25 Mei 2021 mencatatakn angka tertinggi kes positif baharu di Malaysia. Angka azimat itu yang harap harap tercatat (harap harap inilah yang paling tinggi – jangan ada lagi kenaikan) adalah 7,289!
Monthly Archives: May 2021
Sensor Kamera Terjangkit Fungus?!
OK Tajuknya agak menarik..kalau senosr kena fungus memang kos nak repair agak tinggi. Bergantung kepada tahap jangkitan, ada yang boleh diselamatkan dan ada juga yang dah RIP.
Tapi kalau anda punya skrin LCD mempunyai vignette seperti ini (lihat gambar 1). Ini bukanlah disebabkan oleh fungus….ia lebih kepada kerosakan LCD sebenarnya. Tak perlu dibuang kemaranya kerana kerosakan LCD ini mudah diperbaiki. Kos LCD baru RM90..dan cara pembaikannya amat mudah.
Gambar kedua pula adalah skrin lcd yang telah diperbaiki.
Gambar 3: Dalam proses replacement of LCD..saya beli di shoppe je order dari China . Kos total termasuk penghantaran adalah sekitar RM120.
UTM under Enhanced MCO
The Universiti Teknologi Malaysia was put in Enhanced Movement Controller Order today 21 May 2021 after Covid-19 confirmed positive cases exceed 40 cases. Please du’a that this pandemic will be over as soon as possible and please follow the SOP!
photo by Faris Ahmad, UTM
Linear Voltage Regulator
Linear Regulators
There are two main types of DC:DC power converters: Linear Regulators, and Switching Regulators. Linear regulators are relatively simple but are typically much less efficient than the more complex switching regulators. For either type of DC power converter, the inefficiency of power conversion is dissipated in the form of heat.
A linear regulator produces an output voltage derived from the input voltage through a transistor that is controlled by feedback. The output voltage is divided down and compared against a reference voltage with a comparator that drives the base of the transistor. Feedback is connected to the negative input of the comparator, because in that configuration the base of the transistor gets turned on when output voltage goes down making the transistor turn on more and reduce resistance between Vin and Vout.
In high-level terms a linear regulator is like a controller resistor. The current flowing in is essentially the same as the current flowing out, since the control circuitry draws a trivial amount of current compared to the current drawn by the power load. Like with all electronic components the power dissipated by the linear regulator is the voltage across it times the current through it. Dissipated power is also equal to the input power minus the output power by the Law of Conservation of Energy.
PV Leakage current
Leakage current berlaku di panel Solar kerana wujudnya capacitor parasit. Leakage current ini amat berbahay jika panel PV disentuh manusia