They seem to work well. I use them almost year round. In the winter for growing salads, and spring for starting seedlings. None has failed so far. In my setup, I use two chips per fixture. that's 300 watts total. That does generate a lot of heat. So a heavy duty heatsink and powerful fan is a must. 110V muffin fans are not powerful enough, You can find cheap used powerful 12vDC computer room rack fans on ebay (mine was $3.00 each). However, they are noisy, so I used a 12vDC power supply + an adjustable low voltage regulator(controller) to slow down the fans. I was lucky to have found (ebay) those heatsinks. Actually it was one huuuuge heatsink that I cut to size. I use two fans in case one fails. That would instantly fry the LED chips. Those half -round clear plastic round lenses work well to focus the chips (ebay). 300 watts of LED can light up your whole apartment. May be you can get by with 50W to 100W. You can buy them rather them making them. dcarch
  3. A follow up to what I posted before. After I removed the hydraulic jacks, I was able to force the fig branches from 36" to 10". This makes it possible to use 1 1/2" foam board for insulation. 1 1/2" Foam board is much better than burlap or blankets. also smaller surface area can minimized heat /cold conduction. Just in time for the forecast of record breaking cold wave coming in the next few hours. dcarch
  4. I have not tried this, but I think this will work. In a very noisy restaurant, you and your companion both use your cell phones with earphones to carrying on your conversation. The cell phones have noise cancelling microphones and you can whisper into the microphones, and in-ear earphones cut out all background noise. dcarch
  5. No need to. You can eat the rind. Very soft after cooked. dcarch
  6. Then use my method of safely cut hard squash into small pieces, using only one hand. That vedio is designed for people who has the use of only one hand. dcarch
  7. It can be easy and safe. ( yes really) If you have a long thin knife with a pointy tip. Stab the squash with the tip of the knife. You should be able to enter the squash with your knife. Then you just rock the knife seesaw fashion, the squash can be split without much effort. Or use a Chinese cleaver and a small hammer. dcarch
  8. Happy Halloween to all!
  9. dcarch

    Dinner 2019

    Thanks For The Memory After buying my house, I realized that the magnificence huge tree in the garden is a ginkgo tree. I Googled and amazed that ginkgo is a very interesting tree. It is a dinosaur tree that it has not change much in 200 million years. It is a very tough tree that actually survived the atomic blast in Hiroshima. In addition, I don’t remember where I have read it, ginkgo nuts supposedly can improve your memory. A very beautiful decorative golden fall tree. Every year this time, I harvest a ton of ginkgo nuts for cooking. dcarch SV pork, + carrot, sweet potatoes, ginkgo nuts from the garden
  10. dcarch

    Food funnies

    It took me a little while to get the clerk in the Chinese store to say "pRessure" cooker and not "pLeasure" cooker. I was looking for a replacement gasket. Actually, I like "pleasure cooker" better. I use it so often to make cooking easier dcarch
  11. If that tank is above ground, you may not need a pump. There should be enough hydro-static pressure. If that tank is to be under ground, you may already know that you may have to anchor it down to prevent flotation, just like the installation of gasoline tanks. dcarch
  12. dcarch

    Dinner 2019

    Cephalopolitics Hope this can get you to smile a little more for the weekend. :-) Squid on daikon from my garden
  13. I am assuming you are not one of those "Square Foot" gardener? dcarch
  14. "Raindrops Keep Fallin' On My Head --------- --------- It won't be long 'till happiness steps up to greet me" Installed 10 rain barrels. Not one drop of city tap water was used for my good size garden this year. Also, everything I have in the garden seems to be doing better than before. Might have something to do with no chlorine in soil? You can possibly get barrels for free. Check around. My system was free. dcarch
  15. Don't do this. Just thinking out loud for fun.' Freeze your phone, then pour jello on it. Jello will instantly solidify, no chance of entering the phone. dcarch
  16. Seems to be very dangerous to use to grate any hard food. Not trying to be gross, but ----- is it a Food file or foot file? dcarch
  17. I always butter the bread before toasting. dcarch
  18. Controlled adjustable motor vibrator is so cheap and so easy to make. For instance: Get a small computer "muffin" fan ($1.00 to $10?). They are small and flat and rated at 5VDC or12VDC. Many sizes to choose from. They are made of plastic. You can easily break off a few fan blades to make the rotation unbalanced. When it rotates it will vibrate. With a voltage regulator/controller, you can have the vibration adjusted to the exact jello wobble frequency. dcarch
  19. 1. Resonant vibration is very powerful. Many major structural failures, bridges, towers, etc. had been due to resonant movement. 2. Do not use vacuum on a cellphone. Vacuum can destroy the microphone's and speaker's very thin film diagram. Possible hazard with lithium battery's thin film electrodes dcarch
  20. dcarch

    Dinner 2019

    Crispy Peking duck, scallion, on steamed buns, I always call that duck burgers. dcarch
  21. This is what I would do: 1. buy a micro motor vibrator, they are very cheap less than a dollar. They are very tiny, size of a large pea. They run on 1.5v battery, draws very little power. 2. Get a variable resister (rheostat), or a low voltage controller, ( about a dollar). 3. a cheap non-functioning phone. 4. make your jello with everything in it except the battery and voltage controller, which will be wired to the vibrating motor hidden remotely. ---------------------------------------- The reason for this setup is because just like a violin, the jello will have a very specific vibrating frequency, with the adjustable motor rotation (vibration) synchronized , you will have the jello really dancing. (Note - all components can be purchased on ebay.) dcarch
  22. Tree form for fig trees in my zone 6 area will not work. It's impossible to wrap a tall tree for winter protection. All the branches will die off. That's why it's better in cold zones to train fig trees to grow into bush form. What I am doing is to force the thick base branches much tighter so I can provide better insulation. It seams to be working well. dcarch
  23. Looks more like a Baorangia to me. dcarch
  24. OK, in many areas and if you grow figs (What?!! You don't grow figs?!!), time is coming soon to have to wrap and winterize your fig trees. My fig trees have gown to be too big and too horizontal and getting very difficult to wrap. I am reshaping the trees using jacks from my shop. Each day I give each jack a little turn so that I don't crack and break the branches. I think I should be able to get all the branches to vertical and be able to wrap them to be less than 12 inches columns. Good winter protection means greater harvest next year. It fig ures. dcarch
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