Dc to pulse width modulator k8004 illustrated assembly manual h8004ip-2 total solder points: 82 difficulty level: beginner 1 2 3 4 5 advanced allows very eff icient control o f dc motors, heate rs or lights..
2 features: pwm range: 0 to 100%. Pwm frequency: 100 to 5000hz adjustable. Minimum pwm offset: 0 to 20% adjustable. Adjustable sensitivity: 2.5 to 35vdc short circuit protection. Overload protection: 6.5a specifications: power supply: 8 to 35vdc unregulated supply current (no load): 35ma typ efficie...
3 assembly hints 1. Assembly (skipping this can lead to troubles ! ) ok, so we have your attention. These hints will help you to make this project successful. Read them carefully. 1.1 make sure you have the right tools: • a good quality soldering iron (25-40w) with a small tip. • wipe it often on a ...
4 assembly hints 1.3 soldering hints : 1- mount the component against the pcb surface and carefully solder the leads 2- make sure the solder joints are cone-shaped and shiny 3- trim excess leads as close as possible to the solder joint remove them from the tape one at a time ! Axial components are t...
5 r1 : 220 (2-2-1-b) r2 : 220 (2-2-1-b) r3 : 2k2 (2-2-2-b) r4 : 2k2 (2-2-2-b) r5 : 10k (1-0-3-b) r6 : 100k (1-0-4-b) r7 : 220k (2-2-4-b) 2. Resistors r... Construction d1 : 1n4148 d2 : 1n4148 d3 : 1n4007 1. Diodes. Watch the polarity ! D... Cathode ic1 : 16p 3. Ic socket. Watch the posi- tion of the...
6 construction t1 : bc547 7. Transistor c5 : 10µ f c6 : 10µ f c7 : 100µ f (40vmin) 8. Electrolytic capacitor. Watch the polarity ! C... D4 : 6a2 / 6a6 9. Diode, check the polarity d... Cathode j1 : 2p j2 : 2p j3 : 2p 10. Screw connectors r8 : 0,22 (r22) r9 : 0,22 (r22) r10 : 0,22 (r22) 11. 5w resist...
7 test 14. Test connect the supplied 4k7 resistor between the + and - points of the load. Connect the vref point to the dc input. Set preset rv3 to the middle of its adjustment range. Connect a dc voltage between 8 and 35v with the points +v and gnd. Measure between the + and - points of load with a...
8 different configurations figure a : standard configuration, use a separate control voltage. Figure b : connection to one of the analogue outputs of the k8000 interface card. If dac1 is used then the circuit can be controlled with the demo program, "dimmer". The circuit can also be tested with the ...
9 setting up 16. Setting up rv1: setting the minimum output voltage. Set the control voltage to zero (perhaps by disconnecting it). An initial pre-voltage can then be adjusted using preset rv1. This is especially useful with motors (in order to overcome mechanical resistance) and with halogen lamps ...
10 pcb 17. Pcb p8004'2.
11 18. Schematic diagram. Schematic diagram t1 d2 d1.
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