Micro fans timed switch
Budget: $30 – $250 USD
When a pushbutton is pressed the circuit should activate two DC micro motors to run for around 3 minutes. This timing should be tunable via a variable resistor. This system should run on one rechargeable battery, so the circuit should also be able to charge this battery via usb.
Motor specifications are: Rated voltage 3.4 V, Rated Current 750 mA. More info found here: https://www.ricmotor.com/details/8mm-coreless-motor
Battery specifications are: Capacity 450mAh, operating voltage 3.8V, C-rate 30C. More info found here: https://www.getfpv.com/auline-450mah-hv-1s-3-4v-80c-lipo-battery-ph-2-0.html?utm_medium=cpc&utm_term=Home&utm_source=bingproductsads+%28via+ShoppingFeed%29&h_campaign_id=376881622&bng_id=1273235278322716&h_ad_id=79577332342160&msclkid=d8c28a076cb71d824351ee8f1f541ddf&utm_campaign=DM+-+Shop+-+SM+-+v1&utm_content=Ad+group+%231
Motor specifications are: Rated voltage 3.4 V, Rated Current 750 mA. More info found here: https://www.ricmotor.com/details/8mm-coreless-motor
Battery specifications are: Capacity 450mAh, operating voltage 3.8V, C-rate 30C. More info found here: https://www.getfpv.com/auline-450mah-hv-1s-3-4v-80c-lipo-battery-ph-2-0.html?utm_medium=cpc&utm_term=Home&utm_source=bingproductsads+%28via+ShoppingFeed%29&h_campaign_id=376881622&bng_id=1273235278322716&h_ad_id=79577332342160&msclkid=d8c28a076cb71d824351ee8f1f541ddf&utm_campaign=DM+-+Shop+-+SM+-+v1&utm_content=Ad+group+%231