Hello I been going through some bags of parts and found this bag with approximately 200 transistors, all new, but what are they?
Should be a triac. Page 209: https://www.google.com/url?sa=t&rct...usg=AOvVaw3xT2rnb_SJSU7fHnJkBGnj&opi=89978449
Hugo
Hugo
60V 0.6A triac - didn't know they were available for low voltages, I've only encountered mains-rated ones before.
I encountered one in a 12V supply car timing light, it was triggering the flash lamp.
There may be other uses as well.
There may be other uses as well.
Why would it need to be bi-directional? I used to play with 2N5060’s all the time in the early years. Never needed or wanted bidirectional till I started playing with AC mains. Early experiments with triacs and transformers usually ended badly, too.
I have no idea as well, because low voltage DC motors are normal. AC motors are rarely found in low voltage use.
May be the use is in a AC voltage controller?
May be the use is in a AC voltage controller?
Thermostats and HVAC, irrigation controllers and anything that uses ~24VAC, which is a lot of stuff. Your home has heat and cooling, right? Every house with a lawn in the ~USA.
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Its midsummer in the UK, raining and 16C (61F), no we don't have cooling, we hardly ever need it!! (a couple of weeks a year or so it might be uncomfortably hot, people go to the beach/river/lake). And irrigation? If we ever need it there will be water shortages anyway!
In general stuff is either mains or DC low voltage anyway - never seen 24Vac in the wild here.
In general stuff is either mains or DC low voltage anyway - never seen 24Vac in the wild here.
24 VAC is very common for running things like thermostats and sprinkler controllers and doorbells and whatnot in the US of A. My basement has a couple of 24 VAC transformers to power the various doodads needed in my house.
http://bestsmarthometrends.com/wp-content/uploads/2017/07/Thermostat-Wiring-Colors.png
https://www.homedepot.com/s/24vac transformer?NCNI-5
https://www.irrigationexpress.co.nz/controller-wiring-guide/
And some apartment doorbells, vs ~16VAC. An interesting trick is to use (1n4002) diodes to double the control lines. I did this for a high-rise customer to add a separate door buzzer. I installed a gadget in my daughter's house that allows 3(+) functions on a single pair of existing wires, rather than trying to pull in a new cable. It uses diodes and a resistor at the thermostat and a decoder box in the furnace that break out heat, cool and fan to separate 24VAC circuits. Irrigation controllers and new thermostats uses small TRIACs to switch 24VAC. Note that TRIACs are driven with negative gate current, i.e. an NPN collector, because most TRIACs are 3 quadrant devices that do not work well with positive gate current.
https://www.homedepot.com/s/24vac transformer?NCNI-5
https://www.irrigationexpress.co.nz/controller-wiring-guide/
And some apartment doorbells, vs ~16VAC. An interesting trick is to use (1n4002) diodes to double the control lines. I did this for a high-rise customer to add a separate door buzzer. I installed a gadget in my daughter's house that allows 3(+) functions on a single pair of existing wires, rather than trying to pull in a new cable. It uses diodes and a resistor at the thermostat and a decoder box in the furnace that break out heat, cool and fan to separate 24VAC circuits. Irrigation controllers and new thermostats uses small TRIACs to switch 24VAC. Note that TRIACs are driven with negative gate current, i.e. an NPN collector, because most TRIACs are 3 quadrant devices that do not work well with positive gate current.