digital industrial timer

ANY Timer Switch
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Superior digital industrial timer On-line via Any Electronics Co., Ltd.
The organization specializes in providing electronic merchandise such as digital industrial timer, programmable timers, programmable digital timers, proximity switches, inductive linear sensors, photo-electronic switches, optical screen sensors, strong state relay, and switch energy provide, among other people. The consumer friendly web site aims to deliver excellent high quality at affordable rates to service seekers across the globe.
Located in China?¡¥s Liushi, Any Electronics is actually a business that prides itself on consistently adapting to technological improvement. The firm gives solutions in machinery manufacturing, motor technique manage, distribution transmission, handle device, oil and mining, automation industry, solar handle, lighting handle along with other such places. The enterprise also supplies new product improvement and OEM solutions. All services supplied are strictly based on ISO9002.

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Greg R asked How to build a timer which alternately flashes two sets (5 and 3) red LEDs and is variable to 80 flash/sec?

and have this coupleable to a controller which adjusts flash rate or pattern of the alternating 5 - 3 diode set. I am using a 12 volt premade automotive LED bulb. The two positive contacts on the bottom of the bulb power the two sets of LEDs. I want to figure out how to power the two sets alternately and to control the total flash rate accurately up to 80 fps by a computer. In a biofeedback set up recieving varius sensory inputs and using these according to a program adjust varius outputs such as this flasher. Manual over ride seamlessly too!

And got the following answer:

The parallel (printer) or serial port can be used to drive the LEDs through a transistor switch. You only need three wires from the port, two digital outs and a common/ground. For a low side switch - each digital output from the port goes to a transistor like the 2N2222 used as a switch. Connect the transistor through a 22K resistor from the I/O pin to its base, its emitter to ground, its collector to the LED (-) and the LED (+) to +12V supply. The Power supply (-) is connected to ground/common also. See Transistor Low Side Switch in the second link. You may also need a 22k pullup resistor for some printer port pins. This goes from the I/O pin to +5V. I expect this detail will be in the link below. It seems your lamp may be commoned (-12V) on the socket case, with the +12V goes to either of the pins, and the -12V to the socket case. This needs additional components to make a high side switch. The circuit in the diagram in the second link is not suitable. The diagram in the third link shows the conceptual difference between high and low side switches. However this is not directly suitable. Make it a P channel FET, connect the low side switch described above to the gate, and a resitor (10K) from the gate to +12V. You can use a PNP transistor for the switch too. Add a 10K resistor in series with the base. The emitter goes to +12V. I don't know what software you are using, but I have used VB6 and Windows XP with a 32 bit parallel port DLL to send bits to the parallel port. I expect you can find a driver on the internet that provides a DLL to get access to the parallel port which is likely to be faster. I have used this method, but not with Vista. See the first link below. With a serial port use RTS (pin 7) and the DTR (pin 4) lines. These can be accessed through the properties of the serial com port object in VB. I have used this method too. If your computer doesn't have these ports you are looking at buying a serial or LPT card (if you have suitable bus sockets inside) or USB adaptors for serial or LPT port. I have used USB/serial adaptors and found sometimes rapid command sequences don't work as expected, turning up out of sequence, but it does depend a little on the software, using statements like "do events" may help. VB.net I don't know. The problem is that windows PCs have moved away from these simple things in hardware and software. There are risks with USB adaptors that they are too slow because it is very messy software wise. If these methods don't work for you, buy a Data Acquisition System (DAS) or I/O module, with digital I/O, as you seem to need one anyway, to get the sensory inputs. You can buy cards/modules that work off internal bus or USB. These have analogue inputs, timers and digital I/O port for what you need. They also have software drivers - make sure the drivers will work with whatever software you use for software development. Most use a DLL software interface with function calls. I think this is enough for now. You need to ask more questions once you have determined what to do. This is as much a software issue as a hardware one, but you could always go back to an older computer and operating system and software development system if you have one lying around. Windows XP with VB6 and serial ports and parallel ports will work fine. Modern PCs have no bus, only USB, unless you buy more expensive industrial or server types. Seamless manual override - that is best done by software and a virtual slider or something on screen. If you want a hardware knob it would be read as an analogue input through the software. If it is to be independant of software??? Gets expensive no end. Edit: Added a link showing circuit of high and low side switches. Search on the page for "Switch a 1 A, 10 V Load That Always Stays Connected to Ground".

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Service seekers are able to view the solutions either in line with the Solution Categories supplied or the newest Items or perhaps Function Goods. The newest merchandise incorporate such things as Holiday Time Switch ATP 1006-5, Strong State Relay SSR3, digital industrial timer, and Preset Counter AH5K. There is certainly also the choice for buyers to view specific goods with all the search engine supplied around the website.
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The business caters to countries around the globe. Its clientele incorporates 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 internet site states that the explanation behind its worldwide achievement could be the exceptional high-quality of its electronic things. Furthermore, the cost quotations presented are reasonable in regard to the superior value of its services.

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