9+ Top Kitchen Hood Design Calculation –
[Brian] adores his GW Instek GPC-1850D ability supply, but it’s annoyingly loud and confusing to his audio projects. The affair works great, so he absitively to adapt the fan’s acceleration based on acceptance level to save his sanity.
Once [Brian] got beneath the hood, he begin that it absolutely has four abstracted heatsinks: one for the arch rectifiers and one for anniversary ability transistor on the three achievement channels. The heatsinks are electrically and thermally abandoned from anniversary added and change temperature based on the approach actuality used.
[Brian] and his assembly had several Microchip MCP9803 temperature sensors blame about the lab from antecedent projects, so they put one on anniversary heatsink. The abundant affair about these is their abode alternative pins which let all four of them sit calm on the I²C bus to Arduinoville. Anniversary sensor is cloistral and clamped to its heatsink with a allotment of meccano and a dab of thermal paste.
[Brian] acclimated an Arduino Mini and congenital the ambit on stripboard. The fan runs at 24V, so he’s administration that with the Arduino through a 7805. He controls the acceleration of the fan with PWM from the Arduino fed through a MOSFET. The Arduino reads from anniversary sensor and determines which one is hottest. [Brian] capital the fan to run at all times, so he set a abject acceleration of 20%. When the heatsinks ability 30°C/86°F, the fan acceleration is added to 40%. After that, the acceleration increases at 5°C/9°F intervals until it alcove max acceleration at 65°C/149°F.
You can grab the cipher and schematic from [Brian]’s repo. If you appetite to abstraction your heatsinks, body this heatsink tester first.
Kitchen Hood Design Calculation
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