Home  |  Circuit diagrams  |  Electronics projects  |  Store  |  Links  |  Contact  |  Privacy policy  |  Sitemap

..::::..





Tan Timer

Tan Timer

Parts:

R1_____________47K 1/4W Resistor
R2______________1M 1/4W Resistor
R3,R5_________120K 1/4W Resistors
R4____________Photo resistor (any type)
C1,C3__________10΅F 25V Electrolytic Capacitors
C2____________220nF 63V Polyester Capacitor
D1,D2________1N4148 75V 150mA Diodes
IC1____________4060 14 stage ripple counter and oscillator IC
IC2____________4017 Decade counter with 10 decoded outputs IC
Q1____________BC337 45V 800mA NPN Transistor
SW1___________2 poles 6 ways Rotary Switch (see notes)
SW2___________SPST Slider Switch
BZ1___________Piezo sounder (incorporating 3KHz oscillator)
B1____________3V Battery (two 1.5V AA or AAA cells in series etc.)

Device purpose:

This timer was deliberately designed for people wanting to get tanned but at the same time wishing to avoid an excessive exposure to sunlight. A Rotary Switch sets the timer according to six classified Photo-types (see table). A Photo resistor extends the preset time value according to sunlight brightness (see table).
When preset time ends, the beeper emits an intermittent signal and, to stop it, a complete switch-off of the circuit via SW2 is necessary.

Photo-type Features Exposure time
I & children Light-eyed, red-haired, light complexion, freckly 20 to 33 minutes
II Light-eyed, fair-haired, light complexion 28 to 47 minutes
III Light or brown-eyed, fair or brown-haired, light or slightly dark complexion 40 to 67 minutes
IV Dark-eyed, brown-haired, dark complexion 52 to 87 minutes
V Dark-eyed, dark-haired, olive complexion 88 to 147 minutes
VI The darkest of all 136 to 227 minutes
Note that pregnant women belong to Photo-type I

Notes:

* Needing only one time set suitable for your own skin type, the rotary switch can be replaced by hard-wired links.
* A DIP-Switch can be used in place of the rotary type. Pay attention to use only a switch at a time when the device is off, or the ICs could be damaged.

Source: Electronics Lab

..:: Important ::..

Read disclamer, please!

 

Circuit diagrams home  |  Circuit diagrams  |  Electronics projects  |  Store  |  Links  |  Privacy policy  |  Contact


Cialis 5 mg senza ricetta Effetti collaterali del Cialis 5 mg Ordina Cialis 20mg Consegna a domicilio di Cialis originale in Svizzera Acquista Viagra in Svizzera senza prescrizione Cialis 10mg senza ricetta Dove comprare Viagra in farmacia online Sconto Cialis 5mg Dónde adquirir Reduslim Spedra Avanafil in vendita online Acquista Viagra in Svizzera senza prescrizione Dónde comprar Cialis Comprar Viagra Contrareembolso Descuento Cialis 5 mg Comprar viagra original Efectos secundarios de Cialis 5 mg Reduslim resultados Remedios para la Disfuncion Erectil Cilis vs Viagra Aviator ???? ?? ?????? Acquisto Cialis 5 mg online Cialis 5 mg effetti collaterali Comprare Cialis 20mg a buon prezzo Consegna a domicilio di Cialis originale in Svizzera Acquisto online di Viagra senza ricetta in Svizzera Cialis 10mg Acquistare Viagra in farmacia online Costo del Cialis 5mg Reduslim opiniones Comprare Spedra Avanafil senza ricetta online Dove comprare il Viagra in Svizzera Comprar Cialis barato precio Viagra genérico Descuento Cialis 5 mg Viagra sin receta Cialis 5 mg efectos secundarios severos Reduslim pérdida de peso Problemas de erección tadalafilo en venta avanafil prezzo cialis 20 mg prezzo cialis effetti benefici cialis 10 mg Reduslim Kaufen pulse x coin price avanafil prezzo buy cialis or generic tadalafil ?????? ?????? ??????????? ?????? ???????? ?????? ?????? ????????? ?????? ?????? ???????????? ?????? ?????? ? ?????? ??????????? http://diplomy-originaly.com ?????? ?????? ????? ?????? ?????? ? ??????? ??????????? ?????? ?????? ???????? ?????? ?????? ???????????? ?????? ?????? ???????????? http://diplomsagroups.com ?????? ?????? ????????? ??? ?????? ?????? ?????? ?????? ????????? ???? ?????? ?????? ? ??????? ??????????? ?????? ???????? http://sreestrom.ru/ ?????? ???????? ?? 11 ????? ?????? ?????? ?????????? ?????? ?????? ???? ?????? ?????? ? ???????? ?????? ?????? ? ?????? ??????????? https://russian-diplom.com ?????? ?????? ????????? ? ?????????? ? ?????? ?????? ?????? ???????????? http://rudiplomirovanie.com ?????? ?????? ? ??????? ?? ? ?????? ?????? ?????? ???? ?????? ?????? ???????? ?????? ?????? ? ??????? ?? ? ?????? ?????? ???????? https://premiums-diploms.com ?????? ?????? ? ???????? ?????? ?????? ????? http://russdiplomiki.com ?????? ?????? ????? ? ?????????? ? ?????? ?????? ?????? ??????????? https://diplomansy.com ?????? ?????? ? ?????????? ? ?????? ?????? ?????? ?????? ???? https://diploms-asx.com ?????? ?????? ? ?????????? ? ?????? ?????? ?????? ?????? ? ??????? ??????????? ?????? ?????? ????????? ???? ?????? ?????? ? ?????????? ? ?????? ???? ?????? ?????? ? ??????? ??????????? https://eonline-diploms.com ?????? ?????? ????????? ? ?????????? ? ?????? ?????? ????????????? ? ???????? http://free-diplommi.com ?????? ????????? ?????? ?????? ?????? ????????????? ? ???????? http://diplomrussian.com ?????? ?????? ?????????? ?????? ?????? ?????? ? ?????? ??????????? ?????? ?????? ???????????? ?????? ?????? ???? ? ?????????? ? ?????? ?????? ?????? ????????? ?????? ?????? ???????? ?????? ?????? ???? ? ?????????? ? ?????? ?????? ?????? ???????? ?????? ?????? ?????? ?????? ? ?????????? ? ?????? ???? ?????? ?????? ???????? ?????? ???????? ?????? ?????? ????????? ? ?????????? ? ?????? ?????? ????????????? ? ????? ?????? ?????? ????? ?????? ?????? ????????? ? ?????????? ? ?????? ?????? ?????? ? ?????? https://diplomsy-landsy24.ru/ ?????? ?????? ???? ? ?????????? ? ?????? ??? ?????? ?????? http://diploms-service.com ?????? ?????? ????????? ? ?????????? ? ?????? ?????? ?????? ???????????? https://kyc-diplom.com ?????? ??????????? ?????? ? ?????????? ? ?????? ?????? ?????? ???????????? ??? ?????? ?????? ?????? ?????? ? ???????? ??? ?????? ???????? https://originaly-dokuments.com ?????? ?????? ? ?????????? ? ?????? ?????? ?????? ?????? ???? https://diplomy-grup24.com/ ?????? ?????? ? ?????????? ? ?????? ???? ?????? ?????? ??????????? ?????? ?????? ????????? ?????? ?????? ???????? ?????? ?????? ?????? ?????????? https://diplomansy.com/kupit-diplom-novogo-obrazca?????? ?????? ? ????????? ? ?????? ?????? ?????? ????????? ???? ?????? ?????? ? ?????? ????????? ?????? ?????? ? ???????? ???? ?????? ?????? ???? https://diploms-asx.com/kupit-diplom-magistra ?????? ?????? ? ?????????? ? ?????? ??????