HV High Voltage DC-DC Step Up Geiger Power Supply Module w/TTL Tube Signal

Description: Adjustable High Voltage Power Supply Module for Geiger Tube. Compatible with 400V and 500V GM tubes. Tube Geiger pulses are translated to TTL output signals that allows you to drive long probe cables without signal attenuation and without reducing HV performance. This is unique module with low quiescent current, stable high voltage and buffered tube signal TTL output. The output pulse is 2.5us-5us duration.The module can be used for building high quality external cable probes for DIY Geiger Counters or for building portable DIY dosimeters, radiation detectors or monitoring projects. Please download user manual PDF for more technical details! The module is compatible with many Russian and American GM tubes, for example LND-7317, LND-7312, LND-7313, LND-7314, LND-712, SBM-20, Beta-1, Beta-2, SBM-19 and more. If you have particular tube you have doubt about working voltage compatibility just message me to ask. In this eBay auction you get: 1 soldered HV module, see product picture. Why I recommend this module for Geiger Probes: While using external probe build with DIY Geiger kits you may notice that many DIY probe construction feed the tube with high voltage transferred over the cable. High voltage and signal path line becomes a very long conductor with parasitic capacitance and inductance that reduce HV performance and add signal attenuation at high speed counts. Because Geiger tube signals are very short and weak, and when the cable length is increased over one meter, you will notice that the counter starts read less CPM that you can get if you were connecting same tube with shorter wires. There is no difference on background radiation count, but significant problem if you start test your probe in high radiation area where CPM load increased over 30K. "RH High Voltage Probe Driver" has output pin with GM tube buffered TTL signal that can be transferred over long probe cable. The maximum cable length mostly depend on cable quality you use. Up to 3 meters of probe length you can use a standard stereo wire. For probes with cable length over 5 meters I would recommend to use high grade microphone cable with lowest DC resistance. Left+Right uses for VDD and TTL signal when GND have to be shield conductor of the cable. The module do not have reverse polarity protection! Please put attention how you connect the battery. We do not accept any claims caused by wrong polarity connection! See attached diagram for the module pinout. However, the product has technical warranty and we can repair your unit if something fail during 6 months of usage. Feel free to ask me before purchase if you have any question of need technical advice later. Technical specifications: Adjustable High Voltage Output for 400V or 500V GM tube Compatible with many popular GM Tubes 2.5uS - 5.0uS TTL output of GM pulses Ability to drive long probe cable Input supply voltage 3.0V-4.5V Output current 100uA max. at 550V Includes 4.7M load resistor on the PCB Compatible with PIC / AVR / MSP / Arduino projects Compatible with MyGeiger ver.2 DIY Geiger Kit Physical dimensions: Diameter of the PCB is 53mm (LND-7317 size) UPC Number: 635292807381 SKU: RH-K-GK-HV HV converter of the module is very efficient on background. With background ambient radiation the current drawn is 200uA (0.20mA) at 400V settings and 300uA(0.30mA) at 520V settings. The maximum output current at 550V is 100uA. The input current depend on radiation or resistive load you apply to HV output, download user manual PDF to see the graphs. The converter works fine with multimeter load, so you can measure the high voltage output directly with regular 10M multimeter at TP pad on the PCB.The tube anode wire soldered to HV pad. Load resistor 4.7M already installed on the PCB. The module is compatible with almost every 400V or 500V type Geiger tubes. The round shape of PCB allows you to glue it directly on the pancake LND-7317 metal back-side. The user manual PDF has example photos of the probe construction with LND tube and Atomic.Dave installation kit enclosure. The HV Module PCB can be used not only for building external probes. You may have already guessed that it also can be used for building a simple radiation detector. It require just several passive components to solder very basic detector: neon bulb, 5M resistor and piezo disc. Arduino UNO example code to catch GM pulses during 1 minute: // Arduino UNO Example code to count GM pulses during one minute from the detector // if the INT is floating you may need to add 1K resistor to pull down to GND the INT port #include unsigned long counts; //variable for GM Tube events unsigned long cpm; //variable for CPM unsigned long previousMillis; //variable for time measurement void tube_impulse(){ //procedure for capturing events from Geiger Kit counts++; } void setup(){ //setup procedure counts = 0; cpm = 0; Serial.begin(9600); // start serial monitor // uncommennt if you have time-out problem to connect with Radiation Logger // delay(2000); // Serial.write('0'); // sending zero to avoid connection time out with radiation logger // delay(2000); // Serial.write('0'); // sending zero to avoid connection time out with radiation logger pinMode(2, INPUT); // set pin INT0 input for capturing GM Tube events digitalWrite(2, LOW); // turn off internal pullup resistors, you may need to add 1K resistor to pull down to GND the INT port (if INT pin is floating) //---------------------Allow external interrupts on INT0-----------------------------// attachInterrupt(0, tube_impulse, RISING); //define external interrupts low-high-low //-----------------------------------------------------------------------------------// } void loop(){ //main cycle unsigned long currentMillis = millis(); if(currentMillis - previousMillis > 60000){ // if 60 seconds are passed previousMillis = currentMillis; cpm = counts; Serial.print(cpm); // send cpm data to Radiation Logger Serial.write(' '); // send null character for "Radiation Logger" to separate next data, check your hardware for actual UART separate sing counts = 0; } }

Price: 50 USD

Location: Jerusalem

End Time: 2024-03-21T23:01:59.000Z

Shipping Cost: 19.95 USD