This document lists the parts needed to build an LED pattern flasher circuit using a 555 timer, 4017 counter, 2N2222A transistors, and a variable resistor ranging from 0 to 100kΩ. The parts list includes 9 LEDs (6 red and 3 yellow), resistors, transistors, ICs, switches, and capacitors. The circuit designer and date are also included at the bottom.
Al Buraq Electric & Tools L.L.C ---- Your All in One Destination
In 2004, when Al Buraq Hardware & Tools was started as a small family-owned business, we made a commitment to provide working people with great quality tools at the lowest prices. And for over 10 years, Al Buraq Hardware & Tools has done just that. From hand tools and generators, to air and power tools, from shop equipment to automotive tools, Al Buraq offers more than 20,000 tools and accessories at quality levels that match or exceed competing brands.
We buy directly from the factories and we sell directly to you to enjoy the savings and the very high quality standards products.
Now Al Buraq Hardware & Tools L.L.C in the UAE is following the guidance of HH Sheikh Mohamed Bin Rashed Al Maktoom to move Dubai Government to a smart Government we decided to have our E-SHOWROOM where the client can enjoy preparing the LPO directly from our website using his username and password.
What do we have in our E-SHOWROOM?
- Electrical Safety Products: industrial safety helmet for linemen, safety helmet for linemen with short visor, safety helmet with integrated face screen for electricians, Electrician face shield with headband and brow-guard, Arc-Flash protective face shield, helmet for use in the forestry industry, safety cap, glasses, headgears, safety shoes, safety boots, insulating mats, work gears, high-visibility garments, rain protection, climbing equipment, harnesses, energy absorbers, fall arresters, anchorage, connectors, lanyards, sets, rescue devices, latex gloves, composite chlorinated gloves, leather gloves, handling leather gloves, preliminary identification of cables and phases, no-voltage testing / absence of voltage testing, earthing and short-circuiting, earthing stickes, insulating tools 1000 V, cable cutters, shunt, repowering, network controlling and measuring equipment, substation equipment, (FAMECA, Sibille Safe, Jegou industries, Technowill)
sales@alburaqtools.ae
Device designed to test for the absence of voltage on HV systems up to 735 KV.
Its use is particularly recommended for voltages over 400 KV.
Indication of the absence of voltage and correct operation of the device by a green LED.
Self-test device.
Can be used in all weathers.
IEC 61243-1
This original configuration gives it very it very high performances, especially in the case of high RF induction and/or parasitic electric fields.
Mains frequency range : ; 50 or 60 Hz
Very sturdy polycarbonate casing.
Electronic cut-out if battery under threshold voltage of 8V.
Temperature range : from -25°C to +55°C
Power supply : one 9V alkaline battery.
Device comes in a metal case with hooks Ø 60 and 120mm and straight electrode 100mm.
IEC 61243-1 above 50kV to 780 kV
Temperature range : from -25°C to +55°C
Permanent standby, auto wake up
Sound and light indication
Single-Diode Model with Rs Temperature DependenceKyumin Lee
PVsyst 6, arguably the most popular PV modeling software in the industry, includes a temperature coefficient for the ideality factor in the single-diode model for PV modules. Multi-temperature and multi-irradiance I-V data from IEC 61853-1 tests on silicon modules, however, reveal no significant temperature dependence of the ideality factor. The series resistance shows a stronger temperature dependence, but this behavior is currently not captured by the PVsyst 6 module performance model. It is shown that, once the temperature dependence of the series resistance is included, the single-diode model can reproduce I-V curve point values Voc, Imp, and Vmp with greater accuracy.
The electrical power system in offshore oil & gas installation, consists of a large
distribution network, generally operating in island mode i.e., without grid support. For a compact
utility plate form design, multiple gas turbine-generators without generator transformers, feed
directly to 11kV switchgear. Such a configuration however, introduces high capacitive charging
current (Ico), which is more than the preferred high resistance grounding of generator neutral
through 10A, 10sec resistor, to safeguard the generator core from damage during an earth fault.
Therefore, some utility prefers to select low resistance grounding to limit the fault current above
Ico; however this can cause severe damage to generator core. Generally, oil & gas installation is a
customized design. So, earthing scheme of 11kV generating utility system should be selected
judiciously at basic engineering stage to avoid equipment damage and protection mal-operation
during operation. Different methods of earthing scheme are available to mitigate the same. One of
the method is presented here in which generator neutral is connected to high resistance grounding
and 11kV switchgear connected to low resistance grounding though zig-zag transformer, subject to
single grounding operation at a time. Prior to synchronization or under complete load throw
scenario, generator circuit breaker is opened. So, an earth fault in generator or evacuation system,
create over-voltage or ferro-resonance conditions, stressing insulation of generator and associated
system. This is mitigated by putting neutral earthing resistor into service at generator neutral. This
paper presents the experience learned in designing neutral earthing scheme for off-shore utility
plant in view of high capacitive charging current at 11kV voltage level, outlines impact on stator
core damage, mitigation and conclusion
Al Buraq Electric & Tools L.L.C ---- Your All in One Destination
In 2004, when Al Buraq Hardware & Tools was started as a small family-owned business, we made a commitment to provide working people with great quality tools at the lowest prices. And for over 10 years, Al Buraq Hardware & Tools has done just that. From hand tools and generators, to air and power tools, from shop equipment to automotive tools, Al Buraq offers more than 20,000 tools and accessories at quality levels that match or exceed competing brands.
We buy directly from the factories and we sell directly to you to enjoy the savings and the very high quality standards products.
Now Al Buraq Hardware & Tools L.L.C in the UAE is following the guidance of HH Sheikh Mohamed Bin Rashed Al Maktoom to move Dubai Government to a smart Government we decided to have our E-SHOWROOM where the client can enjoy preparing the LPO directly from our website using his username and password.
What do we have in our E-SHOWROOM?
- Electrical Safety Products: industrial safety helmet for linemen, safety helmet for linemen with short visor, safety helmet with integrated face screen for electricians, Electrician face shield with headband and brow-guard, Arc-Flash protective face shield, helmet for use in the forestry industry, safety cap, glasses, headgears, safety shoes, safety boots, insulating mats, work gears, high-visibility garments, rain protection, climbing equipment, harnesses, energy absorbers, fall arresters, anchorage, connectors, lanyards, sets, rescue devices, latex gloves, composite chlorinated gloves, leather gloves, handling leather gloves, preliminary identification of cables and phases, no-voltage testing / absence of voltage testing, earthing and short-circuiting, earthing stickes, insulating tools 1000 V, cable cutters, shunt, repowering, network controlling and measuring equipment, substation equipment, (FAMECA, Sibille Safe, Jegou industries, Technowill)
sales@alburaqtools.ae
Device designed to test for the absence of voltage on HV systems up to 735 KV.
Its use is particularly recommended for voltages over 400 KV.
Indication of the absence of voltage and correct operation of the device by a green LED.
Self-test device.
Can be used in all weathers.
IEC 61243-1
This original configuration gives it very it very high performances, especially in the case of high RF induction and/or parasitic electric fields.
Mains frequency range : ; 50 or 60 Hz
Very sturdy polycarbonate casing.
Electronic cut-out if battery under threshold voltage of 8V.
Temperature range : from -25°C to +55°C
Power supply : one 9V alkaline battery.
Device comes in a metal case with hooks Ø 60 and 120mm and straight electrode 100mm.
IEC 61243-1 above 50kV to 780 kV
Temperature range : from -25°C to +55°C
Permanent standby, auto wake up
Sound and light indication
Single-Diode Model with Rs Temperature DependenceKyumin Lee
PVsyst 6, arguably the most popular PV modeling software in the industry, includes a temperature coefficient for the ideality factor in the single-diode model for PV modules. Multi-temperature and multi-irradiance I-V data from IEC 61853-1 tests on silicon modules, however, reveal no significant temperature dependence of the ideality factor. The series resistance shows a stronger temperature dependence, but this behavior is currently not captured by the PVsyst 6 module performance model. It is shown that, once the temperature dependence of the series resistance is included, the single-diode model can reproduce I-V curve point values Voc, Imp, and Vmp with greater accuracy.
The electrical power system in offshore oil & gas installation, consists of a large
distribution network, generally operating in island mode i.e., without grid support. For a compact
utility plate form design, multiple gas turbine-generators without generator transformers, feed
directly to 11kV switchgear. Such a configuration however, introduces high capacitive charging
current (Ico), which is more than the preferred high resistance grounding of generator neutral
through 10A, 10sec resistor, to safeguard the generator core from damage during an earth fault.
Therefore, some utility prefers to select low resistance grounding to limit the fault current above
Ico; however this can cause severe damage to generator core. Generally, oil & gas installation is a
customized design. So, earthing scheme of 11kV generating utility system should be selected
judiciously at basic engineering stage to avoid equipment damage and protection mal-operation
during operation. Different methods of earthing scheme are available to mitigate the same. One of
the method is presented here in which generator neutral is connected to high resistance grounding
and 11kV switchgear connected to low resistance grounding though zig-zag transformer, subject to
single grounding operation at a time. Prior to synchronization or under complete load throw
scenario, generator circuit breaker is opened. So, an earth fault in generator or evacuation system,
create over-voltage or ferro-resonance conditions, stressing insulation of generator and associated
system. This is mitigated by putting neutral earthing resistor into service at generator neutral. This
paper presents the experience learned in designing neutral earthing scheme for off-shore utility
plant in view of high capacitive charging current at 11kV voltage level, outlines impact on stator
core damage, mitigation and conclusion
5-Star User Experience: What Going Out To Eat Teaches Us About UX DesignJimmy Chandler
Presented at edUI November 10, 2015 and New York Code + Design Academy November 18, 2015.
Are you hungry for a fresh perspective on UX design? In this fun and interactive presentation, we will step outside the confines of our digital devices and explore how great restaurants meet their customers’ needs (and how other restaurants fail to do so). Looking at the principles of restaurant hospitality, we’ll discover how these principles apply to building better websites and mobile apps. We’ll discuss what great restauranteurs and great designers have in common, and we’ll generate some user experience best practices that participants can apply to existing and future designs. We’ll connect these ideas to what we know about how the human brain works and how our emotions impact our decision-making, and how we can go beyond meeting basic needs to delighting our audiences.
What You'll Learn:
- The importance of empathy and insight in design
- How to think about experiences as a series of events that can be stressful or pleasurable
- Ways to delight your users
5-Star User Experience: What Going Out To Eat Teaches Us About UX DesignJimmy Chandler
Presented at edUI November 10, 2015 and New York Code + Design Academy November 18, 2015.
Are you hungry for a fresh perspective on UX design? In this fun and interactive presentation, we will step outside the confines of our digital devices and explore how great restaurants meet their customers’ needs (and how other restaurants fail to do so). Looking at the principles of restaurant hospitality, we’ll discover how these principles apply to building better websites and mobile apps. We’ll discuss what great restauranteurs and great designers have in common, and we’ll generate some user experience best practices that participants can apply to existing and future designs. We’ll connect these ideas to what we know about how the human brain works and how our emotions impact our decision-making, and how we can go beyond meeting basic needs to delighting our audiences.
What You'll Learn:
- The importance of empathy and insight in design
- How to think about experiences as a series of events that can be stressful or pleasurable
- Ways to delight your users
