Superior digital timer switch for lights On the net through Any Electronics Co., Ltd.
The company specializes in giving electronic goods for instance digital timer switch for lights, programmable timers, programmable digital timers, proximity switches, inductive linear sensors, photo-electronic switches, optical screen sensors, solid state relay, and switch power provide, amongst other individuals. The consumer friendly site aims to deliver fantastic high quality at cost-effective prices to service seekers across the globe.
Located in China?¡¥s Liushi, Any Electronics can be a organization that prides itself on frequently adapting to technological improvement. The enterprise gives services in machinery manufacturing, motor method handle, distribution transmission, handle device, oil and mining, automation market, solar control, lighting manage as well as other such regions. The company also supplies new product development and OEM services. All solutions supplied are strictly in line with ISO9002.
Superior digital timer switch for lights On the net through Any Electronics Co., Ltd.
The organization specializes in providing electronic goods like digital timer switch for lights, programmable timers, programmable digital timers, proximity switches, inductive linear sensors, photo-electronic switches, optical screen sensors, solid state relay, and switch energy supply, among others. The customer friendly site aims to deliver superb good quality at cost-effective prices to service seekers across the globe.
Located in China?¡¥s Liushi, Any Electronics is really a business that prides itself on constantly adapting to technological improvement. The enterprise supplies solutions in machinery manufacturing, motor program control, distribution transmission, handle device, oil and mining, automation industry, solar manage, lighting manage and also other such regions. The corporation also supplies new item development and OEM services. All solutions presented are strictly in accordance with ISO9002.
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I need to design a system that produces a time cycle of 10 Seconds,but theres a restriction.I cannot use a microcontroller,only timers and counters...but my problem is that timers are very inaccurate..also is there a way of ensuring that what works on you simulation also works on your actual design?
And got the following answer:
A 555 timer is not inaccurate, it is around 1 in 100000 error, plus any change that might happen in the components. A 10 second time is a little long, and electrolytic or tantalum capacitors should be avoided. Also hi-K ceramic capacitors and cheap carbon resistors. However metal film resistors are 50ppm per degree C temperature change, or better. Also chose capacitors with low temperature co-efficient and low dielectric absorption. It can be used as a faster (more accurate) clock with say 1 second or so with a simple digital counter chip like the 4017 (decade counter) to get around 10 seconds. With the same proviso on components, an op-amp with low bias current can be used for longer times. See the LT1012 for an example. Use a precision voltage reference to drive an integrator and a precision voltage comparator. When it comes to analogue components the simulator may not model capacitors very well with parameters like dielectric absorption. Also a simulation needs to be done at different temperatures, assuming the components are able to have temperature coefficients, and different voltages. These are the two most likely causes of changes. Another is aging. Adjustment trimmers may be another error source, as they are less stable in general, when compared to fixed components. To get accurate results using a timer, some sort of calibration procedure is needed, and this may well turn out to be the biggest error. A 4060 IC has a RC oscillator and divider chain. There are various timer ICs other than the 555 which work in different ways, but these might not be readily available. Analogue wall clocks use a tuning fork crystal oscillator at 2^15 Hz = 32767 Hz. This is accurate to around 1:100,000 usually. A counter circuit divides by 2^15 to produce 1 second pulses. These drive the stepper motor. However they could be used to drive a 4017 counter to get up to 10 seconds, or other counters for different times, just as with the 555 timer circuit mentioned above. You could look these things up, search images for "op-amp timer circuit for example". The link below is an example of an op-amp timer circuit, with a second input that integrates the light received from a photo-diode. Change the capacitors and resistors for different voltages and times. Use an LT1012, or maybe an LM308 or LT1055/6, LF355/6 or LF411 (for low bias current). Ignore the 300K resistor and 680pF capacitor. With a 10 megohm input resistor, a 1uF timing capacitor and a 1V reference it will ramp at a rate of 1V in 10 seconds, and so trip at 1V in 10 seconds after a reset. You might need to implement a voltage controlled switch for the reset in a simulation, and figure out a way to do this in hardware too (a relay maybe?). There are diodes shown in the circuit that are to provide reference voltages (2CP12 and 2CV I think), replace then with accurate reference diodes. There could be an advantage in using the same voltage reference too, so the two reference track. Look up voltage comparator, schmidt trigger, op-amp integrator for more info.
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The web site sports an comprehensive catalogue showcasing its merchandise. Together with quite a few descriptive photographs the catalogue incorporates item particulars such as solution size, installation info, and product functionality data.
The web-site also functions a video section with tutorials that specifically clarify the digital timer switch for lights a variety of electronic products that the enterprise specializes in.
Service seekers are in a position to view the solutions either as outlined by the Solution Categories supplied or the latest Solutions or even Feature Items. The newest items include such items as Vacation Time Switch ATP 1006-5, Solid State Relay SSR3, digital timer switch for lights, and Preset Counter AH5K. There’s also the selection for consumers to view precise merchandise with the search engine provided around the website.
The Any Electronics enterprise web-site also showcases a weblog for consumers to acquire a complete understanding on the electronic items provided.
Any Electronics is geared to offering its customers using the very best attainable service with regards to value for value. In regard to consumer care service the web-site delivers a Skype service exactly where customers are capable to speak to appropriate consultants to clarify any queries. There is also a type offered around the website exactly where service seekers can fill in any queries they might have or feedback they may prefer to give.
The firm caters to nations all over the world. Its clientele contains countries in the USA, Europe, South East Asia, and Southern Africa. Any Electronics Co., Ltd. also functions as an agent for Temperature timers in Taiwan. The web page states that the cause behind its international achievement could be the great high quality of its electronic items. Moreover, the cost quotations presented are reasonable in regard for the superior value of its services.