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university:courses:electronics:electronics-lab-breadboards [04 May 2014 02:05]
Doug Mercer [Using breadboards with the Analog Discovery Module:]
university:courses:electronics:electronics-lab-breadboards [12 Apr 2017 12:32]
Antoniu Miclaus rename
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 5. Trimming the leads of components like resistors, capacitors, transistors and LEDs, so that they fit closely to the board and do not get pulled out by accident is a good practice.\\ 5. Trimming the leads of components like resistors, capacitors, transistors and LEDs, so that they fit closely to the board and do not get pulled out by accident is a good practice.\\
  
-===== Using breadboards with the Analog Discovery ​Module: =====+===== Using breadboards with the ADALM2000 ​Module: =====
  
-All the connections to the Analog Discovery ​design kit are made though the 30 pin male header (0.1" centers) connector on the side of the module. This is a very common, generic style connector and is simple to attach wires to as with the various female to female cables supplied in the kit. Double length square male pins are included to change the female end of the wires into male pins that can be easily inserted into the solder-less breadboards used in the lab for building example circuits. These fly-wires are several inches long and can be awkward to use at times given the relatively light weight of the Discovery ​box and a small solder-less breadboard.+All the connections to the ADALM2000 ​design kit are made though the 30 pin male header (0.1" centers) connector on the side of the module. This is a very common, generic style connector and is simple to attach wires to as with the various female to female cables supplied in the kit. Double length square male pins are included to change the female end of the wires into male pins that can be easily inserted into the solder-less breadboards used in the lab for building example circuits. These fly-wires are several inches long and can be awkward to use at times given the relatively light weight of the ADALM2000 ​box and a small solder-less breadboard.
  
-Adapters such as those shown below are workable alternatives. They adapt the square male pins of the Discovery ​connector to two rows of male pins on 300 mil spacing (like DIP packages) that will plug nicely into a solder-less breadboard.+Adapters such as those shown below are workable alternatives. They adapt the square male pins of the ADALM2000 ​connector to two rows of male pins on 300 mil spacing (like DIP packages) that will plug nicely into a solder-less breadboard.
  
 {{:​university:​courses:​electronics:​dual_row_receptical-10.jpg?​300 |}} {{ :​university:​courses:​electronics:​dual_row_receptical-14.jpg?​300}} {{ :​university:​courses:​electronics:​dual_row_receptical-20.jpg?​300 |}} {{:​university:​courses:​electronics:​dual_row_receptical-10.jpg?​300 |}} {{ :​university:​courses:​electronics:​dual_row_receptical-14.jpg?​300}} {{ :​university:​courses:​electronics:​dual_row_receptical-20.jpg?​300 |}}
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 A 12 pin (dual row of six) version is also available from:​[[http://​www.digilentinc.com/​Products/​Detail.cfm?​NavPath=2,​401,​1081&​Prod=PMOD-DIP|Digilent PmodDIP]] A 12 pin (dual row of six) version is also available from:​[[http://​www.digilentinc.com/​Products/​Detail.cfm?​NavPath=2,​401,​1081&​Prod=PMOD-DIP|Digilent PmodDIP]]
  
-The smaller adapters can be used individually or combined to fill out the entire 30 pins of the Discovery ​connector, 10+20 or 14+16.+The smaller adapters can be used individually or combined to fill out the entire 30 pins of the ADALM2000 ​connector, 10+20 or 14+16.
  
-Another more convenient arrangement would be an adapter PC board that connects to the 30 pin male header of Discovery ​and brings all the connections to a female header positioned right alongside the breadboard area. By using a female header simple 22 gage solid wire jumpers can be used to connect to the breadboard rather than the long female to female fly-wires supplied with the kit. An example 3.1" by 3.4" adapter PC board layout is shown in figure 4.+Another more convenient arrangement would be an adapter PC board that connects to the 30 pin male header of ADALM2000 ​and brings all the connections to a female header positioned right alongside the breadboard area. By using a female header simple 22 gage solid wire jumpers can be used to connect to the breadboard rather than the long female to female fly-wires supplied with the kit. An example 3.1" by 3.4" adapter PC board layout is shown in figure 4.
  
 {{ :​university:​courses:​electronics:​abb_f4.jpg?​350 |}} {{ :​university:​courses:​electronics:​abb_f4.jpg?​350 |}}
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 <WRAP centeralign>​ Figure 4 Breadboard adapter layout </​WRAP>​ <WRAP centeralign>​ Figure 4 Breadboard adapter layout </​WRAP>​
  
-The board consists of a grid of 21 by 30 plated through holes on 0.1" centers which can be used to solder test circuits. Three of the columns of holes on the left side of the grid are shorted together and tied to the +5V, -5V and ground connections on the 30 pin right angle female connector that mates with Discovery. Three of the columns of holes on the right side of the grid are shorted together and tied to the +9V, -9V and ground connections for use with external batteries or other sources of power. The 30 Discovery ​connections are brought to a breakout space for a 40 pin vertical female header positioned alongside the breadboard area.+The board consists of a grid of 21 by 30 plated through holes on 0.1" centers which can be used to solder test circuits. Three of the columns of holes on the left side of the grid are shorted together and tied to the +5V, -5V and ground connections on the 30 pin right angle female connector that mates with ADALM2000. Three of the columns of holes on the right side of the grid are shorted together and tied to the +9V, -9V and ground connections for use with external batteries or other sources of power. The 30 ADALM2000 ​connections are brought to a breakout space for a 40 pin vertical female header positioned alongside the breadboard area.
 The 21 X 30 grid is sized to accommodate the popular 30 position (400 total connection points) solder-less breadboards with power busses along both sides which are 2 1/8" by 3 1/4". These breadboards come with adhesive backs that will stick the breadboard to the adapter PC board. The 21 X 30 grid is sized to accommodate the popular 30 position (400 total connection points) solder-less breadboards with power busses along both sides which are 2 1/8" by 3 1/4". These breadboards come with adhesive backs that will stick the breadboard to the adapter PC board.
-The schematic of the adapter board is shown in figure 5. The signals and power supplies that Analog Discovery ​can generate are limited by the USB power available from the computer. The analog inputs can measure much larger +/- 20 volt signals. This board provides a place to connect external power sources such as a pair of 9 V batteries. A socket for a dual op-amp is included with the two amplifiers configured as non-inverting gain stages and are powered from the external power supplies. A pair of resistors for each amplifier sets the gain. Depending on the choice of amplifier it can be used, for example, to boost the voltage and/or current available from the AWGs or for other purposes in the circuit being breadboarded. The external power supplies along with the inputs and outputs of the two amplifiers fill out the extra 10 pins on the 40 pin header.+The schematic of the adapter board is shown in figure 5. The signals and power supplies that ADALM2000 ​can generate are limited by the USB power available from the computer. The analog inputs can measure much larger +/- 20 volt signals. This board provides a place to connect external power sources such as a pair of 9 V batteries. A socket for a dual op-amp is included with the two amplifiers configured as non-inverting gain stages and are powered from the external power supplies. A pair of resistors for each amplifier sets the gain. Depending on the choice of amplifier it can be used, for example, to boost the voltage and/or current available from the AWGs or for other purposes in the circuit being breadboarded. The external power supplies along with the inputs and outputs of the two amplifiers fill out the extra 10 pins on the 40 pin header.
  
 {{ :​university:​courses:​electronics:​abb_f5.jpg?​450 |}} {{ :​university:​courses:​electronics:​abb_f5.jpg?​450 |}}
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 <WRAP centeralign>​ Figure 5 Breadboard adapter schematic </​WRAP>​ <WRAP centeralign>​ Figure 5 Breadboard adapter schematic </​WRAP>​
  
-The layout of the resistors around the dual op-amp are arranged such that rather than two independent amplifiers, a single resistor can be inserted between the two inverting inputs, in place of the two resistors (R1,R4) to ground. Configured this way the two op-amps form the input section of an instrumentation amplifier. The amplified differential signal at the outputs of the two amplifiers can then be connected to the differential scope inputs on Discovery. Another possible use would be to generate complementary or differential signals from one of the AWGs. By connecting one input to ground, with the other input connected to one of the AWG outputs and adjusting the resistor values the first amplifier acts as a non-inverting stage to generate the in phase or true output and the other amplifier acts as an inverting stage to generate the 180º phase or complement output. To make it easy to swap resistor values individual pin sockets could be installed rather than directly soldering the resistors to the board. Likewise using a socket for the op-amp would allow you to interchange different devices optimized for the intended application. +The layout of the resistors around the dual op-amp are arranged such that rather than two independent amplifiers, a single resistor can be inserted between the two inverting inputs, in place of the two resistors (R1,R4) to ground. Configured this way the two op-amps form the input section of an instrumentation amplifier. The amplified differential signal at the outputs of the two amplifiers can then be connected to the differential scope inputs on ADALM2000. Another possible use would be to generate complementary or differential signals from one of the AWGs. By connecting one input to ground, with the other input connected to one of the AWG outputs and adjusting the resistor values the first amplifier acts as a non-inverting stage to generate the in phase or true output and the other amplifier acts as an inverting stage to generate the 180º phase or complement output. To make it easy to swap resistor values individual pin sockets could be installed rather than directly soldering the resistors to the board. Likewise using a socket for the op-amp would allow you to interchange different devices optimized for the intended application. 
-The Discovery ​hardware itself is rather small and light weight and special care should be taken when using an adapter like this. It might be useful to add small stick on rubber feet to the underside of the adapter board to help prevent it from tipping or sliding around on the work surface.+The ADALM2000 ​hardware itself is rather small and light weight and special care should be taken when using an adapter like this. It might be useful to add small stick on rubber feet to the underside of the adapter board to help prevent it from tipping or sliding around on the work surface.
  
 Eagle CAD schematic and PCB layout files can be down loaded here {{:​university:​courses:​electronics:​ad_breadboard.zip|}}. Eagle CAD schematic and PCB layout files can be down loaded here {{:​university:​courses:​electronics:​ad_breadboard.zip|}}.
university/courses/electronics/electronics-lab-breadboards.txt · Last modified: 18 Apr 2019 21:14 by Doug Mercer