Ten hours delay circuit

Published:2011/6/20 3:50:00 Author:TaoXi | Keyword: Ten hours, delay circuit | From:SeekIC

The ten hours delay circuit is as shown in the figure. The constant current source is composed of the transistor Q1 and the R1, R2, R3, the charge current can be adjusted to a few nA. The source follower is composed of Q2, the output is connected with the emitter of the single junction transistor Q3. The transistor which is connected into the diode supplies the low resistance discharging pathway to the timing capacitance. The delay time linearly changes with R3.



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

Print this Page | Comments | Reading(3)