Superior analog timer On-line through Any Electronics Co., Ltd.
The corporation specializes in giving electronic items for example analog timer, programmable timers, programmable digital timers, proximity switches, inductive linear sensors, photo-electronic switches, optical screen sensors, strong state relay, and switch power supply, among other individuals. The client friendly internet site aims to deliver outstanding high quality at cost-effective prices to service seekers across the globe.
Located in China?¡¥s Liushi, Any Electronics can be a corporation that prides itself on frequently adapting to technological improvement. The corporation gives services in machinery manufacturing, motor system control, distribution transmission, handle device, oil and mining, automation market, solar manage, lighting manage and other such locations. The enterprise also supplies new solution improvement and OEM solutions. All solutions provided are strictly based on ISO9002.
Superior analog timer On the net through Any Electronics Co., Ltd.
The enterprise specializes in providing electronic products including analog timer, programmable timers, programmable digital timers, proximity switches, inductive linear sensors, photo-electronic switches, optical screen sensors, solid state relay, and switch power supply, amongst other folks. The buyer friendly web-site aims to deliver fantastic top quality at economical costs to service seekers across the globe.
Located in China?¡¥s Liushi, Any Electronics is usually a corporation that prides itself on continually adapting to technological development. The company supplies services in machinery manufacturing, motor program manage, distribution transmission, control device, oil and mining, automation business, solar control, lighting handle as well as other such regions. The company also supplies new product improvement and OEM services. All solutions provided are strictly as outlined by 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.
The internet site sports an comprehensive catalogue showcasing its merchandise. Together with a variety of descriptive photographs the catalogue includes solution facts like item size, installation information, and solution functionality facts.
The internet site also attributes a video section with tutorials that especially clarify the analog timer various electronic items that the business specializes in.
Service seekers are able to view the merchandise either based on the Solution Categories offered or the latest Products and even Feature Merchandise. The latest items include things like such things as Vacation Time Switch ATP 1006-5, Solid State Relay SSR3, analog timer, and Preset Counter AH5K. There’s also the choice for consumers to view specific products using the search engine supplied on the web page.
The Any Electronics enterprise website also showcases a blog for shoppers to acquire a comprehensive understanding with the electronic merchandise offered.
Any Electronics is geared to delivering its buyers together with the best probable service when it comes to worth for price tag. In regard to customer care service the web-site delivers a Skype service exactly where consumers are capable to speak to suitable consultants to clarify any questions. There’s also a kind offered around the web-site where service seekers can fill in any queries they might have or feedback they may like to offer you.
The business caters to nations around the globe. Its clientele includes 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 website states that the cause behind its international success could be the superb top quality of its electronic products. Furthermore, the price quotations offered are reasonable in regard for the superior value of its solutions.
The website sports an in depth catalogue showcasing its merchandise. Along with many descriptive photographs the catalogue includes product particulars including solution size, installation info, and solution functionality facts.
The website also characteristics a video section with tutorials that particularly clarify the analog timer different electronic items that the company specializes in.
Service seekers are in a position to view the products either in line with the Item Categories provided or the latest Merchandise or even Feature Goods. The most recent goods involve such things as Vacation Time Switch ATP 1006-5, Strong State Relay SSR3, analog timer, and Preset Counter AH5K. There is certainly also the choice for customers to view certain merchandise using the search engine supplied on the site.
The Any Electronics enterprise site also showcases a blog for clients to get a complete understanding in the electronic goods offered.
Any Electronics is geared to delivering its clients with the best probable service with regards to worth for price tag. In regard to consumer care service the web site provides a Skype service where consumers are able to speak to acceptable consultants to clarify any concerns. There’s also a form supplied around the web site where service seekers can fill in any queries they may have or feedback they might like to provide.
The enterprise caters to countries all over the world. Its clientele contains nations from the USA, Europe, South East Asia, and Southern Africa. Any Electronics Co., Ltd. also functions as an agent for Temperature timers in Taiwan. The website states that the cause behind its worldwide good results is the outstanding high-quality of its electronic things. Furthermore, the cost quotations supplied are affordable in regard to the superior value of its services.