555 household electric hot compress humidity control circuit

Published:2011/5/23 19:47:00 Author:TaoXi | Keyword: household, electric, hot compress, humidity control | From:SeekIC

As the figure 16-11 shows, the temperature control circuit is composed of the regulated DC power supply, the timing circuit and the temperature control circuit.etc. The 1～30 minutes timing circuit is composed of the 555 and RP1，R5，C5.etc. The length of time depends on the values of RP1，R5 and C5. td=1.1(RP1+R5)C5, you can change the timing time by adjusting RP1. When you are using this circuit, press the switch AN, the 555 output (pin-3) becomes the 11V high potential as the power supply of the IC3 thermostatic circuit. At the same time, the timing begins. The R10，C7 integral circuits have the same function with the R4，C3 integral circuits of IC2.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/555_household_electric_hot_compress_humidity_control_circuit.html

Print this Page | Comments | Reading(3)