In many motivational speeches and self improvement articles. We see there emphasis on doing something we are passionate on.
The saying goes that doing something you liked and you will not work another day.
It is always these passion thingy that we need to first finds out. What are things that is our real passionate about.
Situation : Being the de facto solution provider to this customer. Everything is tie back to My company. From procurement, to delivery, maintenance and running of the whole IT. There is this mega project to tech refresh switches in the customer site. Started 2 years back. at that time, many existing switches were still new and under warranty. Decision was made not to include them in the refresh. 2 years has since past, these “new” switches are now “old”. And since customer did not planned purchase warranty for these switches, conveniently point to us to also tech refresh these equipment.
Response : Been in the environment long enough, I see what is coming. basically no way out, I got angry knowing that I’ll be on the loosing end, both from customer perspective and from internal management perspective.
Retrospection : Problem started 2 years back. Insufficient written documentation and signoff before we move forward to next phase. Every step is in a rush, we’re being too accommodative. For good or for bad, agreement should be documented and not just verbal. This is proper Project Management. Customer is always right and they are now haunting us.
Command line method of creating objects and rules for checkpoint firewall
Syntax is very raw. It support only creation of rules at back of policy.
Require lots of manual checking and verification.
Python Expect. Way to go for automating network management. Script everything out
Left my pair of 150W solar panel idling, charging the sets of SLA batteries for past few months. Not really doing much work.
Came across this from a friend’s sharing of Carousell post. Solar Grid Tie Systems 800w (Full Set) for $2400 Sparks me to dig deeper into what Grid Tie Inverter really is.. End up it is a MPPT device that convert Solar DC direct to AC and pushes power direct to my homes power line. It takes batteries out of the equation, which is very neat.
located this Grid Tie Inverter from Tao Bao.
太阳能 并网逆变器 光伏逆变器 Inverter 500W 送MC4接头一对. Set me back ~$130 plus shipping.
Gotten this power meter too. ~$10
I have now modified and connect the pair of 150W Solar panel through this Grid Tie Inverter to my home power line.
It is pushing 150W max with good sun shinning on it. The yield is not great as I’ve only ~3hours direct sun on the panel everyday. Less then 0.5 kWh / day of use.
I did a cross check on SingPower electricity tariff which is now $0.18/kWH. I’m pulling less then 2kWH from the panel in 1 week. At this rate, my setup is not going to let me recovery my investment.
I NEED MORE SUN. Am now thinking should I move the panels towards the railing for more sun.
Did a small experiment with my kid. Using Lemon to light up a LED. Using 5c coins (copper) and Nails (zinc) as the cathode and anode. Single Lemon giving out 0.9V, insufficient to light up a LED that require 2.5V min. solution is to cut the lemon in 3, connect them up in series. 🙂
This is my setup. Over ambitions from the start.
From the start, the objective is to experiment with indoor farming with Hydroponics and growth lights, to learn as much about the technology. If successful, will do the sums and explore making it my 2nd career as a Urban Farmer.
The idea came from various articles such as this and this.
I’ve this recess underneath my bed room. Providing a good shelter from the element and space for the experiment growth.
The setup consist of 2x 150W Solar Panels charging 10x 7.2AH batteries through a MPPT solar charge controller. I’ve west sun in this location with about 3 hours of direct sunlight.
The power harvested from the sun is use to power 5m of LED growth light, water pump for irrigation and air-stone. Lights and water are controlled with timer.
The actual production area – Growth bed – is able to hold 2 x9 net-pots, with LED growth light over head. Height of growth light is adjustable. This setup is able to expand further to 4x 9 net-pots.
11 Oct 2015 – Started my 3rd crop today. This time round 1 prepared the water used for germination. Having EC 774 and pH 6.38
The EC level changes with Temperature, was about 1000 when I set it up. Changes when temp drop. 2 seeds each in the growth medium. Will monitor the progress.
17 Oct 2015 (Day6) – Sprouting.
Started 2nd attempt of hydroponics on 24 Sept 2015
24 Sept 2015 – Germinating seeds with “Diamond Water”
27/28 Sept 2015, Looks good.
30th Sep 2015 – Looks kinda leggy. Could be lack of sunlight during this period of Haze.
3 Oct 2015 – transplant over to netpot. Plant is not as big as I like, did this hoping that plant can get correct nutrient and lights.
4 Oct 2015 – This is how it look like after one day. Look at the size of 3rd leaves compare to the day before. I’ve adjusted growth light to provide lights from 07:00 to 13:00, 6 hours of lights.
Set this growth area with space for 18 netpots. Managed to get 12 reasonable sprout. Lets see how this go. I’ve got my growth light hanging where I can adjust its distance from the plant.
Getting the nutrient right is tricky, adding 50ml of A/B solution to 10 littles of “Diamond water”. I got a EC about 2.3 and pH 3.3
It’s too acidic. I’ve added “Backing Soda” to up the pH to around 6.1. Nutrient concentration wise, I added 4 more little of “Diamond water”. Solution settled down at EC of 1.965 and pH 6.55.
Learning from this, we should adjust EC before pH.
5th Oct – growing, didn’t expect the shoots to sprout out in the 2nd photo. Which one should I trim off.
6th Oct – grown a bit, not much
7th Oct – growing
17 Oct – Plant on 1st row is growing pretty well, not so for those on 2nd row. 1st row has exposure to direct sunlight. I’ve extended the growth light to 8 hours – 7am – 3pm, lets observe.
18-19 Oct – it can grow pretty fast. Look at the centre leave. This is how much it grow in one day.
