Superior solid state time delay relay On the internet by means of Any Electronics Co., Ltd.
The business specializes in providing electronic goods for instance solid state time delay relay, 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 people. The client friendly website aims to deliver exceptional top quality at affordable rates to service seekers across the globe.
Located in China?¡¥s Liushi, Any Electronics is actually a corporation that prides itself on consistently adapting to technological development. The company offers solutions in machinery manufacturing, motor technique control, distribution transmission, handle device, oil and mining, automation industry, solar handle, lighting handle along with other such locations. The firm also supplies new solution improvement and OEM solutions. All services offered are strictly in accordance with ISO9002.
Superior solid state time delay relay Online by means of Any Electronics Co., Ltd.
The organization specializes in offering electronic products such as solid state time delay relay, programmable timers, programmable digital timers, proximity switches, inductive linear sensors, photo-electronic switches, optical screen sensors, solid state relay, and switch power supply, among other individuals. The customer friendly web site aims to provide superb high quality at very affordable prices to service seekers across the globe.
Located in China?¡¥s Liushi, Any Electronics can be a enterprise that prides itself on frequently adapting to technological improvement. The corporation delivers services in machinery manufacturing, motor program manage, distribution transmission, handle device, oil and mining, automation sector, solar handle, lighting handle and other such locations. The corporation also supplies new product development and OEM solutions. All services provided are strictly in accordance with ISO9002.
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I'm holding a relay coil shut with a 12VDC / 500ma transformer (wall wort). The output of the relay is connected to a normally closed zone in my alarm system. I use this to tell me if the power has gone off while I'm not at home. However, with the transformer and relay only, I get no "power off" delay before the zone goes into alarm. Ideally, I'd like to get about a 30-60 second delay so that it won't go into alarm for short power outages. I don't have any way to do this through the alarm panel, so I need an electronic solution. I'm aware of a device which already does this (http://www.smarthome.com/7154.html) but I think I can do it cheaper with a capacitor (2, 3 .. ?) and a bleed resistor. Does anyone know the math and/or can you provide an answer to what size caps I need?
And got the following answer:
Trying to answer but YA taking breather. Or is it??? Edit: No it just doesn't want to display my answer. Try again... I may be reading your question wrong, but it looks like you want to charge the capacitor from the power supply, in such a way that if the power goes off the voltage on the capacitor will hold the relay closed for 30-60 seconds, until the capacitor discharges. That would work, but it is clunky, and you will need a big capacitor. Assuming that the relay will continue to hold closed until the voltage drops to about 60% of normal, C = 2 * T / R where R = the coil resistance of the relay Let's say you have a very small, low power relay with coil resistance 1200 ohms. For 30 seconds: C = 60 / 1200 = 0.05F = 50,000uF You would probably go for an aluminium electrolytic cap 47,000 uF, 16V. If your relay has a lower resistance coil, which it probably does, you will need a bigger capacitor, or several in parallel. You may need to charge the cap through a rectifier diode like 1N4001, so that when the power fails it doesn't discharge back through the power supply. The way I would do it is to use a darlington transistor, FET or solid-state relay to switch the line. Then you can do the same thing but with a much smaller capacitor, and you can run it from a battery or power direct from mains through a capacitor / rectifier circuit. Don't try that latter idea unless you know what I'm talking about, it's very easy to kill yourself...
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The internet site sports an comprehensive catalogue showcasing its solutions. In addition to a number of descriptive photographs the catalogue consists of item specifics for example item size, installation details, and product functionality facts.
The internet site also functions a video section with tutorials that specifically clarify the solid state time delay relay various electronic goods that the business specializes in.
Service seekers are capable to view the goods either as outlined by the Item Categories offered or the latest Goods or even Function Goods. The most recent solutions contain such things as Vacation Time Switch ATP 1006-5, Strong State Relay SSR3, solid state time delay relay, and Preset Counter AH5K. There’s also the alternative for consumers to view specific solutions using the search engine provided on the website.
The Any Electronics company web page also showcases a weblog for clients to obtain a extensive understanding of the electronic goods offered.
Any Electronics is geared to supplying its shoppers with all the greatest probable service with regards to value for cost. In regard to customer care service the website gives a Skype service where clients are in a position to speak to proper consultants to clarify any questions. There’s also a kind supplied around the internet site where service seekers can fill in any queries they might have or feedback they may like to offer.
The firm caters to nations all over the world. Its clientele involves 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 site states that the reason behind its global good results is the outstanding high-quality of its electronic products. Additionally, the cost quotations presented are affordable in regard for the superior value of its services.