http://www.simplecircuitdiagram.com Free Simple Circuit Diagram Mon, 30 Apr 2012 02:31:06 +0000 en hourly 1 http://wordpress.org/?v=abc http://www.simplecircuitdiagram.com/2012/04/30/two-methods-for-push-button-controlled-power-switch/ http://www.simplecircuitdiagram.com/2012/04/30/two-methods-for-push-button-controlled-power-switch/#comments Mon, 30 Apr 2012 02:28:57 +0000 Rust http://www.simplecircuitdiagram.com/?p=2777 On these two following circuits, we can latch on the SCR (and thereby the lamp) by momentarily closing S1, thereby feeding gate drive to the SC via R1. The gate is tied to the cathode via R2 to improve circuit … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/04/30/two-methods-for-push-button-controlled-power-switch/feed/ 0 http://www.simplecircuitdiagram.com/2012/04/17/portable-calibrator-stable-10v-reference/ http://www.simplecircuitdiagram.com/2012/04/17/portable-calibrator-stable-10v-reference/#comments Tue, 17 Apr 2012 07:43:04 +0000 Rust http://www.simplecircuitdiagram.com/?p=2771 A stable voltage source is needed in many calibration process. Most electronic devices are affected by its surrounding temperature. To control all the components temperature by manipulating the surrounding temperature is not easy, but fortunately we can control only the … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/04/17/portable-calibrator-stable-10v-reference/feed/ 0 http://www.simplecircuitdiagram.com/2012/03/29/long-interval-rc-timer-using-op-amp/ http://www.simplecircuitdiagram.com/2012/03/29/long-interval-rc-timer-using-op-amp/#comments Thu, 29 Mar 2012 03:06:56 +0000 Rust http://www.simplecircuitdiagram.com/?p=2766 With the help of high gain high impedance operational amplifier, we can build a long time delay with resistor-capacitor (RC) circuit since it allow high resistance resistors to be used. We can calculate the time (t) using the following formula; … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/03/29/long-interval-rc-timer-using-op-amp/feed/ 0 http://www.simplecircuitdiagram.com/2012/03/15/speech-pass-filter/ http://www.simplecircuitdiagram.com/2012/03/15/speech-pass-filter/#comments Thu, 15 Mar 2012 15:59:54 +0000 Rust http://www.simplecircuitdiagram.com/?p=2763 A speech-pass filter circuitry is shown in the the schematic diagram below. This speech circuit is useful in an application when the frequency spectrum of the signal should be limited to contain only speech (human voice) information. Voice recording or … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/03/15/speech-pass-filter/feed/ 0 http://www.simplecircuitdiagram.com/2012/03/01/digital-ph-meter-signal-conditioner-2/ http://www.simplecircuitdiagram.com/2012/03/01/digital-ph-meter-signal-conditioner-2/#comments Thu, 01 Mar 2012 01:03:08 +0000 Rust http://www.simplecircuitdiagram.com/?p=2758 A signal conditioner for pH meter probe is required to have high input impedance. The signal conditioning of the pH meter probe is done by providing a buffer with gain, offset, and volatge to frequency converter. High input impedance requirement … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/03/01/digital-ph-meter-signal-conditioner-2/feed/ 0 http://www.simplecircuitdiagram.com/2012/02/06/simple-ultrasonic-wave-generator/ http://www.simplecircuitdiagram.com/2012/02/06/simple-ultrasonic-wave-generator/#comments Mon, 06 Feb 2012 04:23:39 +0000 Rend http://www.simplecircuitdiagram.com/?p=2751 Ultrasonic sound wave can be generated using electronic circuit. This simple electronic circuit can generate an ultrasonic wave with frequency range of 12 to 50 kHz. Its very easy and quick to make this circuit. This circuit uses NE555 IC … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/02/06/simple-ultrasonic-wave-generator/feed/ 0 http://www.simplecircuitdiagram.com/2012/01/24/general-infrared-remote-controlled-relay/ http://www.simplecircuitdiagram.com/2012/01/24/general-infrared-remote-controlled-relay/#comments Tue, 24 Jan 2012 02:31:05 +0000 Rend http://www.simplecircuitdiagram.com/?p=2752 This relay circuit is controlled by almost any type of infrared remote controller. This circuit works on assumption that almost all remote controller use high frequency modulated infrared light. By filtering out un-modulated or low frequency modulated signal, this circuit … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/01/24/general-infrared-remote-controlled-relay/feed/ 0 http://www.simplecircuitdiagram.com/2012/01/11/simple-ir-remote-tester/ http://www.simplecircuitdiagram.com/2012/01/11/simple-ir-remote-tester/#comments Wed, 11 Jan 2012 02:20:43 +0000 Rust http://www.simplecircuitdiagram.com/?p=2743 The most common problem for infra-red (IR) remote control is the failure to transmit the pulsed infra-red light. The circuit shown in the schematic diagram below is an IR remote control handset tester. This device is very useful and easy … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/01/11/simple-ir-remote-tester/feed/ 0 http://www.simplecircuitdiagram.com/2012/01/02/frequency-modulated-oscillator-for-fm-transmitter/ http://www.simplecircuitdiagram.com/2012/01/02/frequency-modulated-oscillator-for-fm-transmitter/#comments Mon, 02 Jan 2012 00:18:47 +0000 Rust http://www.simplecircuitdiagram.com/?p=2740 An oscillator can be built using LC (inductor-capacitor) tank circuit. When we vary the capacity of the capacitor in LC tank circuit then the frequency of the oscillator will vary according to capacitance change.  The idea of this modulator is … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/01/02/frequency-modulated-oscillator-for-fm-transmitter/feed/ 0 http://www.simplecircuitdiagram.com/2011/12/20/heart-monitor-ecg-sensor-signal-amplifierconditioner/ http://www.simplecircuitdiagram.com/2011/12/20/heart-monitor-ecg-sensor-signal-amplifierconditioner/#comments Tue, 20 Dec 2011 20:16:02 +0000 Rend http://www.simplecircuitdiagram.com/?p=2724 Using the circuit depicted in the schematic diagram below we can monitor the heart pulses of patient. This circuit buffer and amplify the heart pulses, and the amplification bandwidth ranges from DC to 3 kHz. For the core of the … Continue reading →]]> http://www.simplecircuitdiagram.com/2011/12/20/heart-monitor-ecg-sensor-signal-amplifierconditioner/feed/ 0