http://www.simplecircuitdiagram.com Free Simple Circuit Diagram Mon, 06 Feb 2012 04:23:39 +0000 en hourly 1 http://wordpress.org/?v=abc http://www.simplecircuitdiagram.com/2011/03/03/bandpass-filter-for-bell103a-originator-modem/ http://www.simplecircuitdiagram.com/2011/03/03/bandpass-filter-for-bell103a-originator-modem/#comments Thu, 03 Mar 2011 07:11:02 +0000 Rend http://www.simplecircuitdiagram.com/?p=2419 Bell103A modem standard specify that the originator (the caller) uses 1070Hz and 1270Hz frequency shift keying for transmission, and listen for 2025/2225Hz FSK transmitted by the answering modem. This bandpass circuit filter out any frequency beyond 2025-2250 Hz to improve … Continue reading →]]> http://www.simplecircuitdiagram.com/2011/03/03/bandpass-filter-for-bell103a-originator-modem/feed/ 0 http://www.simplecircuitdiagram.com/2011/01/05/rs232-line-to-5-v-level-converter/ http://www.simplecircuitdiagram.com/2011/01/05/rs232-line-to-5-v-level-converter/#comments Wed, 05 Jan 2011 01:19:28 +0000 Rust http://www.simplecircuitdiagram.com/?p=2260 RS 232 line to 5 V converter circuit schematic diagram is shown on the following figure. The MAX680 is normally used as a charge pump voltage converter. This converter can convert +5 V to ±10V. The MAX 680 works in … Continue reading →]]> http://www.simplecircuitdiagram.com/2011/01/05/rs232-line-to-5-v-level-converter/feed/ 0 http://www.simplecircuitdiagram.com/2010/12/21/ltc1045-ttl-rs-232-converter/ http://www.simplecircuitdiagram.com/2010/12/21/ltc1045-ttl-rs-232-converter/#comments Tue, 21 Dec 2010 01:56:19 +0000 Rust http://www.simplecircuitdiagram.com/?p=2167 A simple way to build a battery-powered RS-232 receiver  circuit is shown on the following schematic diagram. This circuit convert RS232 level to TTL level. Because the 100 KΩ resistor prevents device damage, the input voltage can be driven as much … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/12/21/ltc1045-ttl-rs-232-converter/feed/ 0 http://www.simplecircuitdiagram.com/2010/10/28/lm359-fast-photodiode-amplifier/ http://www.simplecircuitdiagram.com/2010/10/28/lm359-fast-photodiode-amplifier/#comments Thu, 28 Oct 2010 09:13:59 +0000 Rend http://www.simplecircuitdiagram.com/?p=1720 Photo-diode can be used for high speed digital transmission, but you have to provide high speed signal conditioner for that purpose. The amplifier circuit shown in the schematic diagram below satisfy the high-speed requirement. The circuit is based on current … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/10/28/lm359-fast-photodiode-amplifier/feed/ 0 http://www.simplecircuitdiagram.com/2010/10/22/lm359-1mhz-balanced-line-driver/ http://www.simplecircuitdiagram.com/2010/10/22/lm359-1mhz-balanced-line-driver/#comments Fri, 22 Oct 2010 03:00:25 +0000 Rend http://www.simplecircuitdiagram.com/?p=1711 Balanced signal consist of two lines that have opposite phases, and should be received with differential input receiver. Balanced signal is employed in many telecommunication techniques to improve transmission system’s noise immunity. Balanced signal is usually transmitted in twisted pair … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/10/22/lm359-1mhz-balanced-line-driver/feed/ 0 http://www.simplecircuitdiagram.com/2010/10/14/567-ic-touch-tone-decoder/ http://www.simplecircuitdiagram.com/2010/10/14/567-ic-touch-tone-decoder/#comments Thu, 14 Oct 2010 02:35:11 +0000 Rend http://www.simplecircuitdiagram.com/?p=1487 This touch tone decoder can be used to decode a DTMF (Dual Tone Multiple Frequency) signal from a telephone device or from other generator. Using the frequency values shown in the schematic diagram, this circuit decodes a standard touch tone … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/10/14/567-ic-touch-tone-decoder/feed/ 0 http://www.simplecircuitdiagram.com/2010/09/30/2-5kv-isolated-rs232-ttlcmos-converterdriverreceiver/ http://www.simplecircuitdiagram.com/2010/09/30/2-5kv-isolated-rs232-ttlcmos-converterdriverreceiver/#comments Thu, 30 Sep 2010 03:27:23 +0000 Rust http://www.simplecircuitdiagram.com/?p=1561 The ADM3251E is a transceiver which has a high speed, 2.5 kV fully isolated, single channel RS-232/V.28. This device is operates from a single 5 V power supply. The device is ideally suited for operation in electrically harsh environments or … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/09/30/2-5kv-isolated-rs232-ttlcmos-converterdriverreceiver/feed/ 0 http://www.simplecircuitdiagram.com/2010/04/27/precision-photodiode-comparator/ http://www.simplecircuitdiagram.com/2010/04/27/precision-photodiode-comparator/#comments Tue, 27 Apr 2010 02:14:45 +0000 Rust http://www.simplecircuitdiagram.com/?p=1034 This photodiode signal conditioning circuit is sensitive to light signal, suitable for interfacing digital serial signal. The biasing of the LM111 noninverting input is matched to the diode’s dark output, so it should be very sensitive. [Source: National Semiconductor Application … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/04/27/precision-photodiode-comparator/feed/ 0 http://www.simplecircuitdiagram.com/2010/04/25/digital-transmission-isolator/ http://www.simplecircuitdiagram.com/2010/04/25/digital-transmission-isolator/#comments Sun, 25 Apr 2010 13:55:41 +0000 Rust http://www.simplecircuitdiagram.com/?p=1013 Digital transmission isolation is important for keeping the digital noise to reach the analog path, that’s the benefit for noise isolation. For electrical isolation, isolating the signal after digitizing is often easier since digital signal is inherently nonlinear, no need … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/04/25/digital-transmission-isolator/feed/ 0 http://www.simplecircuitdiagram.com/2010/01/28/rs-485-signal-loss-detection/ http://www.simplecircuitdiagram.com/2010/01/28/rs-485-signal-loss-detection/#comments Thu, 28 Jan 2010 01:18:11 +0000 Adam http://www.simplecircuitdiagram.com/?p=523 The safety shutdown and fault isolation protocol are critical in many telecommunication, industrial, data processing system and industrial. To share data between communication processor or single-board computers, actuator and sensors, the fault detection system uses RS-485. This RS-485 uses two … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/01/28/rs-485-signal-loss-detection/feed/ 0