Rapti Posted September 13, 2020 Posted September 13, 2020 Hello together, I am looking for a manual that explains the different toggle switches. What do the different switch positions (on-off, on-off-on, (on)-off-(on) etc. mean? I always find this difficult to order the right switches. e.g. the dispenser switch in the FA18? It is marked with "OFF-ON-BYPASS". Which switch do I need there? OFF-ON-ON?
Sokol1_br Posted September 13, 2020 Posted September 13, 2020 (edited) Basically is: Single Throw (ST) On-Off = two positions switch with electric contact only in ON.* Double Throw (DT) On-Off-On = three positions switch with contact in the outer postions (ON). On-On-On = three positions switch with contact in all positions. The above are latch switches, lever remain in last position. If switches positions are marked with (), means that the lever don't remain in this position, but make a momentary contact, returning to center when leaved (have a spring for this). E.g. (On)-Off (On)-Off-On < just one position is momentary (On)-Off-(On) < both outer position is momentary Besides the Throw, switches can have SP (Single Pole) or DP (Double Pole) connections pins. An On-OF SP have two pins only. An On-Off DP has four pins, see then as two switches controlled by just one lever. The DP type can be useful for overcome some game controls limitations, with just one lever movement you can send two commands for game. * You can make game execute a command in the Off position of this (On-Off) switch, adding this information in game LUA code for each aircraft. So, e.g. switch Up =light on, switch down = lights off Edited September 13, 2020 by Sokol1_br
No1sonuk Posted September 14, 2020 Posted September 14, 2020 I wrote this for another post in another part of this forum: SPST = Single pole, single throw = a 2-wire on-off switch. SPDT = Single pole, double throw = a 3-wire on-on switch. These have 3 contacts, where a common line is connected to one or the other of the two other contacts. SP3T = Single pole, 3 throw = a 3-wire on-off-on switch. These have 3 contacts, where a common line is connected to one or the other of the two other contacts if the lever is moved to the sides, or disconnected if moved to the centre position. These are sometimes called "SPDT centre-off". Then you get DPDT = Double pole, double throw = See SPDT, but there are two circuits. DP3T = Double pole, double throw = See SP3T, but there are two circuits. These are sometimes used as simple direction controls. 3PDT = three pole, double throw = See SPDT, but there are three circuits. These are less common, but they do exist - I have some Toggle and rocker switch descriptions usually list momentary (spring-loaded) contacts in brackets. e.g. ON-(ON) Would mean it's double throw, sprung toward the left, so pushing to the right is momentary. Another common one is (ON)-OFF-(ON). This would be sprung to return to the centre. An example of this would be the A-10 canopy open/close switch. SPST pushbutton switches are usually "normally open" - i.e. pressing the button completes the circuit. This is the default, so it usually isn't specified. it IS specified, though, if the switch is "normally closed", and they are available. Double throw pushbuttons and microswitches have contacts marked "C", "NC" and "NO", meaning "Common", "Normally Closed" and "Normally Open" respectively. In those cases, when the button is not pressed, "C" is connected to "NC". Then when pressed, "C" connects to "NO".
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