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programmable

Programmable calculators are calculators that can automatically carry out a sequence of operations under control of a stored program, much like a computer. The first programmable calculators such as the IBM CPC used punched cards or other media for program storage. Hand-held electronic calculators store programs on magnetic strips, removable read-only memory cartridges, flash memory, or in battery-backed read/write memory.
Since the early 1990s, most of these flexible handheld units belong to the class of graphing calculators. Before the mass-manufacture of inexpensive dot-matrix LCDs, however, programmable calculators usually featured a one-line numeric or alphanumeric display. The Big Four manufacturers of programmable calculators are Casio, Hewlett-Packard, Sharp, and Texas Instruments. All of the above have also made pocket computers in the past, especially Casio and Sharp.
Many calculators of this type are monochrome LCD, some are four-color (red or orange, green, blue, and black), or, in the case of some machines at the top of the line as of January 2022 color similar to monitors displaying 16 or 32-bit graphics. As they are used for graphing functions, the screens of these machines are pixel-addressable. Some have a touch screen, buzzers or other sound producers, internal clocks, modems or other connectivity devices including IrDA transceivers, several types of ports for peripherals like printers, and ports for memory cards of a number of types.

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  1. A

    Programmable thermostats

    Hello, I was wondering if anyone could explain a little more on how these work please. As i understand it you can use them to set specific temperatures for different times of the day. Do you have to have the programmer constantly on? Are they suitable for all types of heating systems? How...
  2. P

    wiring a boss therm programmable room stat to a worcester combi

    can anyone give me some advice.I have a boss therm programmable room stat and i want to wire it up to a worcester 30 cdi combi.on the boiler there are three connections LS ,LR and NS but on the programmer it has LX ,L1 and L2 can anyone help ..thanks
    • pdl65
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    • boss combi programmable programmable room stat room stat wiring worcester
    • Replies: 0
    • Forum: Plumbing Jobs | The Job-board
  3. GQuigley67

    Danfoss Programmable Room Stat

    got a danfos programmable room stat to install, i usually do honeywells and find their MIs better to understand so struggling a bit with wiring it dont do much anymore as i work for a company who have sparks do all the leccy work.
  4. S

    Salus RT500RF remote programmable room stat

    Hello all, Got a problem with a new Salus RT500RF stat.The boiler is coming on during periods when the stat is set to 10 degrees and the room is not that cool.The boiler is a Main Eco 30 combi.I believe that the unit is wired correctly. Has anyone had similar problems?Any ideas?
  5. R

    Programmable TRV's

    Hi, I'm thinking about fitting programmable TRV's , the ones I've looked at are Honeywell Rondostat, etrv and Pegler Terrier itemp. Prices vary massively, what would you go for and why? Any advice appreciated.
  6. O

    Part L heating zone compliance??

    What is the best way with boiler upgrades etc to comply with zoning requirements of part l, programmable trv's etc......
    • oaky
    • Thread
    • boiler central heating system combi compliance forum heating part l parts plumbing programmable still zone zones
    • Replies: 18
    • Forum: Plumbing Zone
  7. R

    Programmable TRV's - any they any good ?

    As the question says...... Would u recommend them, if so, what make ? Thanks
  8. P

    RF Programmable Stat with Boost

    Hi, Trying to find a wireless Programmable Stat which has a 1 Hour boost button, instead of overiding then the system running until the the original 'off' set program turns ot off. If worst comes to worst I'll try and find a round for a wired Programmable Stat, can anyone reccomend one which...
  9. M

    Timer for an Ideal Logic plus 30

    We're about to have an Ideal Logic plus 30 combi installed and would like a timer which can cope with holidays. Are we stuck with an Ideal timer wired or wireless, or can we use one from a different maker. We would like a big display preferably backlit. Have any of you any recommendations for...
    • mikeonfreeserve
    • Thread
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  10. M

    Programmable room thermostats

    I think I have a problem with my ageing Drayton RTS5 manual thermostat It's connected to a Drayton timeswitch/Potterton System boiler. Basically the boiler + CH is just on all the time regardless of the thermostats temperature setting. I've reset the timeswitch and the room stat appears to be...
  11. B

    Wireless programmable thermostats

    Central heating system has never had a room thermostat just relied on thermostatic radiator valves. Would like to install a wireless programmable thermostat, any one had any experience of the Salus st620rf? Saw one in a house over the weekend and it looked impressive but only been operating a...
    • Bowlingman
    • Thread
    • honeywell house programmable quality salus thermostat thermostats wireless
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  12. C

    Programmable Room Stat with Lock feature

    Anyone got any recommendations for a decent wireless programmable room stat that can be locked to stop tampering? I'm quoting for zoning an old system in a social club and they want to use programmable stats, I usually use Honeywell but I cant find one that I can lock. Any suggestions...
  13. B

    wireless programmable room thermostat

    Hi, I've got a Vaillant Ecotec plus 837, and i want to install a wireless programmable room thermostat in (doesnt have to be built in). Does anyone know of a unit that has the option of doing the extra hour function? thanks bhupesh
  14. F

    Wireless Programmer for Remeha 28c - Suggestions

    Can anyone give me some suggestions on a wireless programmer/thermostat for a Remaha 28c, i have heard the best ones are opentherm(modulating ones). And can i fit myself without voiding warrenty on boiler. I was looking at the Remeha iSense RF but its not available in uk only from holland ( if...
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    • honeywell programmable programmer remeha salus suggestions thermostats wireless
    • Replies: 21
    • Forum: Plumbing Jobs | The Job-board
  15. M

    Programmable room stat recommendations

    Hi Guy’s. I am looking for a recommendation for a simple to use programmable room thermostat but, and here’s my problem. It needs to be fairly big and chunky with a positive click or tone when turned on. It has to be used by a customer of mine who has very poor control over their hands and is...
  16. T

    Replacement Room Thermostat - Manual to Programmable Digital

    Currently have an acl Drayton RTS 1 room thermostat, but want to replace with a programmable (5/2) digital thermostat so I can change heating requirements throughout the day and night. Been browsing loads of sites but can't find one to replace. Taking off the current thermostat and the wiring...
    • TomBradbury
    • Thread
    • cable digital drayton heating honeywell manual programmable replacement thermostat wireless yellow
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  17. J

    S Plan, 2 Houses, 2 Pumps, 2 Programmable Controllers, 1 Shared Gas Boiler

    Is this possible? Do you just wire up the boiler as per the S-Plan Wiring Diagram, and wire the boiler switched live from both controllers? Do i need a bypass valve? How is this controlled....don't the boiler pumps stop when the valves close? Thanks, James.
  18. M

    installing a programmable room stat to a radiant sirrus boiler

    i have a job to install a programmable rf room stat to a radiant sirrus boiler,now i've never come across one these boilers before and was looking for some guidance on the wiring for it and i'm a bit unsure. have any of you fuys out there dealt with one of these??
    • moogwai
    • Thread
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    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  19. M

    RF Programmable Thermostat - Help

    Hi All, I would like some advice on an RF programmable thermostat unit. We have recently had fitted a new "Worcester Bosch Greenstar 24Ri" and at the time I requested that the engineer source and fit an RF Programmable Thermostat unit so we could set 5/2 and 7 Day programs to give us more...
    • MarkT21
    • Thread
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    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  20. S

    Programmable 7 day room stat

    Hi, I have underfloor heating (wet) and each of the zones is controlled by a Danfoss TP5 Room stat (With 2 wire feed). One of my TP5s screen has broken and I'm therefore going to upgrade to a 7 day programmable one with "Smart start" or "Optimum Start". Which Room stat would you recommend...
    • SmogLee
    • Thread
    • combi control difficult heating overheat programmable room stat screen system underfloor underfloor heating valve wide wireless
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
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